Dual Low Power 1.5% Comparator With 400 mv Reference ADCMP670

Size: px

Start display at page:

Download "Dual Low Power 1.5% Comparator With 400 mv Reference ADCMP670"

Darren Lewis
6 years ago
Views:

1 Dual Low Power.5% Comparator With mv Reference ADCMP67 FEATURES FUNCTIONAL BLOCK DIAGRAM mv ±.5% threshold Supply range:.7 V to 5.5 V Low quiescent current: 6.5 μa typical Input range includes ground Internal hysteresis: 8.9 mv typical Low input bias current: ± na maximum Open-drain outputs Supports wire-and connections Input polarities: one inverting and one noninverting Low profile ( mm) TSOT package Drop-in replacement for the LT67- +INA INB V DD ADCMP67- mv GND Figure. OUTA OUTB 693- APPLICATIONS Li-Ion monitoring Portable applications Hand-held instruments Window comparators LED/relay driving Optoisolator driving Control systems GENERAL DESCRIPTION The ADCMP67 consists of two low power, high accuracy, comparator and reference circuits in a 6-lead TSOT package. The internal mv reference provides the ability to monitor low voltage supplies. The device operates on a supply voltage from.7 V to 5.5 V and draws only 6.5 μa typical, making it suitable for low power system monitoring and portable applications. Hysteresis is included in the comparators. The comparator outputs are open-drain and the output can be pulled up to any voltage up to 5.5 V. The output stage is guaranteed to sink greater than 5 ma over temperature. THRESHOLD VOLTAGE (mv) A B 2A 2B RISING INPUT FALLING INPUT The ADCMP67 is currently available in one model, the ADCMP67-. This model has one inverting input and one noninverting input, making it suitable for use as a window comparator. The device is suitable for portable, commercial, industrial, and automotive applications. 388 TWO TYPICAL PARTS COMP A AND COMP B TEMPERATURE ( C) Figure 2. Comparator Thresholds vs. Temperature Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. On e Technology Way, P.O. Box 96, Norwood, MA , U.S.A. Tel: Fax: Analog Devices, Inc. All rights reserved.

2 TABLE OF CONTENTS Features... Applications... Functional Block Diagram... General Description... Revision History... 2 Specifications... 3 Absolute Maximum Ratings... 6 Thermal Resistance... 6 ESD Caution... 6 Pin Configuration and Function Descriptions... 7 Typical Performance Characteristics...8 Application Information... 3 Comparators and Internal Reference... 3 Power Supply... 3 Inputs... 3 Outputs... 3 Adding Hysteresis... 3 Outline Dimensions... Ordering Guide... REVISION HISTORY 7/9 Rev. to Rev. A Changes to Figure /7 Revision : Initial Version Rev. A Page 2 of 6

3 SPECIFICATIONS VDD =.7 V to 5.5 V, TA = 25 C, unless otherwise noted. Table. Parameter Min Typ Max Unit Test Conditions/Comments THRESHOLDS Rising Input Threshold Voltage 39 6 mv VDD =.7 V mv VDD = 5.5 V Falling Input Threshold Voltage mv VDD =.7 V mv VDD = 5.5 V Hysteresis = VTH(R) VTH(F) mv INPUT CHARACTERISTICS Input Bias Current. na VDD =.7 V, VIN = VDD na VDD =.7 V, VIN =. V OPEN-DRAN OUTPUTS Output Low Voltage 2 2 mv VDD =.7 V, IOUT = 3 ma 3 2 mv VDD = 5.5 V, IOUT = 5 ma Output Leakage Current 3..8 μa VDD =.7 V, VOUT = VDD..8 μa VDD =.7 V, VOUT = 5.5 V DYNAMIC PERFORMANCE 2, High-to-Low Propagation Delay μs VDD = 5.5 V, VOL = mv Low-to-High Propagation Delay 8 μs VDD = 5.5 V, VOH =.9 VDD Output Rise Time.5 μs VDD = 5.5 V, VO = (. to.9) VDD Output Fall Time.7 μs VDD = 5.5 V, VO = (. to.9) VDD POWER SUPPLY Supply Current μa VDD =.7 V 6.5 μa VDD = 5.5 V RL = kω, VO = 2 V swing. 2 mv input overdrive. 3 VIN = mv overdrive. RL = kω. 5 No load current. Rev. A Page 3 of 6

