TDA7478

TDA7478 Single chip RDS demodulator Features ■ Very high RDS demodulation quality with improved digital signal processing ■ High performance, 57 kHz bandpass filter (8th order) ■ Filter adjustment free and without external components ■ Purely digital RDS demodulation without external components ■ RDS signal quality output ■ 4.332 MHz crystal oscillator (8.664 MHz optionaL) ■ Low noise cmos technologY ■ Low radiation Description The TDA7478 recovers the additional inaudible RDS information which is transmitted by FM radio broadcasting stations and operates in accordance with the EBU (European Broadcasting Union) specifications. *$3*36 TSSOP16 The device is made up of two sections: a cascaded antialiasing + switched capacitors 8th bandpass filter for precise RDS band selection and a demodulating section that performs the extraction od RDS data stream (RDDA) and clock (RDCL), to be further processed by a suitable RDS decoder. Output for RDS signal quality is also present. Table 1. Device summary Order code E-TDA7478AD E-TDA7478ADTR Package TSSOP16 Packing Tube Tape and reel September 2013 Doc 10679 Rev 4 1/11 www.st.com 11 Contents Contents TDA7478 1 Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....