GMR Switch Precision Digital Sensors

Transcription

1 GMR Switch Precision Digital Sensors GMR Switch Precision Digital Sensors When GMR sensor elements are combined with digital on-board signal processing electronics, the result is the GMR Switch. The GMR Switch offers unmatched precision and flexibility in magnetic field sensing. The GMR Switch will accurately and reliably sense magnetic fields with less error than any other magnetic sensor on the market today. In addition, there is little shift in the magnetic field operate point of the GMR Switch over voltage and temperature extremes. This gives NVE s customer the ability to make a high precision, high tolerance magnetic sensing assembly. The GMR switch can operate over a wide range of magnetic fields, and is the most precise magnetic sensor on the market. It is the clear choice when a digital output signal is required of a magnetic sensor. Operate Point Error Band for Typical Magnetic Sensors (4.5V to 30V, -40C to +125C) Allegro 3141LLT (Hall Effect) Honeywell SS441A (Hall Effect) The GMR Switch Holds Tighter Operate Point Specifications Than Any Competing Product! Magnetic Operate Point (Gauss) NVE AD (GMR) NVE AD (GMR) 50 Honeywell 2SSP (AMR) NVE AD (GMR) NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

2 GMR Switch Precision Digital Sensors Quick Reference: GMR Switch Digital Sensors The following table lists some of NVE s most popular GMR Switch products and their key specifications: Part Number Typical Magnetic Operate Point (Oe 1 ) Typical Magnetic Release Point (Oe 1 ) Output Type 2 Maximum Operation Temperature ( C) Package Type 3 NVE AD Sink 125 SOIC8 NVE AD Sink 125 SOIC8 NVE AD Sink 125 MSOP8 NVE AD Sink 125 MSOP8 NVE AD Sink 125 MSOP8 NVE AD Source 125 MSOP8 NVE AD Sink MSOP8 Source NVE AD Sinks MSOP8 SCP NVE ADH Sink 150 MSOP8 Notes: 1. 1 Oersted (Oe) = 1 Gauss in air 2. Output Types: Sink = Up to 20mA current sink Source = Up to 20mA current source SCP = Short Circuit Protection available for external transistor 3. See Appendix for package dimensions Note on Availability of Products NVE keeps about 25 of the most popular types of GMR Switch products in stock at our manufacturing facility. However, because there are over 100 different varieties of GMR Switch parts, some part numbers may require a 6 to 8 week lead time before production quantities are available. Please contact NVE for further information. NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

3 GMR Switch Product Selection Guide GMR Switch Product Selection Guide NVE s GMR Switch is available in a wide range of packaging, output type, and magnetic trigger field varieties. The purpose of this selection guide is to explain the different output and packaging options, as well as to provide information on how to specify the correct part number when ordering. All NVE GMR Switch product part numbers follow the same general form. As shown below, the first x in the part number specifies output type and available voltage regulator output, the next two x s specify trigger field and direction of sensitivity, and the last pair specify the package type. The following sections define these variations in detail. NVE ADxxx-xx Output Type and Available Regulator Trigger Field, Direction of Sensitivity, Low Voltage Operation Package Type Output Type and Available Regulator The first numeric digit of the part number NVE ADxxx-xx specifies the output type, and the availability of a regulated voltage supply on a separate pin. The following four output types are available: 20 ma Current Sink 20 ma Current Source Separate 20 ma Sink and Source Two Separate 20 ma Sinks All outputs turn ON when the magnetic field is applied. An output that turns OFF when the magnetic field is applied is available as a custom product; please consult NVE. Some of NVE s GMR Switches also feature a regulated supply voltage available external to the part on a separate pin. This regulator provides a 5.8V reference capable of supplying up to 3 ma of drive current. This regulated output may be used to run an LED or other low power device. NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

4 GMR Switch Product Selection Guide In addition to these options, NVE recently introduced a GMR Switch that has provisions for shutting down an external power transistor in case a short circuit is detected. This is useful in applications where the finished sensor assembly must be bulletproof, or immune to improper connection. The following table defines the first digit in the NVE AD part number: NVE AD x xx-xx Number Meaning 0 20mA Current Sink 1 20 ma Current Source 2 Separate 20mA Current Sink and 20mA Current Source 3 Two Separate 20mA Current Sinks 4 20mA Current Sink + Regulated Output Voltage 5 20 ma Current Source + Regulated Output Voltage 6 Separate 20mA Current Sink and 20mA Current Source + Regulated Output Voltage 7 Two Separate 20mA Current Sinks + Regulated Output Voltage 8 Two Separate 20mA Current Sinks + Regulated Output Voltage + Short Circuit Detection and Shut-Off 9 Separate 20mA Current Sink and 20mA Current Source + Regulated Output Voltage + Short Circuit Detection and Shut-Off Trigger Field, Direction of Sensitivity, Low Voltage Operation The second and third numeric digits of the part number NVE ADxxx-xx specify the magnetic trigger field and direction of sensitivity of the part. Five different magnetic trigger fields are available for the GMR Switch: - 10 Gauss (10 Oe, 1.0 mt, 0.8 ka/m) - 20 Gauss (20 Oe, 2.0 mt, 1.6 ka/m) - 28 Gauss (28 Oe, 2.8 mt, 2.23 ka/m) - 40 Gauss (40 Oe, 4.0 mt, 3.2 ka/m) - 80 Gauss (80 Oe, 8.0 mt, 6.4 ka/m) Other magnetic trigger field levels ranging up to 250 Gauss are available on a custom basis; please contact NVE. NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

