E-TDA7478ADTR

更新时间： 2024-01-08 04:53:22

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		消费电路商用集成电路光电二极管
页数	文件大小	规格书
8页	171K
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E-TDA7478ADTR 数据手册

TDA7478

SINGLE CHIP RDS DEMODULATOR

1 FEATURES

Figure 1. Packages

■ VERY HIGH RDS DEMODULATION QUALITY

WITH IMPROVED DIGITAL SIGNAL

PROCESSING

■ HIGH PERFORMANCE, 57KHz BANDPASS

SO16

TSSOP16

FILTER (8th ORDER)

■ FILTER ADJUSTMENT FREE AND WITHOUT

Table 1. Order Codes

EXTERNAL COMPONENTS

Part Number

TDA7478D

Package

SO16

■ PURELY DIGITAL RDS DEMODULATION

WITHOUT EXTERNAL COMPONENTS

E-TDA7478AD

TSSOP16

■ RDS SIGNAL QUALITY OUTPUT

■ 4.332MHz CRYSTAL OSCILLATOR(8.664MHz

OPTIONAL)

EBU (European Broadcasting Union) specifications.

The device is made up of two sections: a cascaded

antialiasing + switched capacitors 8 bandpass filter

■ LOW NOISE CMOS TECHNOLOGY

■ LOW RADIATION

for precise RDS band selection and a demodulating

section that performs the extraction od RDS data

stream (RDDA) and clock (RDCL), to be further pro-

cessed by a suitable RDS decoder.

2 DESCRIPTION

The TDA7478 recovers the additional inaudible RDS

information which is transmitted by FM radio broad-

casting stations and operates in accordance with the

Output for RDS signal quality is also present.

Figure 2. Block Diagram

C1 27pF 4.332MHz C2 47pF

T57

OSCIN

OSCOUT

MPX

2nd ORDER

ANTIALIASING

FILTER

270pF

OSEL

FSEL

OSCILLATOR &

DIVIDER

RDCL

1187.5Hz

PLL

8th ORDER

SC-BANDPASS

FILTER

57KHz PLL

FILOUT

N.U.

QUAL

QUAL DET.

V_S

100nF

POLARITY

BIPHASE DEC.

VREF

MUX

DIFF. DECODER

RDDA

10µF

INTEGRAL

BIPHASE DEC.

TEST LOGIC

EXTRES

D03AU1490

GND

Rev. 2

1/8

November 2004

12 3 4 5 6 7 8

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