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PDF LM3089 Data sheet ( Hoja de datos )
| Número de pieza | LM3089 | |
| Descripción | LM3089 FM Receiver IF System | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM3089 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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September 1992
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)
b3 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
Y Four internal carrier level detectors provide delayed
AGC signal to tuner IF level meter drive current and in-
terchannel mute control
Y AFC amplifier provides AFC current for tuner and or
center tuning meters
Y Improved operating and temperature performance es-
pecially when using high Q quadrature coils in narrow
band FM communications receivers
Y No mute circuit latchup problems
Y A direct replacement for CA3089E
Connection Diagram
Dual-In-Line Package
Top View
Order Number LM3089N
See NS Package Number N16E
TL H 7149 – 2
C1995 National Semiconductor Corporation TL H 7149
RRD-B30M115 Printed in U S A
1 page  
Typical Performance Characteristics
Supply Current (I11) vs
Supply Voltage (V11)
Reference Voltage AGC and
Meter Output vs Supply Voltage
Mute Control Output (Pin 12)
vs IF Input Signal
Typical Audio Attenuation
(Pin 6) vs Mute Input
Voltage (Pin 5)
DC Test Circuit
TL H 7149 – 5
AC Test Circuit
KAC-K2318HM
TL H 7149 – 6
TL H 7149 – 7
For single tuned dectector coil
LO tunes with 100 pF at 10 7 MHz
QUL (unloaded) j 75
QL (loaded) j 13 for V9 j 150 mVrms
For double tuned detector coil
QULPRI e QULSEC j 75
kQ j 0 7 for V9 j 150 mVrms
Note
The recovered audio output voltage will be approximately 0 5 dB less when
using the double tuned detector coil
For proper operation of the mute circuit the RF voltage at pin 9 should be
150 mVrms g30 mV
TL H 7149 – 8
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet LM3089.PDF ] | |
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