TDA7421 - ST Microelectronics

TDA7421 AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS

The TDA7421 is a high performance tuner circuit that integrates AM/FM sections, IF counter and PLL synthesizer 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 PINS CONNECTION AM AGC1 RF AMP FM IF AMP1 OUT FM IF AMP1 IN + FM IF AMP2.

Features

n order to improve sensitivity and dynamic range. I2C bus allows to control selected functions of the tuner (AGC and amplifiers gain, PLL and counters operation modes). AM AGC1 TC MIX OUT + MIX OUT - 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 AM MIX1 IN AM MIX1 IN + FM MIX IN FM MIX IN + FM RF AGC IN FM AGC OUT RF GND VCO B VCO E OSC GND XTAL D XTAL G OSC VCC FM ANT ADJ FM RF ADJ PLL VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 DIG GND IFC SSTOP AM STEREO OUT CLN GND IF2 GND AM AGC2 TC PLL GND PLL VREF DIG VDD AM DET SLEEP SDA LP OUT LP IN.