4 VDD =.7 V to 5.5 V, C TA 7 C, unless otherwise noted. Table 2. Parameter Min Typ Max Unit Test Conditions/Comments THRESHOLDS Rising Input Threshold Voltage 39 9 mv VDD =.7 V mv VDD = 5.5 V Falling Input Threshold Voltage mv VDD =.7 V mv VDD = 5.5 V Hysteresis = VTH(R) VTH(F) mv INPUT CHARACTERISTICS Input Bias Current 5 na VDD =.7 V, VIN = VDD 5 na VDD =.7 V, VIN =. V OPEN-DRAIN OUTPUTS Output Low Voltage 2 25 mv VDD =.7 V, IOUT = 3 ma 25 mv VDD = 5.5 V, IOUT = 5 ma Output Leakage Current 3 μa VDD =.7 V, VOUT = VDD μa VDD =.7 V, VOUT = 5.5 V POWER SUPPLY Supply Current 3 μa VDD =.7 V μa VDD = 5.5 V RL = kω, VO = 2 V swing. 2 mv input overdrive. 3 VIN = mv overdrive. No load. VDD =.7 V to 5.5 V, C TA 85 C, unless otherwise noted. Table 3. Parameter Min Typ Max Unit Test Conditions/Comments THRESHOLDS Rising Input Threshold Voltage 39 mv VDD =.7 V mv VDD = 5.5 V Falling Input Threshold Voltage mv VDD =.7 V mv VDD = 5.5 V Hysteresis = VTH(R) VTH(F) mv INPUT CHARACTERISTICS Input Bias Current 5 na VDD =.7 V, VIN = VDD 5 na VDD =.7 V, VIN =. V OPEN-DRAIN OUTPUTS Output Low Voltage 2 25 mv VDD =.7 V, IOUT = 3 ma 25 mv VDD = 5.5 V, IOUT = 5 ma Output Leakage Current 3 μa VDD =.7 V, VOUT = VDD μa VDD =.7 V, VOUT = 5.5 V POWER SUPPLY Supply Current μa VDD =.7 V 5 μa VDD = 5.5 V RL = kω, VO = 2 V swing. 2 mv input overdrive. 3 VIN = mv overdrive. No load. Rev. A Page of 6

5 VDD =.7 V to 5.5 V, C TA 25 C, unless otherwise noted. Table. Parameter Min Typ Max Unit Test Conditions/Comments THRESHOLDS Rising Input Threshold Voltage 39 mv VDD =.7 V 392 mv VDD = 5.5 V Falling Input Threshold Voltage mv VDD =.7 V mv VDD = 5.5 V Hysteresis = VTH(R) VTH(F) mv INPUT CHARACTERISTICS Input Bias Current 5 na VDD =.7 V, VIN = VDD 5 na VDD =.7 V, VIN =. V OPEN-DRAIN OUTPUTS Output Low Voltage 2 25 mv VDD =.7 V, IOUT = 3 ma 25 mv VDD = 5.5 V, IOUT = 5 ma Output Leakage Current 3 μa VDD =.7 V, VOUT = VDD μa VDD =.7 V, VOUT = 5.5 V POWER SUPPLY Supply Current 6 μa VDD =.7 V 7 μa VDD= 5.5 V RL = kω, VO = 2 V swing. 2 mv input overdrive. 3 VIN = mv overdrive. No load. Rev. A Page 5 of 6

6 ABSOLUTE MAXIMUM RATINGS Table 5. Parameter VDD +INA, INB OUTA, OUTB Output Short Circuit Duration Input Current Operating Temperature Range Storage Temperature Range Lead Temperature Soldering ( sec) 3 C Vapor Phase (6 sec) 25 C Infrared (5 sec) 22 C Range.3 V to +6 V.3 V to +6 V.3 V to +6 V Indefinite ma C to +25 C 65 C to +5 C THERMAL RESISTANCE θja is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 6. Thermal Resistance Package Type θja Unit 6-Lead TSOT 2 C/W ESD CAUTION When the output is shorted indefinitely, the use of a heat sink may be required to keep the junction temperature within the absolute maximum ratings. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Rev. A Page 6 of 6

