LM3820_89 Datasheet, PDF (1/6 Pages) National Semiconductor (TI) – AM Radio System

February 1989
LM3820 AM Radio System
General Description
The LM3820 is a 3-stage AM radio IC consisting of an RF
amplifier oscillator mixer IF amplifier AGC detector and
zener regulator
The device was originally designed for use in slug-tuned
auto radio applications but is also suitable for capacitor-
tuned portable radios
The LM3820 is an improved replacement for the LM1820
Features
Y _{Input protection diodes}
Y _{Good control on sensitivity}
Y _{Improved S N and tweet}
Y _{Versatile building-block approach}
Y _{Gain-controlled RF stage}
Y _{Cascode IF amplifier}
Y _{Regulated supply}
Y _{Pin compatible with LM1820}
Connection Diagram
Dual-In-Line Package
Circuit Schematic
Order Number LM3820N
See NS Package Number N14A
TL H 7967 – 1
C1995 National Semiconductor Corporation TL H 7967
TL H 7967 – 2
RRD-B30M115 Printed in U S A