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参数资料
| 型号： | TDA7479D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封装： | SOP-16 |
| 文件页数： | 1/8页 |
| 文件大小： | 174K |
| 代理商： | TDA7479D |
1/8
TDA7479
December 2004
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
■ ARI (SK INDICATION) AND RDS SIGNAL
QUALITY OUTPUT
■ 4.332MHz CRYSTAL OSCILLATOR(8.664 and
17.328MHz OPTIONAL)
■ LOW NOISE CMOS TECHNOLOGY
■ LOW RADIATION
2
DESCRIPTION
The TDA7479 recovers the additional inaudible RDS
information which is transmitted by FM radio broad-
casting 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 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.
Outputs for RDS signal quality and ARI indication are
also present.
SINGLE CHIP RDS DEMODULATOR + FILTER
Figure 2. Block Diagram
2nd ORDER
ANTIALIASING
FILTER
8th ORDER
SC-BANDPASS
FILTER
MPX
4
270pF
-
+
8
FILOUT
12
VS
3
VREF
100nF
10
F
OSCILLATOR &
DIVIDER
57KHz PLL
FAST ARI
INDICATOR
POLARITY
BIPHASE DEC.
INTEGRAL
BIPHASE DEC.
1187.5Hz
PLL
MUX
0
1
DIFF. DECODER
TEST LOGIC
QUAL DET.
6
GND
11
EXTRES
14
13
5
9
16
7
1
D97AU751A
TM
10
RDDA
2
QUAL
ARI
RDCL
FSEL
OSEL
OSCOUT
OSCIN
4.332MHz
C2 47pF
C1 27pF
15
T57
Figure 1. Packages
Table 1. Order Codes
Part Number
Package
TDA7479D
SO16
TDA7479AD
TSSOP16
SO16
TSSOP16
Rev. 6
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