ADCMP361_07

Single 0.275% Comparator and Reference with Dual Polarity Outputs ADCMP361 FEATURES 400 mV ± 0.275% threshold Supply range: 1.7 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 FUNCTIONAL BLOCK DIAGRAM VDD ADCMP361 IN OUT 400mV OUT 06496-001 APPLICATIONS Li-Ion monitoring Threshold detectors Relay driving Optoisolator driving Industrial control systems Handheld instruments GND Figure 1. GENERAL DESCRIPTION The ADCMP361 is a single low power, high accuracy comparator with a 400 mV reference in a 5-lead SOT-23 package. The internal 400 mV reference provides the ability to monitor low voltage supplies. The device operates on a supply voltage from 1.7 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. R1 4.7MΩ IN 3V + Li-Ion CELL R2 1MΩ + – OUT 400mV 06496-029 VDD ADCMP361 OUT R3 1MΩ C1 100nF GND Figure 2. Typical Li-Ion Monitoring Application DISCHARGING VBATT 2.280V 2.271V CHARGING VOUT 06496-030 Figure 3. Li-Ion Monitoring Waveforms Rev. 0 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 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. ADCMP361 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Thermal Characteristics .............................................................. 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ..............................................6 Application Information................................................................ 11 Comparators and Internal Reference ...................................... 11 Power Supply............................................................................... 11 Inputs ........................................................................................... 11 Outputs ........................................................................................ 11 Adding Hysteresis....................................................................... 11 Outline Dimensions ....................................................................... 12 Ordering Guide .......................................................................... 12 REVISION HISTORY 2/07—Revision 0: Initial Version Rev. 0 | Page 2 of 12 ADCMP361 SPECIFICATIONS VDD = 1.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C, unless otherwise noted. Table 1. Parameter THRESHOLDS 1 Rising Input Threshold Voltage Min 399.3 391.2 393.1 393.1 381.1 381.2 381.0 2 Typ 400.4 400.4 400.4 400.4 391.1 391.1 391.1 9.3 16 6.5 7.0 0.01 0.01 140 140 0.01 0.01 10 8 0.5 0.07 9 10 5 5 220 220 1 1 Max 401.5 407.7 405.9 405.8 400.9 398.4 398.2 13.5 ±0.275 Unit mV mV mV mV mV mV mV mV % ppm/°C μA μA nA nA mV mV μA μA μs μs μs μs Test Conditions/Comments VDD = 3.3 V, TA = 25°C VDD = 1.7 V VDD = 3.3 V VDD = 5.5 V VDD = 1.7 V VDD = 3.3 V VDD = 5.5 V TA = 25°C, VDD = 3.3 V Falling Input Threshold Voltage Hysteresis = VTH(R) – VTH(F) Threshold Voltage Accuracy Threshold Voltage Temperature Coefficient POWER SUPPLY Supply Current INPUT CHARACTERISTICS Input Bias Current OPEN-DRAIN OUTPUTS Output Low Voltage 2 Output Leakage Current 3 DYNAMIC PERFORMANCE High-to-Low Propagation Delay2, 4 Low-to-High Propagation Delay2, 4 Output Rise time2, 4 Output Fall time2, 4 1 2 VDD = 1.7 V VDD = 5.5 V VDD = 1.7 V, VIN = VDD VDD = 1.7 V, VIN = 0.1 V VDD = 1.7 V, IOUT = 3 mA VDD = 5.5 V, IOUT = 5 mA VDD = 1.7 V, VOUT = VDD VDD = 1.7 V, VOUT = 5.5 V VDD = 5 V, VOL = 400 mV VDD = 5 V, VOH = 0.9 × VDD VDD = 5 V, VO = (0.1 to 0.9) × VDD VDD = 5 V, VO = (0.1 to 0.9) × VDD RL = 100 kΩ, VO = 2 V swing. 10 mV input overdrive. 3 VIN = 40 mV overdrive. 4 RL = 10 kΩ. Rev. 0 | Page 3 of 12 ADCMP361 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter VDD IN OUT, OUT Operating Temperature Range Storage Temperature Range Lead Temperature Soldering (10 sec) Vapor Phase (60 sec) Infrared (15 sec) Rating −0.3 V to +6 V −0.3 V to +6 V −0.3 V to +6 V −40°C to +125°C −65°C to +150°C 300°C 215°C 220°C THERMAL CHARACTERISTICS 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 5-Lead SOT-23 θJA 240 Unit °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. 0 | Page 4 of 12 ADCMP361 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS OUT GND IN 1 2 3 5 OUT ADCMP361 4 VDD Figure 4. Pin Configuration Table 4. Pin Function Descriptions Pin No. 1 2 3 4 5 Mnemonic OUT GND IN VDD OUT Description Noninverting Open-Drain Output. Ground. Monitors analog input voltage on comparator. The other input of the comparator is connected to a 400 mV reference. Power Supply. Inverting Open-Drain Output. Rev. 0 | Page 5 of 12 06496-002 TOP VIEW (Not to Scale) ADCMP361 TYPICAL PERFORMANCE CHARACTERISTICS 60 50 VDD = 5V TA = 25°C 40 VDD = 5V TA = 25°C 50 PERCENT OF UNITS (%) 40 PERCENT OF UNITS (%) 30 30 20 20 10 10 06496-003 394 395 396 397 398 399 400 401 402 403 404 405 406 RISING INPUT THRESHOLD VOLTAGE (mV) 388 389 390 391 392 393 394 395 396 397 398 399 400 FALLING INPUT THRESHOLD VOLTAGE (mV) Figure 5. Distribution of Rising Input Threshold Voltage 35 30 Figure 8. Distribution of Falling Input Threshold Voltage 404 RISING INPUT THRESHOLD VOLTAGE (mV) VDD = 5V TA = 25°C PERCENT OF UNITS (%) 25 20 15 10 5 0 402 1 2 3 4 FOUR TYPICAL PARTS VDD = 5V 400 398 06496-004 6.0 6.4 6.8 7.2 7.6 8.0 8.4 8.8 9.2 9.6 10.0 10.4 10.8 HYSTERESIS (mV) –20 0 20 40 60 80 100 120 TEMPERATURE (°C) Figure 6. Distribution of Hysteresis 401 Figure 9. Rising Input Threshold Voltage vs. Temperature 12.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 –40 RISING INPUT THRESHOLD VOLTAGE (mV) TA = –40°C 400 TA = +25°C TA = +85°C 398 HYSTERESIS (mV) 399 VDD VDD VDD VDD = 1.8V = 2.5V = 3.3V = 5.0V 397 TA = +125°C 396 2.2 2.7 3.2 3.7 4.2 4.7 5.2 5.7 06496-007 –20 0 20 40 60 80 100 120 SUPPLY VOLTAGE (V) TEMPERATURE (°C) Figure 7. Rising Input Threshold Voltage vs. Supply Voltage Figure 10. Hysteresis vs. Temperature Rev. 0 | Page 6 of 12 06496-010 395 1.7 06496-005 396 –40 06496-006 0 0 ADCMP361 12 TA = +125°C 11 1 0 THRESHOLD SHIFT (mV) TA = +25°C 10 HYSTERESIS (mV) 9 8 7 6 5 4 1.7 TA = +85°C –1 –2 TA = –40°C TA = +25°C TA = +85°C TA = +125°C TA = –40°C –3 –4 06496-008 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Figure 11. Hysteresis vs. Supply Voltage Figure 14. Minimum Supply Voltage 10 50 NO LOAD CURRENT 9 SUPPLY CURRENT (mA) 40 SUPPLY CURRENT (µA) 8 TA = +85°C 7 TA = +125°C 30 TA = +25°C 6 TA = –40°C 5 20 TA = +25°C TA = +85°C TA = +125°C TA = –40°C 0 0.5 1.0 SUPPLY VOLTAGE (V) 1.5 06496-012 10 2.2 2.7 3.2 3.7 4.2 4.7 5.2 SUPPLY VOLTAGE (V) Figure 12. Quiescent Supply Current vs. Supply Voltage 06496-009 4 1.7 0 Figure 15. Start-Up Supply Current 1000 TA = –40°C VDD VDD VDD VDD = 5.0V = 3.3V = 2.5V = 1.7V 1000 TA = 25°C VDD VDD VDD VDD = 5.0V = 3.3V = 2.5V = 1.7V SUPPLY CURRENT (µA) 100 SUPPLY CURRENT (µA) 100 10 10 06496-013 0.01 0.1 1 10 100 0.01 0.1 1 10 100 OUTPUT SINK CURRENT (mA) OUTPUT SINK CURRENT (mA) Figure 13. Supply Current vs. Output Sink Current Figure 16. Supply Current vs. Output Sink Current Rev. 0 | Page 7 of 12 06496-014 1 0.001 1 0.001 06496-011 2.2 2.7 3.2 3.7 4.2 4.7 5.2 5.7 –5 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 ADCMP361 1000 TA = 85°C VDD VDD VDD VDD = 5.0V = 3.3V = 2.5V = 1.7V INPUT BIAS CURRENT (nA) 10k TA = +125°C 1k CURRENT IS GOING OUT OF THE DEVICE. VDD = 5V –0.3V < VIB < 0V SUPPLY CURRENT (µA) 100 100 TA = +85°C 10 TA = +25°C 10 1 TA = –40°C 06496-015 0.01 0.1 1 10 100 –0.2 –0.1 0 OUTPUT SINK CURRENT (mA) INPUT VOLTAGE (V) Figure 17. Supply Current vs. Output Sink Current Figure 20. Below Ground Input Bias Current 3 10 1 TA = +125°C TA = +85°C TA = +25°C TA = –40°C INPUT BIAS CURRENT (nA) INPUT BIAS CURRENT (nA) 1 TA = +125°C –1 TA = +85°C –3 0.1 TA = +25°C TA = –40°C –5 06496-017 0 0.2 0.4 0.6 0.8 1.0 1 2 3 INPUT VOLTAGE (V) 4 5 INPUT VOLTAGE (V) Figure 18. Low Level Input Bias Current 1000 TA = 25°C OUTPUT SATURATION VOLTAGE (mV) OUTPUT SATURATION VOLTAGE (mV) Figure 21. High Level Input Bias Current 1000 VDD VDD VDD VDD 100 = 5.0V = 3.3V = 2.5V = 1.8V TA = –40°C VDD = 5.0V VDD = 3.3V VDD = 2.5V VDD = 1.8V 100 10 10 06496-019 0.01 0.1 1 10 0.01 0.1 1 10 OUTPUT SINK CURRENT (mA) OUTPUT SINK CURRENT (mA) Figure 19. Output Saturation Voltage vs. Output Sink Current Figure 22. Output Saturation Voltage vs. Output Sink Current Rev. 0 | Page 8 of 12 06496-020 1 0.001 1 0.001 06496-018 –7 CURRENT IS POSITIVE GOING INTO THE DEVICE. VDD = 5V 0V < VIB < 1V 0.01 CURRENT IS GOING INTO THE DEVICE VDD = 5V VIB > 1V 06496-016 1 0.001 0.1 –0.3 ADCMP361 1000 OUTPUT SATURATION VOLTAGE (mV) SHORT-CIRCUIT CURRENT (mA) TA = 85°C VDD = 5.0V VDD = 3.3V VDD = 2.5V VDD = 1.8V 80 VDD = 5V 70 60 50 TA = +85°C 40 30 20 10 TA = +125°C TA = +25°C TA = –40°C 100 10 06496-021 0.01 0.1 1 10 0 2 OUTPUT VOLTAGE (V) 4 OUTPUT SINK CURRENT (mA) Figure 23. Output Saturation Voltage vs. Output Sink Current Figure 26. Short-Circuit Current vs. Output Voltage 70 60 SHORT-CIRCUIT CURRENT (mA) TA = 25°C 10 VDD = 5.0V OUTPUT LEAKAGE CURRENT (nA) VDD = 5V TA = +125°C 50 40 30 20 10 0 VDD = 3.3V 1 TA = +85°C TA = +25°C 0.1 TA = –40°C VDD = 2.5V VDD = 1.8V 0.01 06496-023 0 2 OUTPUT VOLTAGE (V) 4 0 1 2 3 4 5 OUTPUT VOLTAGE (V) Figure 24. Short-Circuit Current vs. Output Voltage 60 100 Figure 27. Output Leakage Current vs. Output Voltage TA = 25°C 50 PROPAGATION DELAY (µs) LH NONINV LH INV HL NONINV HL INV RISE AND FALL TIMES (µs) VDD = 5V CL = 20pF TA = 25°C 10 RISE 1 40 30 20 0.1 FALL 0.01 0.1 10 06496-025 0 20 40 60 80 100 1 10 100 1000 INPUT OVERDRIVE (mV) OUTPUT PULL-UP RESISTOR (kΩ) Figure 25. Propagation Delay vs. Input Overdrive Figure 28. Rise and Fall Times vs. Output Pull-Up Resistor Rev. 0 | Page 9 of 12 06496-027 0 06496-024 0.001 06496-022 1 0.001 0 ADCMP361 NON INV (OUTA) 2 INV (OUTB) 3 VIN (+INA, –INB) 1 CH1 50.0mV CH3 5.00V CH2 5.00V M20.0µs CH1 7mV Figure 29. Noninverting and Inverting Comparators Propagation Delay 06496-026 Rev. 0 | Page 10 of 12 ADCMP361 APPLICATION INFORMATION The ADCMP361 is a low power comparator and reference circuit featuring a 400 mV reference that operates from 1.7 V to 5.5 V. The comparator is 0.275% accurate with a built-in hysteresis of 9.3 mV. There are two outputs, one the inverse of the other. This enables the ADCMP361 to be used as an inverting or a noninverting comparator circuit. These opendrain outputs are capable of sinking 40 mA. OUTPUTS 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 40 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. VIN R1 IN R2 OUT IBIAS OUT 400mV 06496-028 COMPARATORS AND INTERNAL REFERENCE The comparator has one input available externally; the other comparator input is connected internally to the 400 mV reference. The rising input threshold voltage of the comparators is designed to be equal to that of the reference. VDD ADCMP361 POWER SUPPLY The ADCMP361 is designed to operate from 1.7 V to 5.5 V. A 100 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, 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, 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 30). GND Figure 30. Input Bias Current Effect on Input Resistor String Rev. 0 | Page 11 of 12 ADCMP361 OUTLINE DIMENSIONS 2.90 BSC 5 4 1.60 BSC 1 2 3 2.80 BSC PIN 1 0.95 BSC 1.30 1.15 0.90 1.90 BSC 1.45 MAX 0.22 0.08 10° 5° 0° 0.60 0.45 0.30 0.15 MAX 0.50 0.30 SEATING PLANE COMPLIANT TO JEDEC STANDARDS MO-178-A A Figure 31. 5-Lead Small Outline Transistor Package [SOT-23] (RJ-5) Dimensions shown in millimeters ORDERING GUIDE Model ADCMP361YRJZ-REEL7 1 1 Temperature Range –40°C to +125°C Package Description 5-Lead SOT-23 Package Option RJ-5 Branding M99 Z = Pb-free part. ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06496-0-2/07(0) Rev. 0 | Page 12 of 12