Analog Devices ADCMP370 1 Datasheet
General-Purpose Comparators
FEATURES
2.25 V to 5.5 V operating voltage range
Low power consumption (4 µA)
Output stages
ADCMP370: open-drain, high voltage (22 V tolerance)
ADCMP371: push-pull
50 nA input bias current
150 nA input offset current
9 mV input offset voltage
Rail-to-rail common-mode input range
Specified over –40°C to +85°C temperature range
5-lead SC70 package
APPLICATIONS
Voltage detectors
Battery management systems
A/D converters
Low voltage applications
Battery-powered electronics
Portable equipment
ADCMP370/ADCMP371
FUNCTIONAL BLOCK DIAGRAMS
V
CC
ADCMP370
IN+
IN–
GND
Figure 1.
V
CC
ADCMP371
IN+
IN–
V
CC
OUT
04745-0-001
OUT
GENERAL DESCRIPTION
The ADCMP370/ADCMP371 are general-purpose comparators
with input offset voltages of 9 mV (max) and low power
consumption, which make them ideal for battery-powered
portable equipment.
The ADCMP371 has a push-pull output stage, while the
ADCMP370 has an open-drain output. The inputs on both
parts and the output on the ADCMP370 can tolerate voltages
up to 22 V, making them suitable for use as voltage detectors in
portable equipment.
They are available in space-efficient 5-lead SC70 packaging.
GND
Figure 2.
04745-0-002
Rev. 0
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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
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Tel: 781.329.4700
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
www.analog.com
ADCMP370/ADCMP371
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Typical Performance Characteristics ............................................. 6
REVISION HISTORY
10/04—Revision 0: Initial Version
Applications........................................................................................9
Basic Comparator..........................................................................9
Adding Hysteresis..........................................................................9
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 11
Rev. 0 | Page 2 of 12
ADCMP370/ADCMP371
SPECIFICATIONS
VCC = Full Operating Range, TA = −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
SUPPLY
VCC Operating Voltage Range 2.25 5.5 V
Supply Current
COMMON-MODE INPUT RANGE 0 V
INPUT OFFSET VOLTAGE 9 mV VIN = VCC/2
INPUT OFFSET VOLTAGE AVERAGE DRIFT 5 µV/°C VCM = 0 V
INPUT BIAS CURRENT 50 nA VIN = VCC/2
INPUT OFFSET CURRENT 150 nA VIN = VCC/2
OUT VOLTAGE LOW 0.4 V
OUT VOLTAGE HIGH (ADCMP371) 0.8 V
OUT LEAKAGE CURRENT (ADCMP370) 1 µA
Output Rise Time 30 ns C
Output Fall Time 45 ns C
TIMING
Propagation Delay
4 7 µA
CC
CC
V
V
IN+ < IN−, I
IN+ > IN−, I
SINK
SOURCE
= 1.2 mA
= 500 µA
IN+ > IN−, OUT = 22 V
= 15 pF
OUT
= 15 pF
OUT
5 µs Input overdrive = 10 mV
2 µs Input overdrive = 100 mV
Rev. 0 | Page 3 of 12
ADCMP370/ADCMP371
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 2.
Parameter Rating
V
CC
IN+, IN− −0.3 V to +25 V
OUT (ADCMP370)
OUT (ADCMP371)
Operating Temperature Range
Storage Temperature Range
θ
Thermal Impedance, SC70 146°C/W
JA
Lead Temperature
Soldering (10 sec) 300°C
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C
−0.3 V to +6 V
−0.3 V to +25 V
−
0.3 V to +VCC
−40°C to +85°C
−65°C to +150°C
+ 0.3 V
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and 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.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. 0 | Page 4 of 12
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