Single 0.275% Comparator and Reference with Dual Polarity Outputs ADCMP361
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1 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 Dual open-drain outputs Small SOT-23 package Qualified for automotive applications APPLICATIONS Li-Ion monitoring Threshold detectors Relay driving Optoisolator driving Industrial control systems Handheld instruments Single.275% Comparator and Reference with Dual Polarity Outputs ADCMP36 FUNCTIONAL BLOCK DIAGRAM IN mv V DD ADCMP36 GND Figure GENERAL DESCRIPTION The ADCMP36 is a single low power, high accuracy comparator with a mv reference in a 5-lead SOT-23 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 only draws 6.5 µa typical, making it suitable for low power system monitoring and portable applications. Hysteresis is included in the comparators. There are dual open-drain outputs to enable the comparator and reference circuit to be used in an inverting or noninverting configuration. The outputs can be pulled to any voltage up to a maximum of 5.5 V. The output stage is guaranteed to sink greater than 5 ma over temperature The device is suitable for portable, commercial, industrial, and automotive applications. 3V Li-Ion CELL R.7MΩ V DD ADCMP36 IN + + R2 MΩ C nf mv GND Figure 2. Typical Li-Ion Monitoring Application V BATT 2.28V 2.27V DISCHARGING CHARGING R3 MΩ V Figure 3. Li-Ion Monitoring Waveforms Rev. B Document Feedback 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. One Technology Way, P.O. Box 96, Norwood, MA , U.S.A. Tel: Analog Devices, Inc. All rights reserved. Technical Support
2 ADCMP36 TABLE OF CONTENTS Features... Applications... Functional Block Diagram... General Description... Revision History... 2 Specifications... 3 Absolute Maximum Ratings... Thermal Characteristics... ESD Caution... Pin Configuration and Function Descriptions... 5 Data Sheet Typical Performance Characteristics...6 Application Information... Comparators and Internal Reference... Power Supply... Inputs... Outputs... Adding Hysteresis... Outline Dimensions... 2 Ordering Guide... 2 Automotive Products... 2 REVISION HISTORY 5/ Rev. A to Rev. B Changes to Adding Hysteresis Section and Added Figure 32; Renumbered Sequentially... 3/ Rev. to Rev. A Changes to Features Section... Changes to Adding Hysteresis Section... Added Figure 3, Renumbered Sequentially... Updated Outline Dimensions... 2 Changes to Ordering Guide... 2 Added Automotive Products Section /7 Revision : Initial Version Rev. B Page 2 of 2
3 Data Sheet ADCMP36 SPECIFICATIONS 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 mv VDD = 3.3 V, TA = 25 C mv VDD =.7 V mv VDD = 3.3 V mv VDD = 5.5 V Falling Input Threshold Voltage mv VDD =.7 V mv VDD = 3.3 V mv VDD = 5.5 V Hysteresis = VTH(R) VTH(F) mv Threshold Voltage Accuracy ±.275 % TA = 25 C, VDD = 3.3 V Threshold Voltage Temperature Coefficient 6 ppm/ C POWER SUPPLY Supply Current µa VDD =.7 V 7. µa VDD = 5.5 V INPUT CHARACTERISTICS Input Bias Current. 5 na VDD =.7 V, VIN = VDD. 5 na VDD =.7 V, VIN =. V OPEN-DRAIN PUTS Output Low Voltage 2 22 mv VDD =.7 V, I = 3 ma 22 mv VDD = 5.5 V, I = 5 ma Output Leakage Current 3. µa VDD =.7 V, V = VDD. µa VDD =.7 V, V = 5.5 V DYNAMIC PERFORMANCE High-to-Low Propagation Delay 2, µs VDD = 5 V, VOL = mv Low-to-High Propagation Delay 2, 8 µs VDD = 5 V, VOH =.9 VDD Output Rise time 2,.5 µs VDD = 5 V, VO = (. to.9) VDD Output Fall time 2,.7 µs VDD = 5 V, VO = (. to.9) VDD RL = kω, VO = 2 V swing. 2 mv input overdrive. 3 VIN = mv overdrive. RL = kω. Rev. B Page 3 of 2
