ANALOG DEVICES ADCMP361 Service Manual
Single 0.275% Comparator and Reference
V
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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
APPLICATIONS
Li-Ion monitoring
Threshold detectors
Relay driving
Optoisolator driving
Industrial control systems
Handheld instruments
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
an
d 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
au
tomotive applications.
with Dual Polarity Outputs
ADCMP361
FUNCTIONAL BLOCK DIAGRAM
DD
ADCMP361
IN
400mV
GND
Figure 1.
R1
4.7MΩ
IN
3V
Li-Ion
CELL
+
R2
1MΩ
C1
100nF
Figure 2. Typical Li-Ion Monitoring Application
+
–
DISCHARGING
V
BATT
2.280V
2.271V
V
DD
400mV
GND
OUT
OUT
06496-001
ADCMP361
OUT
OUT
CHARGING
R3
1MΩ
06496-029
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.
V
OUT
Figure 3. Li-Ion Monitoring Waveforms
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.
06496-030
ADCMP361
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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............................................................ 4
Thermal Characteristics .............................................................. 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
REVISION HISTORY
2/07—Revision 0: Initial Version
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
Rev. 0 | Page 2 of 12
ADCMP361
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SPECIFICATIONS
VDD = 1.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
THRESHOLDS
Rising Input Threshold Voltage 399.3 400.4 401.5 mV VDD = 3.3 V, TA = 25°C
391.2 400.4 407.7 mV VDD = 1.7 V
393.1 400.4 405.9 mV VDD = 3.3 V
393.1 400.4 405.8 mV VDD = 5.5 V
Falling Input Threshold Voltage 381.1 391.1 400.9 mV VDD = 1.7 V
381.2 391.1 398.4 mV VDD = 3.3 V
381.0 391.1 398.2 mV VDD = 5.5 V
Hysteresis = V
Threshold Voltage Accuracy ±0.275 % TA = 25°C, VDD = 3.3 V
Threshold Voltage Temperature Coefficient 16 ppm/°C
POWER SUPPLY
Supply Current 6.5 9 μA VDD = 1.7 V
7.0 10 μA VDD = 5.5 V
INPUT CHARACTERISTICS
Input Bias Current 0.01 5 nA VDD = 1.7 V, VIN = VDD
0.01 5 nA VDD = 1.7 V, VIN = 0.1 V
OPEN-DRAIN OUTPUTS
Output Low Voltage
140 220 mV VDD = 5.5 V, I
Output Leakage Current
0.01 1 μA VDD = 1.7 V, V
DYNAMIC PERFORMANCE
High-to-Low Propagation Delay
Low-to-High Propagation Delay
Output Rise time
Output Fall time
1
RL = 100 kΩ, VO = 2 V swing.
2
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
RL = 10 kΩ.
1
– V
TH(R)
2 9.3 13.5 mV
TH(F)
2
3
2, 4
10 μs VDD = 5 V, VOL = 400 mV
2, 4
2, 4
2, 4
140 220 mV VDD = 1.7 V, I
0.01 1 μA VDD = 1.7 V, V
= 3 mA
OUT
= 5 mA
OUT
= VDD
OUT
OUT
= 5.5 V
8 μs VDD = 5 V, VOH = 0.9 × VDD
0.5 μs VDD = 5 V, VO = (0.1 to 0.9) × VDD
0.07 μs VDD = 5 V, VO = (0.1 to 0.9) × VDD
Rev. 0 | Page 3 of 12
ADCMP361
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ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
VDD −0.3 V to +6 V
IN −0.3 V to +6 V
OUT, OUT
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
Lead Temperature
Soldering (10 sec) 300°C
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C
Stresses above those listed under Absolute Maximum Ratings
y cause permanent damage to the device. This is a stress
ma
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.
−0.3 V to +6 V
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 θJA Unit
5-Lead SOT-23 240 °C/W
ESD CAUTION
Rev. 0 | Page 4 of 12
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