5 GMR Switch Product Selection Guide In addition to defining the magnetic operate point, these two digits are used to define the direction of sensitivity and optional low voltage operation. The GMR Switch can be ordered in Standard Axis or Cross Axis directions of sensitivity; for definitions please see NVE AD Series Sensitivity Direction and Pin Configuration later in this section. NVE also makes a GMR Switch with the on-chip voltage regulator bypassed. This limits the voltage range of the part, but allows it to operate at voltages as low as 3.0V. The following table defines the second and third digits in the NVE AD part number: NVE AD x xx-xx Number Meaning Gauss OP, Standard Direction of Sensitivity Gauss OP, Standard Direction of Sensitivity Gauss OP, Standard Direction of Sensitivity Gauss OP, Standard Direction of Sensitivity Gauss OP, Cross Axis Direction of Sensitivity Gauss OP, Cross Axis Direction of Sensitivity Gauss OP, Cross Axis Direction of Sensitivity Gauss OP, Cross Axis Direction of Sensitivity Gauss OP, Cross Axis Direction of Sensitivity (ADH Series Only; see page 38) Gauss OP, Cross Axis Direction of Sensitivity, Low Volt Gauss OP, Cross Axis Direction of Sensitivity, Low Volt Gauss OP, Cross Axis Direction of Sensitivity, Low Volt Gauss OP, Cross Axis Direction of Sensitivity, Low Volt Note: For parts that operate at 10 Gauss, see the following section describing the NVE ADH Series sensors. NVE AD Series Sensitivity Direction and Pin Configuration Pin configuration is for the NVE AD Series GMR Switches is given in the following diagrams. In addition, most GMR Switch parts are available with a choice of two directions of sensitivity. Standard direction of sensitivity is defined as the direction parallel to the edge of the package containing the pins. Cross-Axis direction of NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

6 GMR Switch Product Selection Guide sensitivity is defined as the direction perpendicular to the edge of the package containing the pins. Pin configuration and sensitivity direction for the SOIC8 and MSOP8 packages are defined in the drawings below: NVE AD0xx-xx through NVE AD7xx-xx, NVE ADH0xx-xx: N/C VCC VCC Sink(1) Source Sink(2) Standard Axis N/C* Vreg Source Sink(2) Cross Axis N/C* Vreg Ground Sink(1) N/C Ground Note: In the case of a Standard Axis Part with the Vreg pin option, Sink(1) will appear at the pin labelled N/C* NVE AD8xx-xx through NVE AD9xx-xx: Cap2 VCC Cap2 VCC Cap AD8xx-xx ShortH Cap AD9xx-xx ShortL Sink(2) Cross Axis Sink(1) Source Cross Axis Sink Ground Vreg Ground Vreg Pin configuration and sensitivity direction for the AD0xx-10 TDFN6 package are defined in the drawing below: VCC AD0xx-10 Out N/C AD0xx-10 VCC N/C N/C Cross Axis Test Ground N/C Ground Standard Axis N/C Out NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

7 Package Type GMR Switch Product Selection Guide NVE GMR Switches are available in three different packages: an SOIC 8 pin package, an MSOP 8 pin small outline package, and a TDFN 6 pin ultra-miniature package. Package drawings are shown in the Appendix. The following table defines the last two digits in the NVE AD part number: NVE AD x xx-xx Number Package Type 00 MSOP8 02 SOIC TDFN6 Note 1 : At this time, the TDFN6 package is only available in AD0xx-10 configuration. In addition to these three package types, NVE offers a custom version of the MSOP8 package for the NVE AD part. In this version, the BD012-00, all three connections are made on one side of the package, and the pins on the other side of the package are clipped off flush with the body of the package. This allows the user to position the sensing element as close to the edge of a circuit board or assembly as possible. A pinout of this package is shown below: VCC BD Cross Axis N/C* Out Ground The maximum length of the clipped leads is 0.30mm, leading to an overall package length of 4.25mm, as compared to 4.90mm for the normal MSOP8 package. This part is available in tape and reel format only. Other versions of the GMR Switch may be available in this package configuration on a special order basis. Please contact NVE for further information. NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

8 GMR Switch Product Selection Guide Characteristics Over Voltage and Temperature Typical Operate Points (OP) and Release Points (RP) AD004 and AD005 Applied Field (Oersteds) Ambient Temperature = 25C AD005 OP AD005 RP AD004 OP AD004 RP Supply Voltage Operate Point (OP) and Release Point (RP) Variation Over Temperature 50 Applied Field (Oe) Temperature (C) AD005 OP AD005 RP AD004 OP AD004 RP NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

9 GMR Switch Product Selection Guide Operating Temperature Derating Curves for SOIC8, MSOP8, and TDFN6 Packages in Free Air Temperature (C) Supply Voltage (V) SOIC8 MSOP8 and TDFN6 Maximum Output Current (ma) Output Current Derating Curve Supply Voltage (V) (Continues to 30V) NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