7 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS OUTA 6 OUTB ADCMP67- GND 2 TOP VIEW 5 V DD (Not to Scale) +INA 3 INB Figure 3. Pin Configuration Table 7. Pin Function Descriptions Pin No. Mnemonic Description OUTA Open-Drain Output for Comparator A. 2 GND Ground. 3 +INA Monitors analog input voltage on Comparator A. Connected to noninverting input. The other input of Comparator A is connected to a mv reference. INB Monitors analog input voltage on Comparator B. Connected to inverting input. The other input of Comparator B is connected to a mv reference. 5 VDD Power Supply Pin. 6 OUTB Open-Drain Output for Comparator B. Rev. A Page 7 of 6

8 TYPICAL PERFORMANCE CHARACTERISTICS 6 5 T A = 25 C 5 T A = 25 C PERCENT OF UNITS (%) 3 2 PERCENT OF UNITS (%) RISING INPUT THRESHOLD VOLTAGE (mv) FALLING INPUT THRESHOLD VOLTAGE (mv) Figure. Distribution of Rising Input Threshold Voltage Figure 7. Distribution of Falling Input Threshold Voltage PERCENT OF UNITS (%) T A = 25 C RISING INPUT THRESHOLD VOLTAGE (mv) V DD =.8V V DD = 5.V HYSTERESIS (mv) TEMPERATURE ( C) Figure 5. Distribution of Hysteresis Figure 8. Rising Input Threshold Voltage vs. Temperature RISING INPUT THRESHOLD VOLTAGE (mv) FOUR TYPICAL PARTS RISING INPUT THRESHOLD VOLTAGE (mv) TEMPERATURE ( C) Figure 6. Rising Input Threshold Voltage vs. Temperature SUPPLY VOLTAGE (V) Figure 9. Rising Input Threshold Voltage vs. Supply Voltage Rev. A Page 8 of 6

9 HYSTERESIS (mv) A B 2A 2B TEMPERATURE ( C) FOUR TYPICAL PARTS 693- HYSTERESIS (mv) V DD =.8V V DD = 5.V TEMPERATURE ( C) Figure. Hysteresis vs. Temperature Figure 3. Hysteresis vs. Temperature 2 HYSTERESIS (mv) THRESHOLD SHIFT (mv) SUPPLY VOLTAGE (V) Figure. Hysteresis vs. Supply Voltage SUPPLY VOLTAGE (V) Figure. Minimum Supply Voltage 693- NO LOAD CURRENT 5 9 SUPPLY CURRENT (µa) SUPPLY VOLTAGE (V) Figure 2. Quiescent Supply Current vs. Supply Voltage SUPPLY CURRENT (µa) SUPPLY VOLTAGE (V) Figure 5. Startup Supply Current Rev. A Page 9 of 6

10 V DD = 5.V V DD =.7V T A = 25 C V DD = 5.V V DD =.7V SUPPLY CURRENT (µa) SUPPLY CURRENT (µa)... OUTPUT SINK CURRENT (ma) OUTPUT SINK CURRENT (ma) Figure 6. Supply Current vs. Output Sink Current Figure 9. Supply Current vs. Output Sink Current T A = 85 C V DD = 5.V V DD =.7V k k CURRENT IS GOING OUT OF THE DEVICE..3V < V IB < V SUPPLY CURRENT (µa) INPUT BIAS CURRENT (na)... OUTPUT SINK CURRENT (ma) INPUT VOLTAGE (V) Figure 7. Supply Current vs. Output Sink Current Figure 2. Below Ground Input Bias Current 3 INPUT BIAS CURRENT (na) 3 5 CURRENT IS POSITIVE GOING INTO THE DEVICE. V < V IB < V INPUT VOLTAGE (V) INPUT BIAS CURRENT (na). CURRENT IS GOING INTO THE DEVICE V IB > V. 2 3 INPUT VOLTAGE (V) Figure 8. Low Level Input Bias Current Figure 2. High Level Input Bias Current Rev. A Page of 6

