Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOIC 8

LPC661

Low Power CMOS Operational Amplifier

General Description

The LPC661 CMOS operational amplifier is ideal for opera-

tion from a single supply. It features a wide range of operat-

ing supply voltage from +5V to +15V, rail-to-rail output swing

and an input common-mode range that includes ground.

Performance limitations that have plagued CMOS amplifiers

in the past are not a problem with this design. Input V

drift, and broadband noise as well as voltage gain (into 100

kΩ and 5 kΩ) are all equal to or better than widely accepted

bipolar equivalents, while the supply current requirement is

typically 55 µA.

This chip is built with National’s advanced Double-Poly

Silicon-Gate CMOS process.

See the LPC660 datasheet for a Quad CMOS operational

amplifier or the LPC662 data sheet for a Dual CMOS opera-

tional amplifier with these same features.

Features

(Typical unless otherwise noted)

n Rail-to-rail output swing

n Low supply current 55 µA

n Specified for 100 kΩ and5kΩloads

n High voltage gain 120 dB

n Low input offset voltage 3 mV

n Low offset voltage drift 1.3 µV/˚C

n Ultra low input bias current 2 fA

n Input common-mode range includes GND

n Operating range from +5V to +15V

n Low distortion 0.01% at 1 kHz

n Slew rate 0.11 V/µs

Applications

n High-impedance buffer

n Precision current-to-voltage converter

n Long-term integrator

n High-impedance preamplifier

n Active filter

n Sample-and-Hold circuit

n Peak detector

Application Circuits

10 Hz Bandpass Filter

DS011227-21

=10Hz

Q = 2.1

Gain = 18.9 dB

1 Hz Low-Pass Filter

(Maximally Flat, Dual Supply Only)

DS011227-23

August 2000

LPC661 Low Power CMOS Operational Amplifier