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Description

The TDA7421N is a high-performance tuner circuit which integrates AM and FM sections, PLL frequency sinthesizer and IF counter on a single chip.

Use of BICMOS technology allows the implementation of tuning functions with a minimum of external components.Value spread of external components can be fully compensated by means of on-chip electrical adjustment controlled by external µP.

Pinouts : 

Features

1. HIGH PERFORMANCE FRONT-END IC FOR AM/FM RECEIVERS

2. FULLY INTEGRATED HIGH-SPEED PLL FOR OPTIMIZED RDS APPLICATIONS

3. FM MPX/AM AUDIO OUTPUT, 450kHz AM IF OUTPUT FOR STEREO AM APPLICATIONS

4. AM DOUBLE CONVERSION ARCHITECTURE

Block Diagram