10 AD0xx-xx to AD7xx-xx AD0xx-xx to AD7xx-xx Features: Precision Magnetic Operate Point Excellent Temperature and Voltage Performance Digital Outputs Frequency Response 0 to 250KHz Optional Voltage Regulator Output Optional Low Voltage Version Small, Low Profile Surface Mount Packages Applications: General Digital Position Sensing Pneumatic Cylinder Position Sensing Speed Sensing Description: The NVE AD0xx-xx to AD7xx-xx GMR Switches are digital output magnetometers that offers precision operate points over all temperature and input voltage conditions. They are available with magnetic trigger fields from 20 to 80 Gauss, and four different output configurations, making them an extremely flexible and user-friendly design. Functional Block Diagram (NVE AD0xx-xx to NVE AD7xx-xx, Except NVE AD08x-xx): Voltage Regulator (5.8V) Current Sinking Output 4.5V to 30V GMR Bridge Comparator NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

11 Functional Block Diagram (NVE AD08x-xx): AD0xx-xx to AD7xx-xx 3.0V to 6.0V Current Sinking Output GMR Bridge Comparator Output Characteristic as a Function of Magnetic Field, for AD GMR Switch Output Current, ma (10V Supply, 1K Load Resistor) ON OFF OFF ON Applied Magnetic Field (Oe) Magnetic Characteristics: Typical Operate Point Minimum Operate Point Maximum Operate Point Minimum Differential 1, Note: All Values in Oersteds (Oe); 1 Oe = 1 Gauss in Air Maximum Differential 1,2 NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

12 AD0xx-xx to AD7xx-xx Electrical Specifications (NVE AD0xx-xx to NVE AD7xx-xx, except NVE AD08x-xx): Parameter Symbol Min Max Units Test Condition Supply Voltage 4 V CC V Operating Supply Current, Single Output I CC ma Output Off, V CC =12V Current Sinking Output 3 I O 0 20 ma 3 Operating Current Sourcing Output 3 I O 0 20 ma 3 Operating Output Leakage Current I LEAK 10 μa Output Off, V CC =12V Sinking Output Saturation Voltage V OL 0.4 V Output On, I OL =20mA Sourcing Output Saturation Voltage V OH V CC -2.5 V Output On, I OL =20mA Regulated Output Voltage 6 V REG V Operating Regulated Output Current I REG 3.0 ma Operating Electrical Specifications (NVE AD08x-xx): Parameter Symbol Min Max Units Test Condition Supply Voltage V CC V Operating Supply Current, Single Output I CC ma Output Off, V CC =3V Supply Current, Single Output I CC ma Output Off, V CC =6V Current Sinking Output 2 I O 0 20 ma 3 Operating Output Leakage Current I LEAK 10 μa Output Off, V CC =5V Sinking Output Saturation Voltage V OL 0.4 V Output On, I OL =20mA Absolute Maximum Ratings (NVE AD0xx-xx to NVE AD7xx-xx, except NVE AD08x-xx): Parameter Symbol Min Max Units Supply Voltage V CC 33 V Reverse Battery Voltage V RBP -33 V Current Sinking Output Off Voltage 33 V Current Sourcing Output Off Voltage 0 V Current Sinking Reverse Output Voltage -0.5 V Current Sourcing Reverse Output Voltage -0.5 V Continuous Output Current I 0 24 ma Operating Temperature Range 4 T A C Storage Temperature Range T S C Magnetic Field 5 H None Oe NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

13 AD0xx-xx to AD7xx-xx Absolute Maximum Ratings (NVE AD08x-xx): Parameter Symbol Min Max Units Supply Voltage V CC 7 V Reverse Battery Voltage V RBP -0.5 V Current Sinking Output Off Voltage 33 V Current Sinking Reverse Output Voltage -0.5 V Continuous Output Current I 0 24 ma Operating Temperature Range 4 T A C Storage Temperature Range T S C Magnetic Field 5 H None Oe Notes: 1. Differential = Operate Point Release Point 2. Minimum Release Point for AD0xx-xx to AD7xx-xx, except AD08x-xx, = 5 Oe. Minimum Release Point for AD08x-xx = 3.5 Oe. 3. Output current must be limited by a series resistor. Exceeding absolute maximum continuous output current ratings will result in damage to the part. See the figure in the GMR Switch Product Selection Guide for an output current derating curve. 4. Thermal power dissipation for the packages used by NVE is 240 C/Watt for the SOIC8 package, and 320 C/Watt for the MSOP8 and TDFN6 packages. See the Figure on Ambient Temperature vs. Supply Voltage for derating information. Heat sinking the parts by attaching them to a PCB improves temperature performance. 5. There is no maximum magnetic field that will cause damage to the device. 6. If V CC >6.6V, V REG =5.8V. If V CC <6.6V, V REG = V CC 0.9V. NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

