LMV7271/LMV7275/LMV7272

Single & Dual, 1.8V Low Power Comparators with

Rail-to-Rail Input

General Description

The LMV727X are rail-to-rail input low power comparators,

which are characterized at supply voltage 1.8V, 2.7V and

5.0V. They consume only 9uA supply current per channel

while achieving a 800ns propagation delay.

The LMV7271/LMV7275 (single) are available in SC70 and

SOT23 packages. The LMV7272 (dual) is available in micro

SMD package. With these tiny packages, the PC board area

can be significantly reduced. They are ideal for low voltage,

low power and space critical designs.

The LMV7271/LMV7272 both feature a push-pull output

stage which allows operation with minimum power consump-

tion when driving a load. The LMV7275 features an open

drain output stage that allows for wired-OR configurations.

The open drain output also offers the advantage of allowing

the output to be pulled to any voltage up to 5V, regardless of

the supply voltage of the LMV7275.

The LMV727X are built with National Semiconductor’s ad-

vance submicron silicon-gate BiCMOS process. They all

have bipolar inputs for improved noise performance and

CMOS outputs for rail-to-rail output swing.

Features

(V

n

Single or Dual Supplies

n

Ultra low supply current

9µA per channel

n

Low input bias current

10nA

n

Low input offset current

200pA

n

Low guaranteed V

OS

4mV

n

Propagation delay

880ns (20mV overdrive)

n

Input common mode voltage range

0.1V beyond rails

n

LMV7272 is available in micro SMD package

Applications

n

Mobile communications

n

Laptops and PDA’s

n

Battery powered electronics

n

General purpose low voltage applications

Typical Circuit

Part Number Single/Dual

Package

Output

LMV7271

Single

SC70,

SOT23

Push/Pull

LMV7272

Dual

micro SMD

Push/Pull

LMV7275

Single

SC70,

SOT23

Open Drain

20064024

FIGURE 1. Threshold Detector

September 2003

© 2003 National Semiconductor Corporation

DS200640

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