TDA7421N - STMicroelectronics

TDA7421N AM/FM TUNER

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 elec- TQFP64 ORDERING NU.

Features

seek” mode and MPX mute during reception. The combination of programmable level detector and IF counter allows reliable AM stop-station performance. The Automatic Gain Control (AGC) operates on different signal bandwidths in order to optimize sensitivity and dynamic range. I2C-bus controls functions such as AGC, amplifier gains, PLL and counter settings. PIN CONNECTIONS AM AGC1 PIN AM AGC1 RF AMP AM AGC1 TC MIX OUT + MIX OUT FM IF AGC IN AM MIX2 IN + AM MIX2 INRF VCC AM MIX2 OUT AM SMETER TC FM IF AMP1 IN + FM IF AMP1 IN FM IF AMP1 OUT FM IF AMP2 IN + FM IF AMP2 IN - AM MIX1 IN AM MIX1 IN +.