11 OUTPUT SATURATION VOLTAGE (mv) T A = 25 C V DD = 5.V V DD =.8V OUTPUT SATURATION VOLTAGE (mv) V DD = 5.V V DD =.8V... OUTPUT SINK CURRENT (ma) OUTPUT SINK CURRENT (ma) Figure 22. Output Saturation Voltage vs. Output Sink Current Figure 25. Output Saturation Voltage vs. Output Sink Current OUTPUT SATURATION VOLTAGE (mv) T A = 85 C V DD = 5.V V DD =.8V SHORT-CIRCUIT CURRENT (ma) OUTPUT SINK CURRENT (ma) OUTPUT VOLTAGE (V) Figure 23. Output Saturation Voltage vs. Output Sink Current Figure 26. Output Short-Circuit Current 7 T A = 25 C V DD = 5.V SHORT-CIRCUIT CURRENT (ma) V DD =.8V OUTPUT LEAKAGE CURRENT (na).. 2 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Figure 2. Output Short-Circuit Current Figure 27. Output Leakage Current Rev. A Page of 6

12 PROPAGATION DELAY (µs) T A = 25 C LH NONINV LH INV HL NONINV HL INV RISE AND FALL TIMES (µs). C L = 2pF T A = 25 C RISE FALL INPUT OVERDRIVE (mv) Figure 28. Propagation Delay vs. Input Overdrive OUTPUT PULL-UP RESISTOR (kω) Figure 3. Rise and Fall Times vs. Output Pull-Up Resistor NON INV (OUTA) 2 INV (OUTB) 3 V IN (+INA, INB) CH 5.mV CH3 5.V CH2 5.V M2.µs CH 7mV Figure 29. Noninverting and Inverting Comparators Propagation Delay Rev. A Page 2 of 6

13 APPLICATION INFORMATION The ADCMP67 is a dual low power comparator with a built-in mv reference that operates from.7 V to 5.5 V. The comparator is.5% accurate with a built-in hysteresis of 8.9 mv. The outputs are open-drain, capable of sinking ma. COMPARATORS AND INTERNAL REFERENCE Each comparator has one input available externally. Comparator A has a noninverting input and Comparator B has an inverting input available. The other comparator inputs are connected internally to the mv reference. The rising input threshold voltage of the comparators is designed to be equal to that of the reference. POWER SUPPLY The ADCMP67 is designed to operate from.7 V to 5.5 V. A. μf decoupling capacitor is recommended between VDD and GND. INPUTS The comparator inputs are limited to the maximum VDD voltage range. The voltage on these inputs can be above VDD but never above the maximum allowed VDD voltage. When adding a resistor string to the input, care must be taken when choosing resistor values. This is due to the fact that the input bias current will be in parallel with the bottom resistor of the string. This bottom resistor must therefore be chosen first to control the error introduced by this bias current. OUTPUTS The comparator outputs are open-drain and are also limited to the maximum specified VDD voltage range, regardless of the VDD voltage. These outputs are capable of sinking up to ma. Outputs can be tied together to provide a window comparator with a single output. ADDING HYSTERESIS To prevent oscillations at the output caused by noise or slowly moving signals passing the switching threshold, each comparator has built-in hysteresis of approximately 8.9 mv. Positive feedback can be used to increase hysteresis to the noninverting comparator. Rev. A Page 3 of 6

14 OUTLINE DIMENSIONS 2.9 BSC.6 BSC BSC 2 3 PIN INDICATOR.95 BSC.9 BSC * *. MAX.2.8. MAX.5.3 SEATING PLANE *COMPLIANT TO JEDEC STANDARDS MO-93-AA WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS. Figure Lead Thin Small Outline Transistor Package [TSOT] (UJ-6) Dimensions shown in millimeters 288-A ORDERING GUIDE Model Temperature Range Package Description Package Option Branding ADCMP67-YUJZ-RL7 C to +25 C 6-Lead Thin Small Outline Transistor Package [TSOT] UJ-6 M97 Z = RoHS Compliant Part. Rev. A Page of 6

15 NOTES Rev. A Page 5 of 5

Single 0.275% Comparator and Reference with Dual Polarity Outputs ADCMP361

Single 0.275% Comparator and Reference with Dual Polarity Outputs ADCMP361 Data Sheet FEATURES mv ±.275% threshold Supply range:.7 V to 5.5 V Low quiescent current: 6.5 µa typical Input range includes ground Internal hysteresis: 9.3 mv typical Low input bias current: ±5 na maximum