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零件编号 | E-TDA7478AD | ||
描述 | SINGLE CHIP RDS DEMODULATOR | ||
制造商 | STMicroelectronics | ||
LOGO | |||
1 Page
TDA7478
SINGLE CHIP RDS DEMODULATOR
1 FEATURES
■ VERY HIGH RDS DEMODULATION QUALITY
WITH IMPROVED DIGITAL SIGNAL
PROCESSING
■ HIGH PERFORMANCE, 57KHz BANDPASS
FILTER (8th ORDER)
■ FILTER ADJUSTMENT FREE AND WITHOUT
EXTERNAL COMPONENTS
■ PURELY DIGITAL RDS DEMODULATION
WITHOUT EXTERNAL COMPONENTS
■ RDS SIGNAL QUALITY OUTPUT
■ 4.332MHz CRYSTAL OSCILLATOR(8.664MHz
OPTIONAL)
■ LOW NOISE CMOS TECHNOLOGY
■ LOW RADIATION
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
Figure 2. Block Diagram
Figure 1. Packages
SO16
Table 1. Order Codes
Part Number
TDA7478D
E-TDA7478AD
TSSOP16
Package
SO16
TSSOP16
EBU (European Broadcasting Union) specifications.
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 pro-
cessed by a suitable RDS decoder.
Output for RDS signal quality is also present.
C1 27pF 4.332MHz C2 47pF
MPX
270pF
4
8
FILOUT
VS
100nF
10µF
12
VREF 3
2nd ORDER
ANTIALIASING
FILTER
8th ORDER
SC-BANDPASS
FILTER
-
+
T57
15
OSCIN
13
OSCOUT
14
OSCILLATOR &
DIVIDER
57KHz PLL
1187.5Hz
PLL
QUAL DET.
5
OSEL
9
FSEL
16
RDCL
7
N.U.
1
QUAL
POLARITY
BIPHASE DEC.
INTEGRAL
BIPHASE DEC.
0
MUX
1
DIFF. DECODER
2
RDDA
TEST LOGIC
10
TM
November 2004
6
GND
11
EXTRES
D03AU1490
Rev. 2
1/8
TDA7478
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2004 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
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页数 | 8 页 | ||
下载 | [ E-TDA7478AD.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
E-TDA7478AD | SINGLE CHIP RDS DEMODULATOR | STMicroelectronics |
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