National Semiconductor LM3089 FM Receiver IF System Data Manual
Summary
This critical integrated circuit provides an advanced IF System solution for modern FM receivers used in automotive, high-fidelity audio, and communications equipment. The chip manages essential functions including automatic gain control (AGC), AFC current generation, and sophisticated mute control capabilities. This technical guide offers deep specifications, detailed electrical characteristics, connection diagrams, and performance data necessary for engineers designing professional-grade radio receiver circuits.
Page 1 Text Content
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LM3089 FM Receiver IF System
Four internal carrier level detectors provide delayed
General Description
AGC signal to tuner, IF level meter drive current and in-
The LM3089 has been designed to provide all the major
terchannel mute control
functions required for modern FM IF designs of automotive,
AFC amplifier provides AFC current for tuner and/or
high-fidelity and communications receivers.
center tuning meters Improved operating and temperature performance, es-
Features
pecially when using high quadrature coils in narrow
Three stage IF amplifier/limiter provides m V (typ) band FM communications receivers b3 d B limiting sensitivity
No mute circuit latchup problems
Balanced product detector and audio amplifier provide
direct replacement for CA3089E
m V (typ) of recovered audio with distortion as low as 0.1% with proper external coil designs.
Connection Diagram
Dual-In-Line Package
TL/H/7149–2
Order Number LM3089N See NS Package Number N16E
C1995 National Semiconductor Corporation TL/H/7149 RRD-B30M115/Printed in U. S. A.
Page Summary Contents For National Semiconductor LM3089 FM Receiver IF System Data Manual
Manual Details
| Brand | National |
|---|---|
| Pages | 6 |
| File Size | 167.53 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What major control functions does the LM3089 provide for FM IF designs?
It provides all necessary terchannel mute control functions and supplies AFC current to tuners/receivers.
Does this device have a specified replacement part number?
Yes, the LM3089 is listed as a direct replacement for CA3089E.
How should I calculate power dissipation if the ambient temperature exceeds 25°C?
For temperatures above 25°C, power dissipation must be derated based on thermal resistance. Shoot to contact the National Semiconductor Sales office.