Part # TDA7421N datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS


Part Details:

TDA7421N AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS PRELIMINARY DATA s HIGH PERFORMANCE FRONT-END IC FOR AM/FM RECEIVERS s FULLY INTEGRATED HIGH-SPEED PLL FOR OPTIMIZED RDS APPLICATIONS s FM MPX/AM AUDIO OUTPUT, 450kHz AM IF OUTPUT FOR STEREO AM APPLICATIONS s AM DOUBLE CONVERSION ARCHITECTURE TQFP64 s AM/FM STATION DETECTOR AND DIGITAL IF-COUNTER ORDERING NUMBER: TDA7421N s SINGLE FREQUENCY REFERENCE FOR BOTH AM AND FM trical adjustment controlled by external µP. s FULL ELECTRICAL ADJUSTMENT The FM quality detection circuit, in conjunction with s I2C-BUS PROGRAMMABLE the digital IF counter, enables the stop-station func-tion in "seek" mode and MPX mute during reception. DESCRIPTION The combination of programmable level detector and The TDA7421N is a high-performance tuner circuit IF counter allows reliable AM stop-station perfor- which integrates AM and FM sections, PLL frequency mance. sinthesizer and IF counter on a single chip. The Automatic Gain Control (AGC) operates on dif- Use of BICMOS technology allows the implementa- ferent signal bandwidths in order to optimize sensitiv- tion of tuning functions with a minimum of external ity and dynamic range. components.Value spread of external components I2C-bus controls functions such as AGC, amplifier can be fully compensated by means of on-chip elec- 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 IN- RF 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 - 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49


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TDA7421N.pdf Datasheet