LM146/LM346

Programmable Quad Operational Amplifiers

General Description

The LM146 series of quad op amps consists of four indepen-

dent, high gain, internally compensated, low power, pro-

grammable amplifiers. Two external resistors (R

the user to program the gain bandwidth product, slew rate,

supply current, input bias current, input offset current and in-

put noise. For example, the user can trade-off supply current

for bandwidth or optimize noise figure for a given source re-

sistance. In a similar way, other amplifier characteristics can

be tailored to the application. Except for the two program-

ming pins at the end of the package, the LM146 pin-out is

the same as the LM124 and LM148.

Features

(I

n Programmable electrical characteristics

n Battery-powered operation

n Low supply current:

350 µA/amplifier

n Guaranteed gain bandwidth product:

0.8 MHz min

n Large DC voltage gain:

120 dB

n Low noise voltage:

28

n Wide power supply range:

n Class AB output stage–no crossover distortion

n Ideal pin out for Biquad active filters

n Input bias currents are temperature compensated

Connection Diagram

PROGRAMMING EQUATIONS

Total Supply Current = 1.4 mA (I

Gain Bandwidth Product = 1 MHz (I

Slew Rate = 0.4V/µs (I

Input Bias Current

I

Dual-In-Line Package

DS005654-1

Top View

Order Number LM146J, LM146J/883,

LM346M or LM346N

See NS Package Number

J16A, M16A or N16A

May 1999

© 1999 National Semiconductor Corporation

DS005654

www.national.com