14 AD8xx-xx to AD9xx-xx AD8xx-xx to AD9xx-xx Features: Short Circuit Detection and Shutoff of External Power Transistor Precision Magnetic Operate Point Excellent Temperature and Voltage Performance Digital Outputs Frequency Response 0 to 250KHz Small, Low Profile Surface Mount Packages Applications: General Digital Position Sensing Pneumatic Cylinder Position Sensing Speed Sensing Description: NVE AD8xx and AD9xx GMR Switches are designed specifically for use with an external high current output transistor in industrial control environments. These parts provide the same precise magnetic performance NVE s GMR Switch is known for, with the additional functionality of short circuit protection (SCP) for the output stage of the circuit. The protection circuit is designed to shut off the output stage when a short circuit condition exists; after a time interval specified by the user, the circuit turns back on. If the short circuit condition still exists, the output stage is again shut off and the cycle repeats. The use of this sensor, along with external reverse battery protection and overvoltage protection, results in a bulletproof sensor assembly. A functional block diagram of this sensor is shown below: VDD Vreg ShortH Comparator GMR Bridge Comparator Sink1 Cap2 SCP Turn On Delay Sink2 Cap Off State Timer Ground These digital sensors with SCP are available for use with current sinking or current sourcing outputs, in a range of magnetic field operate points. They are provided in an NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

15 AD8xx-xx to AD9xx-xx MSOP8 package, with the cross-axis direction of sensitivity. An LED driver to indicate the presence of the magnetic field is also standard on these products. An SOIC8 package and standard axis sensitivity are available on a special order basis. Typical Circuit Configuration: VDD Pin 1 Cap2 VDD R BIAS1 R SHORT Cap Sink2 AD ShortH Sink1 R BIAS2 Ground Vreg R LED Output t 2 Cap t 1 Cap VDD Pin 1 Cap2 VDD Cap Source AD ShortL Sink1 Ground Vreg Output t 2 Cap t 1 Cap R LED R BIAS2 R BIAS1 R SHORT NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

16 Output Transistor Current in Short Circuit mode: AD8xx-xx to AD9xx-xx Output Transistor Current in Short Circuit Current (ma) t 2 t 1 Time Notes: 1. The t 2 Cap is used to delay the startup of the SCP circuitry, in order to avoid triggering the SCP circuitry on normal startup transients: see t 2 on the graph above. Typical value is 16V, 0.001μF, for a 35μs delay. 2. The t 1 Cap is used to set the Off time of the SCP circuitry; see t 1 on the graph above. Typical value is 16V, 0.01μF, for a 15ms Off time. 3. The voltage across R SHORT is monitored by the IC; if this voltage exceeds 145mV (typical), the SCP circuitry is activated. Typical value of R SHORT is 0.47 Ohms, 1/16 watt. This will result in SCP circuitry turning on at about 300mA of output current. 4. R BIAS1 and R BIAS2 are used to bias the output transistor. Typical values for R BIAS1 and R BIAS2 are 16K and 3K, respectively, to supply 1mA drive to the output transistor. 5. R LED is sized for whatever LED current is required by the user; maximum of 3 ma. Magnetic Characteristics: Typical Operate Point Minimum Operate Point Maximum Operate Point Minimum Differential 1,2 Maximum Differential 1, Note: All Values in Oersteds (Oe); 1 Oe = 1 Gauss in Air NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

17 Electrical Specifications: AD8xx-xx to AD9xx-xx Parameter Symbol Min Max Units Test Condition Supply Voltage 4 V CC V Operating Supply Current I CC ma Output Off, V CC =12V Current Sinking Output 2 I O ma 3 Operating Current Sourcing Output 2 I O ma 3 Operating Output Leakage Current I LEAK 10 μa Output Off, V CC =12V Sinking Output Saturation Voltage V OL 0.4 V Output On, I OL =2mA Sourcing Output Saturation Voltage V OH V CC -2.0 V Output On, I OL =2mA Regulated Output Voltage 6 V REG V Operating Regulated Output Current I REG 3.0 ma Operating Short High Voltage ShortH V Output On Short Low Voltage ShortL V Output On Absolute Maximum Ratings: Parameter Symbol Min Max Units Supply Voltage V CC 33 V Reverse Battery Voltage V RBP -0.5 V Current Sinking Output Off Voltage 33 V Current Sourcing Output Off Voltage 0 V Current Sinking Reverse Output Voltage -0.5 V Current Sourcing Reverse Output Voltage -0.5 V Continuous Output Current I 0 5 ma Operating Temperature Range 4 T A C Storage Temperature Range T S C Magnetic Field 5 H None Oe Notes: 1. Differential = Operate Point Release Point 2. Minimum Release Point for AD8xx-xx to AD9xx-xx = 5 Oe. 3. Output current must be limited by a series resistor. Exceeding absolute maximum continuous output current ratings will result in damage to the part. 4. Thermal power dissipation for the packages used by NVE is 240 C/Watt for the SOIC8 package, and 320 C/Watt for the MSOP8 and TDFN6 packages. See the Figure on Ambient Temperature vs. Supply Voltage for derating information. Heat sinking the parts by attaching them to a PCB improves temperature performance. 5. There is no maximum magnetic field that will cause damage to the device. 6. If V CC >6.6V, V REG =5.8V. If V CC <6.6V, V REG = V CC 0.9V. NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

18 ADH0xx-xx Features: Precision Low Field Magnetic Operate Point Excellent Temperature and Voltage Performance Digital Output Frequency Response 0 to 250KHz Small, Low Profile Surface Mount Packages Applications: Low Field Digital Position Sensing Pneumatic Cylinder Position Sensing Speed Sensing Description: The NVE ADH0xx Series GMR Switch uses NVE s high sensitivity, high temperature GMR material to provide a very low magnetic field operate point. It offers the same precision operate points over all temperature and input voltage conditions as our other GMR Switch products. It is available in standard form as the NVE ADH with a magnetic trigger field of 10 Gauss, a current sinking output, and a cross axis configuration. Custom versions with trigger fields ranging from 6 to 40 Gauss, and different output options and sensitivity directions could be manufactured for specific customer requirements; please contact NVE for details. Note: Functional Block Diagram for the NVE ADH0xx-xx Series sensors is the same as for the NVE AD0xx-xx sensors. Output Characteristic as a Function of Magnetic Field, ADH Output Current, ma (10V Supply, 1K Load Resistor) ON OFF OFF ON Applied Magnetic Field (Oe) NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

19 Magnetic Characteristics, NVE ADH025-00: Typical Operate Point Minimum Operate Point Maximum Operate Point Minimum Differential Note: All Values in Oersteds (Oe); 1 Oe = 1 Gauss in Air Electrical Specifications, NVE ADH0xx-xx: Maximum Differential 1 Parameter Symbol Min Max Units Test Condition Supply Voltage 4 V CC V Operating Supply Current, Single Output I CC ma Output Off, V CC =12V Current Sinking Output 3 I O 0 20 ma 3 Operating Output Leakage Current I LEAK 10 μa Output Off, V CC =12V Sinking Output Saturation Voltage V OL 0.4 V Output On, I OL =20mA Absolute Maximum Ratings: Parameter Symbol Min Max Units Supply Voltage V CC 33 V Reverse Battery Voltage V RBP -33 V Current Sinking Output Off Voltage 33 V Current Sourcing Output Off Voltage 0 V Current Sinking Reverse Output Voltage -0.5 V Current Sourcing Reverse Output Voltage -0.5 V Continuous Output Current I 0 24 ma Operating Temperature Range 4 T A C Storage Temperature Range T S C Magnetic Field 5 H None Oe Notes: 1. Differential = Operate Point Release Point 2. Minimum Release Point for ADH0xx-xx = 2.0 Oe. 3. Output current must be limited by a series resistor. Exceeding absolute maximum continuous output current ratings will result in damage to the part. See the figure in the GMR Switch Product Selection Guide for an output current derating curve. 4. Thermal power dissipation for the packages used by NVE is 240 C/Watt for the SOIC8 package, and 320 C/Watt for the MSOP8 and TDFN6 packages. See the Figure on Ambient Temperature vs. Supply Voltage for derating information. Heat sinking the parts by attaching them to a PCB improves temperature performance. 5. There is no maximum magnetic field that will cause damage to the device. NVE Corporation Valley View Road, Eden Prairie, Minnesota USA (800) Web: info@nve.com 11/15/02

20 Data Sheet ADL-Series Nanopower Digital Switches Key Features Ultraminiature 1.1 mm x 1.1 mm x 0.45 mm ULLGA package Precise Detection of Low Magnetic Fields Low Voltage Operation to 2.4 V Typical Power Consumption As Low As 72 nw at 2.4 V Digital Switch Output Continuously Operating or Duty-Cycled Versions Description ADL-Series sensors are Giant Magnetoresistive (GMR) Digital Switches designed to run at low voltages and extremely low currents. The devices are manufactured with NVE s patented spintronic GMR technology for unmatched miniaturization, sensitivity, precision, and low power. NVE s new ULLGA leadless package measures just 1.1 mm x 1.1 mm x 0.45 mm. Bare die (0.625 mm x mm) are also available for extremely space-critical applications. Configured as a magnetic switch, the output turns on when the magnetic field is applied, and turns off when the field is removed. The applied magnetic field can be of either polarity, and the magnetic operate point is extremely stable over supply voltage and temperature. The ICs consist of a GMR sensor element, CMOS signal processing circuitry to convert the analog sensor element output to a digital output, and optional oscillator and timing circuitry for power management duty cycling. Internally duty cycled versions conserve power. Two different duty-cycle frequencies are available, offering a trade-off between update frequency and power consumption. An integrated latch ensures the output is available continuously. The continuously operating versions have a frequency response of 250 khz. ADL-Series Digital Switches are ideal for battery-powered devices such as gas and water meters, portable instruments, or anyplace where an extremely low power device is required. The continuously operating versions consume less than a milliwatt, and the duty-cycled versions consume less than a microwatt. The output is current-sinking and can sink up to 100 microamps. Versions of this part with different magnetic characteristics and duty-cycle update frequencies are available. Please contact NVE for details. SB February 2012 NVE Corporation Valley View Road, Eden Prairie, MN (952)

21 ADL-Series Nanopower Digital Switches Functional Block Diagrams V DD V DD Out Out Oscillator and Timing GMR Sensor Element Comparator GMR Sensor Element Comparator Latch Continuously-operating versions (ADL9xx) Duty-cycled versions (ADL0xx/ADL1xx) Operation The direction of magnetic field sensitivity is planar to the package. As the field varies in intensity, the digital output will turn on and off. The user must provide a pull-up resistor on the output terminal. Sensor Activation With a Permanent Magnet The diagrams below show two permanent magnet orientations that will activate the sensor in the direction of sensitivity (planar to the package): Magnet Magnet NVE Corporation Valley View Road, Eden Prairie, MN (952)

22 ADL-Series Nanopower Digital Switches Electrical and Magnetic Specifications (specifications valid over all operating voltage and temperature ranges): Parameter Min. Typ. Max. Units Magnetic Operate Point (ADLx21) Oersteds (1) Magnetic Operate Point (ADLx22) Oersteds (1) Magnetic Operate Point (ADLx24) Oersteds (1) Operate/Release Differential 2 14 Oersteds Operating Voltage (V DD ) Volts Quiescent Current at 2.4 V (ADL0xx) μa Quiescent Current at 2.4 V (ADL1xx) μa Quiescent Current at 2.4 V (ADL9xx) μa Quiescent Current at 3.6 V (ADL0xx) μa Quiescent Current at 3.6 V (ADL1xx) μa Quiescent Current at 3.6 V (ADL9xx) μa Peak Current During Sensor Sampling (3.0 V) μa Output Drive Current 100 μa V OL at 100 μa Output Drive Current (V DD = 3.6 V) 0.20 Volts Output Leakage Current μa Update Frequency (ADL0xx) Hz Update Frequency (ADL1xx) Hz Operating Frequency (ADL9xx) 250 khz Temperature Range of Operation C Absolute Maximum Ratings Parameter Rating Units Applied Magnetic Field Unlimited (2) Oersteds Supply Voltage 5.5 Volts Output Off Voltage 5.5 Volts Output Current 200 μa Maximum Junction Temperature +170 C Storage Temperature 65 to +170 C Notes: 1. 1 Oe (Oersted) = 1 Gauss in air = 0.1 mt 2. Large Magnetic Fields WILL NOT damage NVE GMR Sensors NVE Corporation Valley View Road, Eden Prairie, MN (952)

23 ADL-Series Nanopower Digital Switches Performance Over Temperature and Power Supply Range Average current increases, but remains extremely low, over variations in supply voltage. The magnetic operate and release points are very stable over temperature and supply voltage. Update frequency increases as supply voltage increases. Current (na) Average Current vs. Supply Voltage (Typical) Supply Voltage Applied Field (Oe) Operate and Release Points vs. Temperature (Typical; 3V Supply) Release Point Operate Point -30 Operate Point Temperature (ºC) Release Point 60 Frequency Response vs. Supply Voltage (Typical; 25ºC) 33 Operate Point vs. Supply Voltage (Typical; 25ºC) Update Frequency (Hz) Supply Voltage Magnetic Field (Oe) Supply Voltage NVE Corporation Valley View Road, Eden Prairie, MN (952)

24 Data Sheet Package Drawings, Dimensions, and Specifications: 4-Lead ULLGA Package 1.1 mm x 1.1 mm x 0.45 mm; Lead Pitch 0.65 mm Top View Side View Bottom View Direction of Sensitivity Dimensions in mm; ±0.10 mm Pinout: Pin 1 Pin 2 Pin 3 Pin 4 No Connect V DD Out Ground Part Numbering The following example shows the ADL-Series part-numbering system: ADL E Base Part ADL = Low hysteresis digital switch Duty Cycling 0 = 55 Hz duty cycled 1 = 30 Hz duty cycled 9 = Continuous Typ. Magnetic Operate Point 21 = 20 Oe 22 = 40 Oe 24 = 28 Oe Package Type 01 = mm x mm bare die 14E = 1.1 mm x 1.1 mm RoHS ULLGA NVE Corporation Valley View Road, Eden Prairie, MN (952)

25 ADL-Series Nanopower Digital Switches Package Marking Codes: Part Number Mark ADL021-14E V ADL022-14E * ADL024-14E C ADL121-14E * ADL122-14E * ADL124-14E D ADL921-14E * ADL922-14E * ADL924-14E * *Marking not yet assigned NVE Corporation All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. SB February 2012 NVE Corporation Valley View Road, Eden Prairie, MN (952)

26 ADL-Series Nanopower Digital Switches Datasheet Limitations The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE and customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an agreement be valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet. Limited Warranty and Liability Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Right to Make Changes NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product descriptions at any time and without notice. This document supersedes and replaces all information supplied prior to its publication. Use in Life-Critical or Safety-Critical Applications Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications and such inclusion or use is at the customer s own risk. Should the customer use NVE products for such application whether authorized by NVE or not, the customer shall indemnify and hold NVE harmless against all claims and damages. Applications Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for any assistance with applications or customer product design. It is customer s sole responsibility to determine whether the NVE product is suitable and fit for the customer s applications and products planned, as well as for the planned application and use of customer s third party customers. Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer s applications or products, or the application or use by customer s third party customers. The customer is responsible for all necessary testing for the customer s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or use by customer s third party customers. NVE accepts no liability in this respect. Limiting Values Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and Conditions of Sale In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects to applying the customer s general terms and conditions with regard to the purchase of NVE products by customer. No Offer to Sell or License Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Export Control This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. Automotive Qualified Products Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NVE s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond NVE s specifications such use shall be solely at customer s own risk, and (c) customer fully indemnifies NVE for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NVE s standard warranty and NVE s product specifications. NVE Corporation Valley View Road, Eden Prairie, MN (952)

