LM3820 - National Semiconductor

LM3820 AM RADIO SYSTEM

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 capacitortuned portable radios The LM3820 is an improved replacement for the LM1820 Features Y Input protection diodes Y Goo.

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 Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability.