Controller

(FPGA)

+

-

+

-

Channel 1

UV1

OV6

OV5

OV4

OV3

OV2

V+

OV1

+IN1

-IN1

GND

AO

CO1

*

*

COPOL

UV6

UV5

UV4

UV3

UV2

UV1

* Open Drain

AOSEL

*

OV1

Channel 6

+IN6

-IN6

CO6

+400mV

REF

LMV7231

COPOL

REF

UV6

OV6

REF

Monitored Voltage #1

Monitored Voltage #6

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LMV7231

SNOSB45F – FEBRUARY 2010 – REVISED JANUARY 2016

LMV7231 Hex Window Comparator With 1.5% Precision and 400-mV Reference

1

1 Features

1

•

Noted)

•

Undervoltage and Overvoltage Detection

•

High Accuracy Voltage Reference: 400 mV

•

Threshold Accuracy: ±1.5% (Maximum)

•

Wide Supply Voltage Range 2.2 V to 5.5 V

•

Input and Output Voltage Range Above V+

•

Internal Hysteresis: 6 mV

•

Propagation Delay: 2.6 µs to 5.6 µs

•

Supply Current 7.7 µA Per Channel

•

24-Lead WQFN Package

•

Temperature Range: –40°C to +125°C

2 Applications

•

Power Supply Voltage Monitoring

•

Battery Monitoring

•

Handheld Instruments

•

Relay Driving

•

Industrial Control Systems

3 Description

The LMV7231 device is a 1.5% accurate Hex

Window Comparator which can be used to monitor

power supply voltages or any other analog output,

such as an analog temperature sensor or current-

sense amplifier. The device uses an internal 400-mV

reference

for

the

comparator

trip

value.

The

comparator set points can be set through external

resistor dividers. The LMV7231 has 6 outputs (CO1

to CO6) that signal an undervoltage or overvoltage

event for each power supply input. An output (AO) is

also provided to signal when any of the power supply

inputs have an overvoltage or undervoltage event.

This ability to signal an undervoltage or overvoltage

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 capability.

The 2.2-V to 5.5-V power supply voltage range, low

supply current, and input or output voltage range

above V+ make the LMV7231 ideal for a wide range

of power supply monitoring applications. Operation is

ensured over the –40°C to +125°C temperature

range. The device is available in a 24-pin WQFN

package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LMV7231

WQFN (24)

4.00 mm × 4.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Typical Application