27 ADV001 Sensors ADV001 Latching Bipolar Digital Switches Features: Latching bipolar operation (south field ON, north field OFF) Extremely low operate points for high sensitivity Digital switch output MSOP8 and TDFN6 packages Cannot be damaged by large magnetic fields Description: The ADV001 is a GMR Digital Switch product using a unique bipolar output GMR material. This material allows the sensor to maintain a negative (south pole) operate point and a positive (north pole) release point. The sensor is ideal for magnetic encoders with alternating north and south poles, or in any other application where one polarity of field is required to turn the part on and the opposite polarity is required to turn it off. The magnetic operate/release points are extremely low approximately 4 oersteds for the operate point and +4 oersteds for the release point. Despite the high sensitivity, the operate points are stable over a temperature range of 40 C to +125 C. The high sensitivity and excellent temperature stability give the ADV001 better airgap performance and switching precision than other products. The output is on/off current-sinking. The IC is available in an MSOP8 (part number ADV001-00E) or 2.5 mm x 2.5 mm TDFN6 package (part number ADV001-10E). The following specifications are valid over all operating voltage and temperature ranges: Parameter Min. Typ. Max. Units Magnetic Operate Point Oersteds Magnetic Release Point Oersteds Operate/Release Differential 2 12 Oersteds Operating Supply Voltage (V CC ) Volts Quiescent Supply Current (V CC = 12 V) ma Output Drive Current 0 20 ma V OL (V CC 5 V; 20 ma output sink current 2 ) Volts Frequency Response 100 KHz Temperature Range of Operation C Notes: 1. Other operate and release points are available; contact NVE for details. 2. V OL at V CC = 4.5 V may be higher than V. 3. Large magnetic fields WILL NOT damage NVE GMR Sensors Oe (Oersted) = 1 Gauss in air = 0.1 mt phone: fax:

28 ADV001 Sensors Functional Block Diagram and Pinout ADV001-00E Vcc Out Output N/C N/C GMR Sensor N/C N/C Direction of Sensitivity ( South ) N/C Ground Operation The end user must apply a magnetic field planar with the IC package in the direction of sensitivity of the part (the cross-axis direction). The part is configured for pull down operation when in the ON state. An external pull-up resistor is required. The following figures illustrate the switching operation: N S S al ti Co nfiden NVE N OFF OFF ON OFF ON ON OFF Figure A Figure B Figure C Figure D As a south magnetic field is applied to the pin 8 side of the sensor, the digital output will turn on (Figure B). A north magnetic field applied to the pin 1 side will also turn the output on. The output will remain latched on (Figure C) until an opposite field is applied (Figure D) phone: fax:

29 ADV001 Sensors Package Drawings and Specifications MSOP8 (ADV001-00E).118 (3.00).118 (3.00).193 (4.90) NVE XXX.118 (3.00).021 (.533).154 (3.91).012 TYP. Dimensions: inches (mm).034 (.86).040 (1.02).0256 (.65) X (.102) min.012 (.305) max Notes: 1. The MSOP8 package has thermal power dissipation of 320 C/Watt in free air. 2. Thermal performance is improved when the package is soldered to a circuit board. 2.5 mm x 2.5 mm TDFN6 (ADV001-10E) dimensions in mm Notes: 1. The TDFN6 package has thermal power dissipation of 320 C/Watt in free air. 2. Thermal performance is improved when the package is soldered to a circuit board phone: fax:

30 ADV001 Sensors Package Pinout MSOP8 (ADV001-00E) TDFN6 (ADV001-10E) V CC Pin 1 Pin 1 Ground Pin 5 Pin 4 Out Pin 8 Pin 6 NVE Corporation All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. SB phone: fax: February 2012

31 ADV001 Sensors Datasheet Limitations The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE and customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an agreement be valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet. Limited Warranty and Liability Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Right to Make Changes NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product descriptions at any time and without notice. This document supersedes and replaces all information supplied prior to its publication. Use in Life-Critical or Safety-Critical Applications Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications and such inclusion or use is at the customer s own risk. Should the customer use NVE products for such application whether authorized by NVE or not, the customer shall indemnify and hold NVE harmless against all claims and damages. Applications Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for any assistance with applications or customer product design. It is customer s sole responsibility to determine whether the NVE product is suitable and fit for the customer s applications and products planned, as well as for the planned application and use of customer s third party customers. Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer s applications or products, or the application or use by customer s third party customers. The customer is responsible for all necessary testing for the customer s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or use by customer s third party customers. NVE accepts no liability in this respect. Limiting Values Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and Conditions of Sale In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects to applying the customer s general terms and conditions with regard to the purchase of NVE products by customer. No Offer to Sell or License Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. Export Control This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. Automotive Qualified Products Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of nonautomotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NVE s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond NVE s specifications such use shall be solely at customer s own risk, and (c) customer fully indemnifies NVE for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NVE s standard warranty and NVE s product specifications phone: fax:

32 AFL Sensors AFL-Series Sensors Low Power, Low Voltage Digital Switches Features: Low voltage operation to 0.9 V Low current consumption Digital switch output Precise detection of low magnetic fields Ultra-small packages (MSOP8 and TDFN6) Available in millimeter-scale die Cannot be damaged by large magnetic fields Description: NVE s AFL-Series Sensors are digital switches designed to run at very low voltages and currents. The parts can operate from a single battery. The output is configured as a switch to detect magnetic fields, switching on at a specified magnetic field, and off when the field is removed. Current-sinking or current-sourcing output configurations are available. Both configurations supply up to 100 µa. An external pull-up or pull-down resistor is required. The devices are available in MSOP8 or TDFN6 packages, or in die form. AFL Product Selection Guide AFL-Series part numbers follow the general form below. The first x in the part number specifies the voltage range, the second x denotes the output configuration, the third x specifies the magnetic operate point, and the last character pair specifies the package. The following sections define these options. AFLxxx-xx Voltage Range of Operation Output Magnetic Operate Point Package Type phone: fax:

