Preliminary Technical Data
Dual Comparators with 400mV Reference
and programmable Hysteresis
ADCMP341/ADCMP343
FEATURES
FUNCTIONAL BLOCK DIAGRAM
VINA
VS
ADCMP341
INA_U
INA_L
MUX
Low Quiescent Current: 6.5µA Typ
Supply Range: 1.7V to 5.5V
400mV Reference ±0.8% Accuracy Over Temperature
Input Range Includes Ground
User programmable Hysteresis via resistor string
Low Input Bias Current: ±10nA Max
Open drain outputs with 40mA Typical Sink Current
Supports Wired-AND Connections
Input Polarities:
ADCMP341 noninverting
ADCMP343 inverting
Small SOT-23 Package
OUTA
400mV
VINB
OUTB
INB_U
Battery-Powered System Monitoring
Threshold Detectors
Relay Driving
Optoisolator Driving
Handheld Instruments
INB_L
MUX
APPLICATIONS
GND
VINA
VS
GENERAL DESCRIPTION
ADCMP343
The ADCMP341/ADCMP343 combine two low power, low
voltage comparators with a 400mV reference in the 5-lead
SOT-23 package. Operating within a supply range of 1.7V to
5.5V, the devices only draw 6.5µA typical, making them ideal
for low voltage system monitoring and portable applications.
INA_U
MUX
INA_L
OUTA
400mV
VINB
OUTB
INB_U
INB_L
MUX
Hysteresis is determined using three resistors in a string
configuration with the upper and lower tap points connected to
the INA_U and INA_L pins of each comparator respectively.
The state of the comparators output internally selects which pin
is connected to the comparator inputs. So a change of state in
the comparator output will result in one of the inputs being
switched in to the comparator and the other being switched
out. This will provide the user with a fully flexible and simple
method of setting the hysteresis. Although there are two pins
available on each comparator, there is only actually one input
available externally at any one time, the other inputs are
connected internally to the reference.
GND
Figure 1
The comparator outputs are open drain with the output stage
sinking capability guaranteed greater than 5mA over
temperature. The ADCMP341 have noninverting inputs and
the ADCMP343 have inverting inputs. Available in
commercial, industrial and automotive temperature ranges.
Rev. PrD
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