4 ADCMP36 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter VDD IN, Rating.3 V to +6 V.3 V to +6 V.3 V to +6 V Operating Temperature Range C to +25 C Storage Temperature Range 65 C to +5 C Lead Temperature Soldering ( sec) 3 C Vapor Phase (6 sec) 25 C Infrared (5 sec) 22 C THERMAL CHARACTERISTICS Data Sheet θja is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 3. Thermal Resistance Package Type θja Unit 5-Lead SOT-23 2 C/W ESD CAUTION 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. B Page of 2
5 Data Sheet ADCMP36 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 5 GND 2 ADCMP36 TOP VIEW (Not to Scale) IN 3 V DD Figure. Pin Configuration Table. Pin Function Descriptions Pin No. Mnemonic Description Noninverting Open-Drain Output. 2 GND Ground. 3 IN Monitors analog input voltage on comparator. The other input of the comparator is connected to a mv reference. VDD Power Supply. 5 Inverting Open-Drain Output. Rev. B Page 5 of 2
6 ADCMP36 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS PERCENT OF UNITS (%) 3 2 PERCENT OF UNITS (%) RISING INPUT THRESHOLD VOLTAGE (mv) FALLING INPUT THRESHOLD VOLTAGE (mv) Figure 5. Distribution of Rising Input Threshold Voltage Figure 8. Distribution of Falling Input Threshold Voltage PERCENT OF UNITS (%) RISING INPUT THRESHOLD VOLTAGE (mv) FOUR TYPICAL PARTS HYSTERESIS (mv) TEMPERATURE ( C) Figure 6. Distribution of Hysteresis Figure 9. Rising Input Threshold Voltage vs. Temperature RISING INPUT THRESHOLD VOLTAGE (mv) SUPPLY VOLTAGE (V) HYSTERESIS (mv) V DD =.8V V DD = 5.V TEMPERATURE ( C) 696- Figure 7. Rising Input Threshold Voltage vs. Supply Voltage Figure. Hysteresis vs. Temperature Rev. B Page 6 of 2
7 Data Sheet ADCMP36 2 HYSTERESIS (mv) THRESHOLD SHIFT (mv) SUPPLY VOLTAGE (V) Figure. Hysteresis vs. Supply Voltage SUPPLY VOLTAGE (V) Figure. Minimum Supply Voltage 696- NO LOAD CURRENT 5 9 SUPPLY CURRENT (ma) SUPPLY VOLTAGE (V) SUPPLY CURRENT (µa) SUPPLY VOLTAGE (V) Figure 2. Quiescent Supply Current vs. Supply Voltage Figure 5. Start-Up Supply Current V DD = 5.V V DD =.7V V DD = 5.V V DD =.7V SUPPLY CURRENT (µa) SUPPLY CURRENT (µa)... PUT SINK CURRENT (ma) PUT SINK CURRENT (ma) 696- Figure 3. Supply Current vs. Output Sink Current Figure 6. Supply Current vs. Output Sink Current Rev. B Page 7 of 2
8 ADCMP36 Data Sheet T A = 85 C V DD = 5.V V DD =.7V k k CURRENT IS GOING OF THE DEVICE..3V < V IB < V SUPPLY CURRENT (µa) INPUT BIAS CURRENT (na)... PUT 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 PUT SATURATION VOLTAGE (mv) V DD = 5.V V DD =.8V PUT SATURATION VOLTAGE (mv) V DD = 5.V V DD =.8V... PUT SINK CURRENT (ma) PUT SINK CURRENT (ma) Figure 9. Output Saturation Voltage vs. Output Sink Current Figure 22. Output Saturation Voltage vs. Output Sink Current Rev. B Page 8 of 2
9 Data Sheet ADCMP36 PUT SATURATION VOLTAGE (mv) T A = 85 C V DD = 5.V V DD =.8V SHORT-CIRCUIT CURRENT (ma) PUT SINK CURRENT (ma) PUT VOLTAGE (V) Figure 23. Output Saturation Voltage vs. Output Sink Current Figure 26. Short-Circuit Current vs. Output Voltage 7 V DD = 5.V SHORT-CIRCUIT CURRENT (ma) V DD =.8V PUT LEAKAGE CURRENT (na).. 2 PUT VOLTAGE (V) Figure 2. Short-Circuit Current vs. Output Voltage PUT VOLTAGE (V) Figure 27. Output Leakage Current vs. Output Voltage PROPAGATION DELAY (µs) LH NONINV LH INV HL NONINV HL INV RISE AND FALL TIMES (µs). C L = 2pF RISE FALL INPUT OVERDRIVE (mv) Figure 25. Propagation Delay vs. Input Overdrive PUT PULL-UP RESISTOR (kω) Figure 28. Rise and Fall Times vs. Output Pull-Up Resistor Rev. B Page 9 of 2
10 ADCMP36 Data Sheet NON INV (A) 2 INV (B) 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. B Page of 2
11 Data Sheet APPLICATION INFORMATION The ADCMP36 is a low power comparator and reference circuit featuring a mv reference that operates from.7 V to 5.5 V. The comparator is.275% accurate with a built-in hysteresis of 9.3 mv. There are two outputs, one the inverse of the other. This enables the ADCMP36 to be used as an inverting or a noninverting comparator circuit. These opendrain outputs are capable of sinking ma. COMPARATORS AND INTERNAL REFERENCE The comparator has one input available externally; the other comparator input is 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 ADCMP36 is designed to operate from.7 V to 5.5 V. A nf decoupling capacitor is recommended between VDD and GND. INPUTS The comparator input is 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, take care when choosing resistor values. This is due to the fact that the input bias current will be in parallel with the bottom resistor, R2, of the input resistor divider string. This bottom resistor must therefore be chosen carefully in order to reduce the error introduced by this bias current (see Figure 3). ADCMP36 the input voltage is increasing, the threshold is above VREF, and when it is decreasing, the threshold is below VREF. VIN_HI is the high input threshold used to trigger the output low to high transmission. VIN_LO is the low input threshold used to trigger the output high to low transmission. The upper input threshold level is given by V ( R+ R2) V = REF IN_HI R2 assuming RLOAD >> R2, RPULLUP where VREF =. V. The lower input threshold level is given by V V = REF IN_LO ( R+ R2 + R ) R2 + R PULLUP PULLUP V The hysteresis is the difference between these voltage levels and is given by V V IN IN V = R2 + R R CC R PULLUP V REF =.V V DD CC ADCMP36 R R PULLUP R LOAD V IN R IN ADCMP36 V DD R2 Figure 3. Comparator Configuration with Added Hysteresis R2 I BIAS V CC = 5V mv ADCMP36 PUTS GND Figure 3. Input Bias Current Effect on Input Resistor String The open-drain comparator outputs are limited to the maximum specified VDD voltage range, regardless of the VDD voltage. These outputs are capable of sinking up ma. 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 9.3 mv. Positive feedback can be used to increase hysteresis. For the configuration shown in Figure 3, two resistors are used to create different switching thresholds, depending on whether the input signal is increasing or decreasing in magnitude. When IN V REF IN+ V IN R = 2kΩ R2 = MΩ V V IN V IN_LO V IN_HI Figure 32. Noninverting Comparator Configuration with Hysteresis Rev. B Page of 2
12 ADCMP36 Data Sheet LINE DIMENSIONS BSC.95 BSC MAX.5 MIN.5 MAX.35 MIN.5 MAX.95 MIN SEATING PLANE.2 MAX.8 MIN 5.6 BSC COMPLIANT TO JEDEC STANDARDS MO-78-AA --2-A Figure Lead Small Outline Transistor Package [SOT-23] (RJ-5) Dimensions shown in millimeters ORDERING GUIDE Model, 2 Temperature Range Package Description Package Option Branding ADCMP36YRJZ-REEL7 C to +25 C 5-Lead SOT-23 RJ-5 M99 ADCMP36WRJZ-RL7 C to +25 C 5-Lead SOT-23 RJ-5 M99 Z = RoHS Compliant Part. 2 W = Qualified for Automotive Applications. AUTOMOTIVE PRODUCTS The ADCMP36W models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D696--5/(B) Rev. B Page 2 of 2
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