LMV7231 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – Hex Window Comparator with 1.5 Precision and 400mV Reference

LMV7231
September 8, 2010
Hex Window Comparator with 1.5% Precision and 400mV
Reference
General Description
The LMV7231 is a 1.5% accurate Hex Window Comparator
which can be used to monitor power supply voltages. The
device uses an internal 400mV reference for the comparator
trip value. The comparator set points can be set via external
resistor dividers. The LMV7231 has 6 outputs (CO1-CO6)
that signal an under-voltage or over-voltage event for each
power supply input. An output (AO) is also provided to signal
when any of the power supply inputs have an over-voltage or
under-voltage event. This ability to signal an under-voltage or
over-voltage event for the individual power supply inputs, in
addition to an output to signal such an event on any of the
power supply inputs adds unparalleled system protection ca-
pability.
The LMV7231’s +2.2V to +5.5V power supply voltage range,
low supply current, and input/output voltage range above V+
make it ideal for a wide range of power supply monitoring ap-
plications. Operation is guaranteed over the -40°C to +125°C
temperature range. The device is available in a 24-pin LLP
package.
Features
(For V_S = 3.3V ±10%, Typical unless otherwise noted)
■ ^{High accuracy voltage reference: 400 mV}
■ ^{Threshold Accuracy: ±1.5% (max)}
■ ^{Wide supply voltage range +2.2V to +5.5V}
■ ^{Input/Output voltage range above V+}
■ ^{Internal hysteresis: 6mV}
■ ^{Propagation delay: 2.6 µs to 5.6 µs}
■ ^{Supply Current 7.7 µA per channel}
■ ^{24 lead LLP package}
■ ^{Temperature range: -40°C to 125°C}
Applications
■ ^{Power Supply Voltage Detection}
■ ^{Battery Monitoring}
■ ^{Handheld Instruments}
■ ^{Relay Driving}
■ ^{Industrial Control Systems}
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