NSC LM3089N Datasheet

LM3089 FM Receiver IF System

General Description

The LM3089 has been designed to provide all the major
functions required for modern FM IF designs of automotive,
high-fidelity and communications receivers.

Features

Y

Three stage IF amplifier/limiter provides 12 mV (typ)

b

3 dB limiting sensitivity

Y

Balanced product detector and audio amplifier provide
400 mV (typ) of recovered audio with distortion as low
as 0.1% with proper external coil designs.

Connection Diagram

Dual-In-Line Package

Y

Y

Y

Y

Y

LM3089 FM Receiver IF System

September 1992

Four internal carrier level detectors provide delayed
AGC signal to tuner, IF level meter drive current and in­terchannel mute control

AFC amplifier provides AFC current for tuner and/or
center tuning meters

Improved operating and temperature performance, es­pecially when using high Q quadrature coils in narrow
band FM communications receivers

No mute circuit latchup problems
A direct replacement for CA3089E

Top View

TL/H/7149– 2

Order Number LM3089N

See NS Package Number N16E

C

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

TL/H/7149

Block Diagram

TL/H/7149– 1

Toko America

1250 Feehanville Drive

Mount Prospect, IL 60056

[phone]

2