+

-

INP

INN

HYSTP

HYSTN

OUT

0.1 PF

318.4 k:

1%

GND

V

+

9.86 k:

1%

1 M:

1%

1 M:

1%

LED

ADJUST

FOR LED

BRIGHTNESS

0

20

40

60

80

100

0

5

10

15

20

25

30

OVERDRIVE VOLTAGE (mV)

-40°C

25°C

85°C

125°C

V

+

= 12V

LMP7300

www.ti.com

SNOSAT7F – AUGUST 2007 – REVISED MARCH 2013

Micropower Precision Comparator and Precision Reference with Adjustable Hysteresis

Check for Samples: LMP7300

1

FEATURES

DESCRIPTION

The LMP7300 is a combination comparator and

2

•

reference

with

ideal

specifications

for

precision

•

Supply Current 13

μA

threshold detecting. The precision 2.048V reference

•

Propagation Delay 4

μs

comes with a 0.25% maximum error. The comparator

features micropower (35 µW), low offset voltage

•

Input Offset Voltage 0.3 mV

(0.75 mV max), and independent adjustable positive

•

CMRR 100 dB

and negative hysteresis.

•

PSRR 100 dB

Hysteresis control for the comparator is accomplished

•

Positive and Negative Hysteresis Control

through two external pins. The HYSTP pin sets the

•

Adjustable Hysteresis 1 mV/mV

positive hysteresis and the HYSTN pin sets the

negative hysteresis. The comparator design isolates

•

Reference Voltage 2.048V

•

Reference Voltage Accuracy 0.25%

hysteresis components. This isolation prevents any

•

Reference Voltage Source Current 1 mA

undesirable interaction allowing the IC to maintain a

precise threshold voltage during level detection.

•

Wide Supply Voltage Range 2.7V to 12V

•

Operating Temperature Range Ambient

−40°C

The combination of low offset voltage, external

to 125°C

hysteresis control, and precision voltage reference

provides an easy to use micropower precision

threshold detector.

APPLICATIONS

The LMP7300 open collector output makes it ideal for

•

Precision Threshold Detection

mixed voltage system designs. The output voltage

•

Battery Monitoring

•

Battery Management Systems

•

Zero Crossing Detectors

member of the LMP precision amplifier family.

Typical Application

Micropower Precision Battery Low Voltage Detector for 3

Cell Discharge Voltage

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.