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LM3089N
LM3089 FM Receiver IF System
TL/H/7149
LM3089
Receiver
System
September 1992
LM3089 FM Receiver IF System
General Description
The LM3089has been designedto provideallthe major
functions requiredfor modernFMIF designsof automotive,
high-fidelityand communications receivers.
Features Three stageIF amplifier/limiter provides12mV (typ)dB limiting sensitivity Balanced product detector and audio amplifier provide
400mV (typ)of recovered audio with distortionaslow 0.1% with proper externalcoil designs. Four internal carrier level detectors provide delayed
AGC signalto tuner,IF level meter drive currentandin-
terchannel mute control AFC amplifier provides AFC currentfor tuner and/or
center tuning meters Improved operating and temperature performance,es-
pecially when using highQ quadrature coilsin narrow
bandFM communications receiversNo mute circuit latchup problemsA direct replacementfor CA3089E
Connection Diagram
Dual-In-Line Package
TL/H/7149–2
Top View
Order Number LM3089N
See NSPackageNumber N16E
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
