Overview

The LA1806 is a characteristics-improved version of the LA1811, with the same pin assignment and package as those o the LA1811. Improvements are made on the following points:

.Separation (35 dB→48 dB) and its dependence on free-running frequency (Refer to the separate catalog of the LA1805.)

.FM main distortion (0.8%→0.45%)

.AM detection output (approximately 5 dB increased) The constants on five external parts are changed as LA1811

Functions

.FM-IF: IF amplifier quadrature detector, soft muting, tuning indicator

. MPX: PLL stereo decoder, stereo indicator, forced monaural, VCO stop

. AM: RF amplifier, MIX, OSC (with ALC), IF amplifier, detector, AGC, tuning indicator

Features

.FM/AM/MPX functions contained on a single chip

.Minimum number of external parts required

.On-chip FM muting function

.High sensitivity

.Less carrier leak of MPX