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E-TDA7478AD

P1-P3P4-P6P7-P9P10-P11
June 2011 Doc 10679 Rev 3 1/11
11
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.
The device is made up of two sections: a
cascaded antialiasing + switched capacitors 8
th
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.
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TSSOP16
Table 1. Device summary
Order code Package Packing
E-TDA7478AD
TSSOP16
Tube
E-TDA7478ADTR Tape and reel
www.st.com
Contents TDA7478
2/11 Doc 10679 Rev 3
Contents
1 Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Output timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Oscillator controls (FSEL, OSEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TDA7478 Block diagram and pins description
Doc 10679 Rev 3 3/11
1 Block diagram and pins description
1.1 Block diagram
Figure 1. Block diagram
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P1-P3P4-P6P7-P9P10-P11

E-TDA7478AD

Mfr. #:
Buy E-TDA7478AD
Manufacturer:
STMicroelectronics
Description:
Audio DSPs Single chip RDS Demodulato
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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