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Dual Low Power 1.5% Comparator With 400 mV Reference ADCMP670
FEATURES
400 mV 1.5% threshold Supply range: 1.7 V to 5.5 V Low quiescent current: 6.5 A typical Input range includes ground Internal hysteresis: 8.9 mV typical Low input bias current: 10 nA maximum Open-drain outputs Supports wire-AND connections Input polarities: one inverting and one noninverting Low profile (1 mm) TSOT package Drop-in replacement for the LT6700-1
FUNCTIONAL BLOCK DIAGRAM
VDD
ADCMP670-1
+INA OUTA 400mV OUTB -INB
06493-001
GND
Figure 1.
APPLICATIONS
Li-Ion monitoring Portable applications Hand-held instruments Window comparators LED/relay driving Optoisolator driving Control systems
GENERAL DESCRIPTION
The ADCMP670 consists of two low power, high accuracy, comparator and reference circuits in a 6-lead TSOT 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 draws only 6.5 A 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. The ADCMP670 is currently available in one model, the ADCMP670-1. 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.
404 402
THRESHOLD VOLTAGE (mV)
1A 1B
2A 2B
400 398 396 394 392 390 388 TWO TYPICAL PARTS COMP A AND COMP B VDD = 5V -20 0 20 40 60 80 100 120 TEMPERATURE (C)
06493-002
RISING INPUT
FALLING INPUT
386 -40
Figure 2. Comparator Thresholds vs. Temperature
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 (c)2007 Analog Devices, Inc. All rights reserved.
ADCMP670 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 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................................................................ 13 Comparators and Internal Reference ...................................... 13 Power Supply............................................................................... 13 Inputs ........................................................................................... 13 Outputs ........................................................................................ 13 Adding Hysteresis....................................................................... 13 Outline Dimensions ....................................................................... 14 Ordering Guide .......................................................................... 14
REVISION HISTORY
2/07--Revision 0: Initial Version
Rev. 0 | Page 2 of 16
ADCMP670 SPECIFICATIONS
VDD = 1.7 V to 5.5 V, TA = 25C, unless otherwise noted. Table 1.
Parameter THRESHOLDS 1 Rising Input Threshold Voltage Falling Input Threshold Voltage Hysteresis = VTH(R) - VTH(F) INPUT CHARACTERISTICS Input Bias Current OPEN-DRAN OUTPUTS Output Low Voltage 2 Output Leakage Current 3 DYNAMIC PERFORMANCE2, 4 High-to-Low Propagation Delay Low-to-High Propagation Delay Output Rise Time Output Fall Time POWER SUPPLY Supply Current 5 Min 394 395 386 387 7 Typ 400 400 391.1 391.1 8.9 0.01 4 140 130 0.01 0.01 10 8 0.5 0.07 5.7 6.5 10 11 Max 406 405 401 400 11 10 10 200 200 0.8 0.8 Unit mV mV mV mV mV nA nA mV mV A A s s s s A A Test Conditions/Comments VDD = 1.7 V VDD = 5.5 V 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 = 5.5 V, VOL = 400 mV VDD = 5.5 V, VOH = 0.9 x VDD VDD = 5.5 V, VO = (0.1 to 0.9) x VDD VDD = 5.5 V, VO = (0.1 to 0.9) x VDD VDD = 1.7 V VDD = 5.5 V
1 2
RL = 100 k, VO = 2 V swing. 10 mV input overdrive. 3 VIN = 40 mV overdrive. 4 RL = 10 k. 5 No load current.
Rev. 0 | Page 3 of 16
ADCMP670
VDD = 1.7 V to 5.5 V, 0C TA 70C, unless otherwise noted. Table 2.
Parameter THRESHOLDS 1 Rising Input Threshold Voltage Falling Input Threshold Voltage Hysteresis = VTH(R) - VTH(F) INPUT CHARACTERISTICS Input Bias Current OPEN-DRAIN OUTPUTS Output Low Voltage 2 Output Leakage Current 3 POWER SUPPLY Supply Current 4 Min 391 392.5 383.5 384.5 6.5 Typ Max 409 407.5 403.5 402.5 12.5 15 15 250 250 1 1 13 14 Unit mV mV mV mV mV nA nA mV mV A A A A Test Conditions/Comments VDD = 1.7 V VDD = 5.5 V 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 = 1.7 V VDD = 5.5 V
1 2 3
RL = 100 k, VO = 2 V swing. 10 mV input overdrive. VIN = 40 mV overdrive. 4 No load.
VDD = 1.7 V to 5.5 V, -40C TA 85C, unless otherwise noted. Table 3.
Parameter THRESHOLDS 1 Rising Input Threshold Voltage Falling Input Threshold Voltage Hysteresis = VTH(R) - VTH(F) INPUT CHARACTERISTICS Input Bias Current OPEN-DRAIN OUTPUTS Output Low Voltage 2 Output Leakage Current 3 POWER SUPPLY Supply Current 4 Min 390 392 382.5 383.5 5.5 Typ Max 410 408 404.5 403.5 13.0 15 15 250 250 1 1 14 15 Unit mV mV mV mV mV nA nA mV mV A A A A Test Conditions/Comments VDD = 1.7 V VDD = 5.5 V 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 = 1.7 V VDD = 5.5 V
1 2
RL = 100 k, VO = 2 V swing. 10 mV input overdrive. 3 VIN = 40 mV overdrive. 4 No load.
Rev. 0 | Page 4 of 16
ADCMP670
VDD = 1.7 V to 5.5 V, -40C TA 125C, unless otherwise noted. Table 4.
Parameter THRESHOLDS 1 Rising Input Threshold Voltage Falling Input Threshold Voltage Hysteresis = VTH(R) - VTH(F) INPUT CHARACTERISTICS Input Bias Current OPEN-DRAIN OUTPUTS Output Low Voltage 2 Output Leakage Current 3 POWER SUPPLY Supply Current 4 Min 390 392 381.5 381.05 2 Typ Max 411 410 405.5 404.5 13.5 45 45 250 250 1 1 16 17 Unit mV mV mV mV mV nA nA mV mV A A A A Test Conditions/Comments VDD = 1.7 V VDD = 5.5 V 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 = 1.7 V VDD= 5.5 V
1 2 3
RL = 100 k, VO = 2 V swing. 10 mV input overdrive. VIN = 40 mV overdrive. 4 No load.
Rev. 0 | Page 5 of 16
ADCMP670 ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter VDD +INA, -INB OUTA, OUTB Output Short Circuit Duration1 Input Current Operating Temperature Range Storage Temperature Range Lead Temperature Soldering (10 sec) Vapor Phase (60 sec) Infrared (15 sec)
1
THERMAL RESISTANCE
Range -0.3 V to +6 V -0.3 V to +6 V -0.3 V to +6 V Indefinite -10 mA -40C to +125C -65C to +150C 300C 215C 220C
JA 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 6-Lead TSOT JA 200 Unit 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. 0 | Page 6 of 16
ADCMP670 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
OUTA GND +INA
1 2 3 6
OUTB VDD -INB
06493-003
ADCMP670-1
TOP VIEW (Not to Scale)
5 4
Figure 3. Pin Configuration
Table 7. Pin Function Descriptions
Pin No. 1 2 3 4 5 6 Mnemonic OUTA GND +INA -INB VDD OUTB Description Open-Drain Output for Comparator A. Ground. Monitors analog input voltage on Comparator A. Connected to noninverting input. The other input of Comparator A is connected to a 400 mV reference. Monitors analog input voltage on Comparator B. Connected to inverting input. The other input of Comparator B is connected to a 400 mV reference. Power Supply Pin. Open-Drain Output for Comparator B.
Rev. 0 | Page 7 of 16
ADCMP670 TYPICAL PERFORMANCE CHARACTERISTICS
60 VDD = 5V TA = 25C 50 VDD = 5V TA = 25C 40 50
PERCENT OF UNITS (%)
40
PERCENT OF UNITS (%)
06493-004
30
30
20
20
10
10
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 4. Distribution of Rising Input Threshold Voltage
35 30
Figure 7. Distribution of Falling Input Threshold Voltage
402
RISING INPUT THRESHOLD VOLTAGE (mV)
VDD = 5V TA = 25C
PERCENT OF UNITS (%)
25 20 15 10 5 0
401
VDD VDD VDD VDD
= 1.8V = 2.5V = 3.3V = 5.0V
400
399
06493-005
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 5. Distribution of Hysteresis
404
Figure 8. Rising Input Threshold Voltage vs. Temperature
401
RISING INPUT THRESHOLD VOLTAGE (mV)
RISING INPUT THRESHOLD VOLTAGE (mV)
402
1 2 3 4
FOUR TYPICAL PARTS VDD = 5V
TA = -40C
400 TA = +25C 399 TA = +85C 398
400
397 TA = +125C 396
398
06493-006
-20
0
20
40
60
80
100
120
TEMPERATURE (C)
SUPPLY VOLTAGE (V)
Figure 6. Rising Input Threshold Voltage vs. Temperature
Figure 9. Rising Input Threshold Voltage vs. Supply Voltage
Rev. 0 | Page 8 of 16
06493-009
396 -40
395 1.7
2.2
2.7
3.2
3.7
4.2
4.7
5.2
5.7
06493-008
398 -40
06493-007
0
0
ADCMP670
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
06493-010
1A 1B 2A 2B
HYSTERESIS (mV)
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
VDD VDD VDD VDD
= 1.8V = 2.5V = 3.3V = 5.0V
HYSTERESIS (mV)
FOUR TYPICAL PARTS VDD = 5V
-20
0
20
40
60
80
100
120
-20
0
20
40
60
80
100
120
TEMPERATURE (C)
TEMPERATURE (C)
Figure 10. Hysteresis vs. Temperature
12 TA = +125C 11
THRESHOLD SHIFT (mV)
Figure 13. Hysteresis vs. Temperature
1
0 TA = +25C TA = -40C TA = +25C TA = +85C TA = +125C
10
HYSTERESIS (mV)
9 8 7 6 5 4 1.7 TA = +85C
-1
-2
TA = -40C
-3
-4
06493-011
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
Figure 11. Hysteresis vs. Supply Voltage
10
Figure 14. Minimum Supply Voltage
50
NO LOAD CURRENT
9
SUPPLY CURRENT (mA)
SUPPLY CURRENT (A)
40
8 TA = +85C 7
TA = +125C
30
TA = +25C 6 TA = -40C 5
20 TA = +25C TA = +85C TA = +125C TA = -40C 0 0.5 1.0 SUPPLY VOLTAGE (V) 1.5
06493-015
10
2.2
2.7
3.2
3.7
4.2
4.7
5.2
SUPPLY VOLTAGE (V)
06493-012
4 1.7
0
Figure 12. Quiescent Supply Current vs. Supply Voltage
Figure 15. Start-Up Supply Current
Rev. 0 | Page 9 of 16
06493-014
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
06493-013
4.0 -40
4.0 -40
ADCMP670
1000 TA = -40C VDD VDD VDD VDD = 5.0V = 3.3V = 2.5V = 1.7V
SUPPLY CURRENT (A)
1000 TA = 25C VDD VDD VDD VDD = 5.0V = 3.3V = 2.5V = 1.7V
SUPPLY CURRENT (A)
100
100
10
10
06493-016
0.01
0.1
1
10
100
0.01
0.1
1
10
100
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT (mA)
Figure 16. Supply Current vs. Output Sink Current
1000 TA = 85C VDD VDD VDD VDD = 5.0V = 3.3V = 2.5V = 1.7V
INPUT BIAS CURRENT (nA)
Figure 19. Supply Current vs. Output Sink Current
10k TA = +125C 1k
CURRENT IS GOING OUT OF THE DEVICE. VDD = 5V -0.3V < VIB < 0V
SUPPLY CURRENT (A)
100
100 TA = +85C
10
TA = +25C
10
1
TA = -40C
0.01
0.1
1
10
100
06493-018
-0.2
-0.1
0
OUTPUT SINK CURRENT (mA)
INPUT VOLTAGE (V)
Figure 17. Supply Current vs. Output Sink Current
3 10
Figure 20. Below Ground Input Bias Current
1
INPUT BIAS CURRENT (nA)
-1
TA = +125C TA = +85C TA = +25C TA = -40C
INPUT BIAS CURRENT (nA)
TA = +125C 1 TA = +85C
-3
0.1
TA = +25C
TA = -40C
-5
CURRENT IS POSITIVE GOING INTO THE DEVICE. VDD = 5V 0V < VIB < 1V
06493-020
CURRENT IS GOING INTO THE DEVICE VDD = 5V VIB > 1V 0.6 0.8 1.0 1 2 3 INPUT VOLTAGE (V) 4 5
06493-021
-7 0 0.2 0.4 INPUT VOLTAGE (V)
0.01
Figure 18. Low Level Input Bias Current
Figure 21. High Level Input Bias Current
Rev. 0 | Page 10 of 16
06493-019
1 0.001
0.1 -0.3
06493-017
1 0.001
1 0.001
ADCMP670
1000
OUTPUT SATURATION VOLTAGE (mV) OUTPUT SATURATION VOLTAGE (mV)
TA = 25C VDD = 5.0V VDD = 3.3V VDD = 2.5V VDD = 1.8V
1000
TA = -40C VDD = 5.0V VDD = 3.3V VDD = 2.5V VDD = 1.8V
100
100
10
10
06493-022
0.01
0.1
1
10
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT (mA)
Figure 22. Output Saturation Voltage vs. Output Sink Current
1000
OUTPUT SATURATION VOLTAGE (mV)
Figure 25. Output Saturation Voltage vs. Output Sink Current
80 VDD = 5V 70
SHORT-CIRCUIT CURRENT (mA)
TA = 85C VDD = 5.0V VDD = 3.3V VDD = 2.5V VDD = 1.8V
TA = +25C
TA = -40C
60 50 TA = +85C 40 30 20 10 TA = +125C
100
10
06493-024
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
70 60
SHORT-CIRCUIT CURRENT (mA)
Figure 26. Output Short-Circuit Current
10
TA = 25C
VDD = 5.0V
OUTPUT LEAKAGE CURRENT (nA)
VDD = 5V TA = +125C
50 40 30 20 10 0 VDD = 3.3V
1 TA = +85C TA = +25C 0.1 TA = -40C
VDD = 2.5V
VDD = 1.8V
0.01
06493-026
0
2 OUTPUT VOLTAGE (V)
4
0
1
2
3
4
5
OUTPUT VOLTAGE (V)
Figure 24. Output Short-Circuit Current
Figure 27. Output Leakage Current
Rev. 0 | Page 11 of 16
06493-027
0.001
06493-025
1 0.001
0
06493-023
1 0.001
1 0.001
ADCMP670
60 TA = 25C LH NONINV LH INV HL NONINV HL INV
RISE AND FALL TIMES (s)
100
50
PROPAGATION DELAY (s)
VDD = 5V CL = 20pF TA = 25C
10 RISE 1
40
30
20
0.1 FALL 0.01 0.1
10
06493-028
0
20
40
60
80
100
1
10
100
1000
INPUT OVERDRIVE (mV)
OUTPUT PULL-UP RESISTOR (k)
Figure 28. Propagation Delay vs. Input Overdrive
Figure 30. Rise and Fall Times vs. Output Pull-Up Resistor
NON INV (OUTA)
2
INV (OUTB)
3
VIN (+INA, -INB)
1
CH1 50.0mV CH3 5.00V
CH2 5.00V
M20.0s
CH1
7mV
Figure 29. Noninverting and Inverting Comparators Propagation Delay
06493-029
Rev. 0 | Page 12 of 16
06493-030
0
ADCMP670 APPLICATION INFORMATION
The ADCMP670 is a dual low power comparator with a built-in 400 mV reference that operates from 1.7 V to 5.5 V. The comparator is 1.5% accurate with a built-in hysteresis of 8.9 mV. The outputs are open-drain, capable of sinking 40 mA.
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 40 mA. Outputs can be tied together to provide a window comparator with a single output.
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 400 mV reference. The rising input threshold voltage of the comparators is designed to be equal to that of the reference.
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.
POWER SUPPLY
The ADCMP670 is designed to operate from 1.7 V to 5.5 V. A 0.1 F 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.
Rev. 0 | Page 13 of 16
ADCMP670 OUTLINE DIMENSIONS
2.90 BSC
6 5 4
1.60 BSC
1 2 3
2.80 BSC
PIN 1 INDICATOR 0.95 BSC *0.90 0.87 0.84 1.90 BSC
*1.00 MAX
0.20 0.08 8 4 0 0.60 0.45 0.30
0.10 MAX
0.50 0.30
SEATING PLANE
*COMPLIANT TO JEDEC STANDARDS MO-193-AA WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS.
Figure 31. 6-Lead Thin Small Outline Transistor Package [TSOT] (UJ-6) Dimensions shown in millimeters
ORDERING GUIDE
Model ADCMP670-1YUJZ-RL7 1
1
Temperature Range -40C to +125C
Package Description 6-Lead Thin Small Outline Transistor Package [TSOT]
Package Option UJ-6
Branding M97
Z = Pb-free part.
Rev. 0 | Page 14 of 16
ADCMP670 NOTES
Rev. 0 | Page 15 of 16
ADCMP670 NOTES
(c)2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06493-0-2/07(0)
Rev. 0 | Page 16 of 16

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