ANALOG DEVICES ADCMP670 Service Manual
Dual Low Power 1.5% Comparator
A
V
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FEATURES
400 mV ± 1.5% threshold
Supply range: 1.7 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: ±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
APPLICATIONS
Li-Ion monitoring
Portable applications
Hand-held instruments
Window comparators
LED/relay driving
Optoisolator driving
Control systems
With 400 mV Reference
ADCMP670
FUNCTIONAL BLOCK DIAGRAM
DD
ADCMP670-1
+IN
400mV
–INB
GND
Figure 1.
OUTA
OUTB
06493-001
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 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.
The ADCMP670 is currently available in one model, the
CMP670-1. This model has one inverting input and one
AD
noninverting input, making it suitable for use as a window
comparator. The device is suitable for portable, commercial,
industrial, and automotive applications.
404
402
400
398
396
394
392
THRESHOLD VO LTAGE (mV)
390
388
386
1A
1B
TWO TYPICAL PARTS
COMP A AND COMP B
V
= 5V
DD
–40 –20 0 20 40 60 80 100 120
Figure 2. Comparator Thresholds vs. Temperature
2A
2B
RISING I NPUT
FALLING INPUT
TEMPERATURE (° C)
06493-002
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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.
ADCMP670
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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
REVISION HISTORY
2/07—Revision 0: Initial Version
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
Rev. 0 | Page 2 of 16
ADCMP670
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SPECIFICATIONS
VDD = 1.7 V to 5.5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
THRESHOLDS
Rising Input Threshold Voltage 394 400 406 mV VDD = 1.7 V
395 400 405 mV VDD = 5.5 V
Falling Input Threshold Voltage 386 391.1 401 mV VDD = 1.7 V
387 391.1 400 mV VDD = 5.5 V
Hysteresis = V
INPUT CHARACTERISTICS
Input Bias Current 0.01 10 nA VDD = 1.7 V, VIN = VDD
4 10 nA VDD = 1.7 V, VIN = 0.1 V
OPEN-DRAN OUTPUTS
Output Low Voltage
130 200 mV VDD = 5.5 V, I
Output Leakage Current
0.01 0.8 μA VDD =1.7 V, V
DYNAMIC PERFORMANCE
High-to-Low Propagation Delay 10 μs VDD = 5.5 V, VOL = 400 mV
Low-to-High Propagation Delay 8 μs VDD = 5.5 V, VOH = 0.9 × VDD
Output Rise Time 0.5 μs VDD = 5.5 V, VO = (0.1 to 0.9) × VDD
Output Fall Time 0.07 μs VDD = 5.5 V, VO = (0.1 to 0.9) × VDD
POWER SUPPLY
Supply Current
6.5 11 μA VDD = 5.5 V
1
RL = 100 kΩ, VO = 2 V swing.
2
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
RL = 10 kΩ.
5
No load current.
1
– V
TH(R)
5
7 8.9 11 mV
TH(F)
2
3
2, 4
140 200 mV VDD = 1.7 V, I
0.01 0.8 μA VDD =1.7 V, V
5.7 10 μA VDD = 1.7 V
= 3 mA
OUT
= 5 mA
OUT
= VDD
OUT
= 5.5 V
OUT
Rev. 0 | Page 3 of 16
ADCMP670
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VDD = 1.7 V to 5.5 V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit Test Conditions/Comments
THRESHOLDS
Rising Input Threshold Voltage 391 409 mV VDD = 1.7 V
392.5 407.5 mV VDD = 5.5 V
Falling Input Threshold Voltage 383.5 403.5 mV VDD = 1.7 V
384.5 402.5 mV VDD = 5.5 V
Hysteresis = V
INPUT CHARACTERISTICS
Input Bias Current 15 nA VDD = 1.7 V, VIN = VDD
15 nA VDD = 1.7 V, VIN = 0.1 V
OPEN-DRAIN OUTPUTS
Output Low Voltage
250 mV VDD = 5.5 V, I
Output Leakage Current
1 μA VDD =1.7 V, V
POWER SUPPLY
Supply Current
14 μA VDD = 5.5 V
1
RL = 100 kΩ, VO = 2 V swing.
2
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
No load.
V
= 1.7 V to 5.5 V, −40°C ≤ TA ≤ 85°C, unless otherwise noted.
DD
1
– V
TH(R)
4
6.5 12.5 mV
TH(F)
2
3
250 mV VDD = 1.7 V, I
1 μA VDD =1.7 V, V
13 μA VDD = 1.7 V
= 3 mA
OUT
= 5 mA
OUT
= VDD
OUT
= 5.5 V
OUT
Table 3.
Parameter Min Typ Max Unit Test Conditions/Comments
THRESHOLDS
1
Rising Input Threshold Voltage 390 410 mV VDD = 1.7 V
392 408 mV VDD = 5.5 V
Falling Input Threshold Voltage 382.5 404.5 mV VDD = 1.7 V
383.5 403.5 mV VDD = 5.5 V
Hysteresis = V
TH(R)
– V
5.5 13.0 mV
TH(F)
INPUT CHARACTERISTICS
Input Bias Current 15 nA VDD = 1.7 V, VIN = VDD
15 nA VDD = 1.7 V, VIN = 0.1 V
OPEN-DRAIN OUTPUTS
Output Low Voltage
250 mV VDD = 5.5 V, I
Output Leakage Current
1 μA VDD =1.7 V, V
2
3
250 mV VDD = 1.7 V, I
1 μA VDD =1.7 V, V
= 3 mA
OUT
= 5 mA
OUT
= VDD
OUT
= 5.5 V
OUT
POWER SUPPLY
Supply Current
4
14 μA VDD = 1.7 V
15 μA VDD = 5.5 V
1
RL = 100 kΩ, VO = 2 V swing.
2
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
No load.
Rev. 0 | Page 4 of 16
ADCMP670
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VDD = 1.7 V to 5.5 V, −40°C ≤ TA ≤ 125°C, unless otherwise noted.
Table 4.
Parameter Min Typ Max Unit Test Conditions/Comments
THRESHOLDS
Rising Input Threshold Voltage 390 411 mV VDD = 1.7 V
392 410 mV VDD = 5.5 V
Falling Input Threshold Voltage 381.5 405.5 mV VDD = 1.7 V
381.05 404.5 mV VDD = 5.5 V
Hysteresis = V
INPUT CHARACTERISTICS
Input Bias Current 45 nA VDD = 1.7 V, VIN = VDD
45 nA VDD = 1.7 V, VIN = 0.1 V
OPEN-DRAIN OUTPUTS
Output Low Voltage
250 mV VDD = 5.5 V, I
Output Leakage Current
1 μA VDD = 1.7 V, V
POWER SUPPLY
Supply Current
17 μA VDD= 5.5 V
1
RL = 100 kΩ, VO = 2 V swing.
2
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
No load.
1
– V
TH(R)
4
2 13.5 mV
TH(F)
2
3
250 mV VDD = 1.7 V, I
1 μA VDD = 1.7 V, V
16 μA VDD = 1.7 V
= 3 mA
OUT
= 5 mA
OUT
OUT
OUT
= VDD
= 5.5 V
Rev. 0 | Page 5 of 16
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