LMV7251/LMV7255

1.8V Low Voltage Comparator with Rail-to-Rail Input

General Description

The LMV7251/LMV7255 are rail-to-rail input low voltage

comparators, which can operate at supply voltage range of

1.8V to 5.0V. The LMV7251/LMV7255 are available in space

saving SC-70 or SOT23-5 packages. These comparators

are ideal for low voltage and space critical designs.

The LMV7251 features a push-pull output stage. This feature

allows operation with minimum power consumption when

driving a load.

The LMV7255 features an open drain output. This allows the

connection of an external resistor at the output. The output of

the comparator can be used as a level shifter.

The IC’s are built with National Semiconductor’s advance

Submicron

Silicon-Gate

BiCMOS

process.

The

LMV7251/LMV7255 have bipolar inputs for improved noise

performance and CMOS outputs for better rail-to-rail output

performance.

Features

(V

n

Single or Dual Supplies

n

Low supply voltage

1.8V to 5.0V

n

Ultra low supply current

11µA

n

Low input bias current

14nA

n

Low input offset current

200pA

n

Low input offset voltage

+/−0.3mV

n

Response time

670ns (20mV overdrive)

n

Input common mode voltage

0.1V beyond rails

Applications

n

Mobile communications

n

Laptops and PDA’s

n

Battery powered electronics

n

General purpose low voltage applications

Typical Circuit

Connection Diagram

DS200057-2

FIGURE 1. Threshold Detector

DS200057-1

Top View

January 2001

© 2001 National Semiconductor Corporation

DS200057

www.national.com