33 AFL Sensors Voltage Range of Operation The first numeric digit of the part number in the form AFLxxx-xx specifies the operating voltage range. Four ranges are available: NVE AFL xxx-xx Number Voltage Range of Operation V 1.3 V V 2.5 V V 3.6 V V 5.5 V The quiescent supply current specifications apply within these ranges. Parts may be operated at higher voltage than shown up to a maximum of 7 V, but the quiescent current will increase. For example, a 1xx-xx part can be operated up to 3.0 V although it might it exceed the quiescent current specification. NVE can supply custom parts for different voltage ranges. Minimum order quantities, special pricing, NRE charges, and lead times may apply. Please contact NVE with your requirements. Output The second digit of the part number specifies the output configuration. Four output types are available: NVE AFL xxx-xx Number Output Type 0 Normally Off, Current Sink 1 Normally On, Current Sink 2 Normally On, Current Source 3 Normally Off, Current Source Normally Off means that with no magnetic field applied the output will not provide current; when the magnetic field is applied, the output current will turn on. Normally On is opposite. Parts will sink or source up to 100 µa. Output current is not included in the quiescent current specification phone: fax:

34 AFL Sensors Magnetic Operate Point and Direction of Sensitivity Standard magnetic operate points are shown in the table below. Non-standard magnetic operate points are available, but special pricing, minimum order quantities, NRE charges, and lead times may apply. NVE AFL xxx-xx Number Magnetic Operate Point 0 10 Oe 1 20 Oe 2 28 Oe 3 40 Oe 4 80 Oe 5 7 Oe All AFL-Series parts feature cross-axis sensitivity as shown in the following diagrams: VCC Output VCC Output Test Test Test Cross Axis MSOP 8 Ground N/C Test Test Test Cross Axis TDFN 6 Ground Test Package Types AFL-Series parts are available in two different packages: an 8-pin Micro Small Outline Package (MSOP) and a 6-pin ultra-miniature leadless TDFN package. Parts are also available in die form. Package type part numbers are shown in the table below; drawings are at the end of this specification. NVE AFL xxx-xx Number Package Type 00 MSOP8 01 IC Only 10 TDFN6 Available Parts The following parts in this series are currently available: AFL000-00E AFL000-10E AFL AFL001-10E AFL002-10E AFL005-10E AFL020-00E AFL030-00E AFL100-00E AFL100-10E AFL AFL200-00E AFL300-00E Notes: 1. Part types are continuosly added. Contact factory for current part availability. 2. The E suffix indicates a lead-free, RoHS-compliant package. 3. All die versions (-01 suffix) are lead-free and RoHS compliant. phone: fax:

35 AFL Sensors Electrical and Magnetic Specifications Parameter Min. Typ. Max. Units Magnetic Operate Point (AFLxx0-xx) Oersteds Operate/Release Differential (AFLxx0-xx) 1 6 Oersteds Magnetic Operate Point (AFLxx1-xx) Oersteds Operate/Release Differential (AFLxx1-xx) 3 10 Oersteds Magnetic Operate Point (AFLxx2-xx) Oersteds Operate/Release Differential (AFLxx2-xx) 3 10 Oersteds Magnetic Operate Point (AFLxx5-xx) Oersteds Operate/Release Differential (AFLxx5-xx) 1 6 Oersteds Operating Voltage (AFL0xx-xx) Volts Operating Voltage (AFL1xx-xx) Volts Operating Voltage (AFL2xx-xx) Volts Operating Voltage (AFL3xx-xx) Volts Quiescent Current (AFL000-xx) μa Quiescent Current (AFL020-xx) μa Quiescent Current (AFL030-xx) μa Quiescent Current (AFL100-xx) μa Quiescent Current (AFL200-xx) μa Quiescent Current (AFL300-xx) μa Maximum Output Drive Current (Sink or Source) 100 μa V OL at 100 μa Output Drive Current Volts V OH at 100 μa Output Drive Current V CC Volts Frequency Response 100 KHz Temperature Range of Operation C Notes: 1. Large magnetic fields WILL NOT damage NVE GMR Sensors 2. One Oersted (Oe) = 1 Gauss in air = 0.1 mt phone: fax:

36 AFL Sensors Operation The magnetic field must be applied planar to the package in the direction of sensitivity. When the magnetic field reaches the magnetic operate point, the output will turn on. There should be a pull-up or pull-down resistor on the output terminal. Fuctional Diagrams and Pinout VCC (Pin 1) AFL Output N/C Ground GMR Bridge Test Test Test Test Direction of Sensitivity VCC (Pin 1) Output AFL Test GMR Bridge Ground Test Test phone: fax:

37 AFL Sensors IC Drawing and Layout The IC is approximately 1.45 mm x 1.5 mm. A die drawing is shown below: Direction of Sensitivity phone: fax: