Datasheet

LPC662

Low Power CMOS Dual Operational Amplifier

General Description

The LPC662 CMOS Dual operational amplifier is ideal for

operation from a single supply. It features a wide range of

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

in addition to 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 and5kΩ) are all equal to or better than widely

accepted bipolar equivalents, while the power supply

requirement is typically less than 0.5 mW.

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

Silicon-Gate CMOS process.

See the LPC660 datasheet for a Quad CMOS operational

amplifier and LPC661 for a single CMOS operational

amplifier with these same features.

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

Features

n Rail-to-rail output swing

n Micropower operation (

0.5 mW)

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 includes GND

n Operating range from +5V to +15V

n Low distortion 0.01% at 1 kHz

n Slew rate 0.11 V/µs

n Full military temperature range available

Application Circuit

Howland Current Pump

DS010548-23

August 2000

LPC662 Low Power CMOS Dual Operational Amplifier