Overview

The LA3450 is a multifunctional, high-performance FM multiplex demodulator IC designed for high-grade FM stereo tuner use. The LA3450 features adjustment-free VCO, measure against adjacent channel interference, pilot canceler, low distortion (0.005), and high S/N (101dB).

Features

? Adjustmet-free VCO : Eliminates the need to adjust freerunning frequency.

? Good temperature characteristics of VCO : ±0.1 typ. for ±50°C change.

? No antibirdie filter is required because a measure is taken against adjacent channel interference.

? Less carrier leak 19kHz : 53dB 38kHz : 50dB

? The on-chip cal-tone signal generator facilitates application of recording calibrator.

? Low distortion MONO 0.005 STEREO 0.015

? High S/N 101dB typ. MONO IHF-A BPF

? High voltage gain FM : 10dB (gain variable) AM : 16dB (gain variable)

? Wide dynamic range Output level 3.3V typ. (THD=1, MONO)

Functions

? PLL multiplex stereo demodulator.

? Adjustment-free VCO.

? Measure against adjacent channel interference.

? Pilot canceler.

? Cal-tone signal generator.

? AM/FM input, AM/FM selector.

? Post amplifier (gain variable type).

? VCO stop.

? Right/left independent adjustment of separation (single adjustment available).

Applications

? Home stereo, CD, AV-use PLL FM MPX stereo demodulator IC with adjustment-free VCO.