Data Sheet
FEATURES
Dual 0.275% Comparators and Reference
with Programmable Hysteresis
ADCMP341/ADCMP343
FUNCTIONAL BLOCK DIAGRAMS
V
DD
VINA
R1 +INA_U
R2
R3
400mV
VINB
+INB_U
+INB_L
MUX
APPLICATIONS
Portable applications
Li-Ion monitoring
Handheld instruments
LED/relay driving
Optoisolator driving
Control systems
GND
Figure 1. ADCMP341
V
DD
VINA
R1
R2
R3
–INA_U
–INA_L
ADCMP343
MUX
OUTA
GENERAL DESCRIPTION
The ADCMP341/ADCMP343 consist of two low power, high
accuracy comparators with a 400 mV reference in an 8-lead
SOT-23 package. Operating within a supply range of 1.7 V to
5.5 V, the devices only draw 6.5 µA (typical), making them ideal
for low voltage system monitoring and portable applications.
Hysteresis is determined using three resistors in a string configura-
tion with the upper and lower tap points connected to the
±INA_U and ±INA_L pins of each comparator, respectively.
The state of the outputs of the comparators selects which pin is
internally connected to the comparators input. Therefore, a
change of state in the comparators output results in one of the
inputs being switched in to the comparator and the other being
switched out. This provides the user with a fully flexible and
accurate method of setting the hysteresis. One input of each
comparator is internally connected to the reference. The other
input is available externally, via an internal mux, through pins
±INA_U or ±INA_L. The state of the output determines which
of these pins is connected at any one time.
The comparator outputs are open-drain with the output stage
sinking capability guaranteed greater than 5 mA over temperature.
The ADCMP341 has noninverting inputs and the ADCMP343
has inverting inputs. The devices are suitable for portable,
commercial, industrial, and automotive applications.
Rev. A
Document Feedback
400mV
VINB
–INB_U
–INB_L
MUX
OUTB
GND
Figure 2. ADCMP343
R1 = 22kΩ
R2 = 2.2kΩ
R3 = 6.2kΩ
1
OUTA
V
IN
2
06500-029
CH1
2.00V
CH2 500mV
M100ms
Figure 3. Hysteresis programmed to 513 mV @ V
IN
on ADCMP341
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Technical Support
www.analog.com
06500-002
06500-001
400 mV ± 0.275% threshold
User programmable hysteresis via resistor string
Supply range: 1.7 V to 5.5 V
Low quiescent current: 6.5 µA typical
Input range includes ground
Low input bias current: ±5 nA maximum
Open-drain outputs
Supports wired-AND connections
Input polarities:
ADCMP341 noninverting
ADCMP343 inverting
Small SOT-23 package
ADCMP341
MUX
+INA_L
OUTA
OUTB
ADCMP341/ADCMP343
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagrams ............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings ............................................................ 4
Thermal Characteristics .............................................................. 4
ESD Caution .................................................................................. 4
Pin Configurations and Function Descriptions ........................... 5
Data Sheet
Typical Performance Characteristics ..............................................6
Application Information ................................................................ 10
Comparators and Internal Reference ...................................... 10
Power Supply............................................................................... 10
Inputs ........................................................................................... 10
Outputs ........................................................................................ 10
Programming Hysteresis ........................................................... 10
Layout Recommendations ........................................................ 10
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 11
REVISION HISTORY
8/13—Rev. 0 to Rev. A
Changes to Figure 8 .......................................................................... 6
Updated Outline Dimensions ....................................................... 11
2/07—Revision 0: Initial Version
Rev. A | Page 2 of 12
Data Sheet
SPECIFICATIONS
V
DD
= 1.7 V to 5.5 V, −40°C ≤ T
A
≤ +125°C, unless otherwise noted.
Table 1.
Parameter
THRESHOLD
1
Threshold Voltage
Min
396.6
399.3
398.5
395.0
397.4
396.9
391.2
393.4
393.2
Typ
400.4
400.4
400.4
400.4
400.4
400.4
400.4
400.4
400.4
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
404.3
401.5
402.2
405.8
403.4
403.7
407.7
405.6
405.8
±0.275
Unit
mV
mV
mV
mV
mV
mV
mV
mV
mV
%
ppm/°C
µA
µA
nA
nA
mV
mV
µA
µA
µs
µs
µs
µs
ADCMP341/ADCMP343
Test Conditions/Comments
V
DD
= 1.7 V, T
A
= 25°C
V
DD
= 3.3 V, T
A
= 25°C
V
DD
= 5.5 V, T
A
= 25°C
V
DD
= 1.7 V, 0°C ≤ T
A
≤ 70°C
V
DD
= 3.3 V, 0°C ≤ T
A
≤ 70°C
V
DD
= 5.5 V, 0°C ≤ T
A
≤ 70°C
V
DD
= 1.7 V, −40°C ≤ T
A
≤ +125°C
V
DD
= 3.3 V, −40°C ≤ T
A
≤ +125°C
V
DD
= 5.5 V, −40°C ≤ T
A
≤ +125°C
T
A
= 25°C, V
DD
= 3.3 V
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
2, 4
High-to-Low Propagation Delay
Low-to-High Propagation Delay
Output Rise Time
Output Fall Time
R
L
= 100 kΩ, V
O
= 2 V swing.
10 mV input overdrive.
3
V
IN
= 40 mV overdrive.
4
R
L
= 10 kΩ.
1
2
V
DD
= 1.7 V
V
DD
= 5.5 V
V
DD
= 1.7 V, V
IN
= V
DD
V
DD
= 1.7 V, V
IN
= 0.1 V
V
DD
= 1.7 V, I
OUT
= 3 mA
V
DD
= 5.5 V, I
OUT
= 5 mA
V
DD
= 1.7 V, V
OUT
= V
DD
V
DD
= 1.7 V, V
OUT
= 5.5 V
V
DD
= 5 V, V
OL
= 400 mV
V
DD
= 5 V, V
OH
= 0.9 × V
DD
V
DD
= 5 V, V
O
= (0.1 to 0.9) × V
DD
V
DD
= 5 V, V
O
= (0.1 to 0.9) × V
DD
Rev. A | Page 3 of 12
ADCMP341/ADCMP343
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
V
DD
±INA_U, ±INA_L, ±INB_U, ±INB_L
OUTA, OUTB
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
Data Sheet
THERMAL CHARACTERISTICS
θ
JA
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
8-Lead SOT-23
θ
JA
211.5
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. A | Page 4 of 12
Data Sheet
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
OUTA
+INA_U
+INA_L
GND
1
2
3
4
8
ADCMP341/ADCMP343
OUTB
V
DD
+INB_U
06500-003
OUTA
–INA_U
–INA_L
GND
1
2
3
4
8
OUTB
V
DD
–INB_U
–INB_L
06500-004
ADCMP341
TOP VIEW
(Not to Scale)
7
6
5
ADCMP343
TOP VIEW
(Not to Scale)
7
6
5
+INB_L
Figure 4. ADCMP341 Pin Configuration
Figure 5. ADCMP343 Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
Mnemonic
OUTA
±INA_U
±INA_L
GND
±INB_L
±INB_U
V
DD
OUTB
Description
Open-Drain Output for Comparator A.
Monitors Analog Input Voltage on Comparator A. Connect to the upper tap point of the resistor string. Connect
internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled
by the output level on Comparator A. The other input of Comparator A is connected to a 400 mV reference.
Monitors Analog Input Voltage on Comparator A. Connect to the lower tap point of the resistor string. Connect
internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled
by the output level on Comparator A. The other input of Comparator A is connected to a 400 mV reference.
Ground.
Monitors Analog Input Voltage on Comparator B. Connect to the lower tap point of the resistor string. Connect
internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled
by the output level on Comparator B. The other input of Comparator B is connected to a 400 mV reference.
Monitors Analog Input Voltage on Comparator B. Connect to the upper tap point of the resistor string. Connect
internally to the noninverting input on the ADCMP341 or the inverting pin on the ADCMP343 via a mux controlled
by the output level on Comparator B. The other input of Comparator B is connected to a 400 mV reference.
Power Supply Pin.
Open-Drain Output for Comparator B.
Rev. A | Page 5 of 12
