TDA7331D STMicroelectronics, TDA7331D Datasheet

Audio DSPs RDS Demodulator

TDA7331D

Manufacturer Part Number
TDA7331D
Description
Audio DSPs RDS Demodulator
Manufacturer
STMicroelectronics
Datasheet

Specifications of TDA7331D

Mounting Style
SMD/SMT
Package / Case
SO-20
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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DESCRIPTION
The
TDA7330B, recovers the additional inaudible
RDS information which is transmitted by FM radio
broadcasting stations and operates in accord-
ance with the EBU (European Broadcasting Un-
ion) specifications.
The device is made up of two sections: a cas-
BLOCK DIAGRAM and TEST CIRCUIT
September 2003
VERY HIGH RDS DEMODULATION QUALITY
WITH IMPROVED DIGITAL SIGNAL PROC-
ESSING
HIGH PERFORMANCE, 57KHz BANDPASS
FILTER (8th ORDER)
PURELY DIGITAL RDS DEMODULATION
WITHOUT EXTERNAL COMPONENTS
ARI INDICATION AND RDS SIGNAL QUAL-
ITY OUTPUTS
4.332MHz CRYSTAL OSCILLATOR
(8.664 and 17.328MHz SELECTABLE OP-
TIONS)
LOW NOISE CMOS TECHNOLOGY
LOW RADIATION
TDA7331,
MPX
100nF
V
10 F
S
®
270pF
FILOUT
VREF
an
1
4
16
2
GND
5
improved
SINGLE CHIP RDS DEMODULATOR + FILTER
ANTIALIASING
+
-
2nd ORDER
SC-BANDPASS
FILTER
8th ORDER
FILTER
version
of
6,7,8,17
11
N.C.
T57
BIPHASE DEC.
BIPHASE DEC.
caded antialiasing + switched capacitors band-
pass filter for precise RDS band selection and a
demodulating section that performs the extraction
od RDS data stream (RDDA) and clock (RDCL),
to be furher processed by a suitable RDS de-
coder.
Outputs for RDS signal quality and ARI indication
are also present.
INDICATOR
57KHz PLL
POLARITY
INTEGRAL
FAST ARI
C1 27pF
OSCIN
OSCILLATOR &
4.332MHz
DIVIDER
10
TDA7331
DIP20
ORDERING NUMBERS:
0
1
C2 47pF
OSCOUT
9
MUX
EXTRES
20
QUAL DET.
1187.5Hz
DIFF. DECODER
PLL
TEST LOGIC
TDA7331
TDA7331D
D97AU686B
SO20
18
12
15
14
13
19
3
OSEL
FSEL
RDCL
ARI
QUAL
RDDA
TM
1/7

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TDA7331D Summary of contents

Page 1

... OSCILLATOR & FILTER 8th ORDER 57KHz PLL SC-BANDPASS FILTER FAST ARI INDICATOR - POLARITY BIPHASE DEC. + INTEGRAL BIPHASE DEC. 6,7,8,17 N.C. TDA7331 DIP20 SO20 ORDERING NUMBERS: TDA7331 TDA7331D 4.332MHz C2 47pF OSCOUT DIVIDER 12 1187.5Hz PLL 15 14 QUAL DET MUX DIFF. DECODER 1 19 TEST LOGIC ...

Page 2

TDA7331 ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage S T Operating Temperature Range op T Storage Temperature stg PIN FUNCTION o N pin Name 1 MPX RDS input signal 2 VREF Reference voltage 3 OSEL Oscillator selector pin: - open, ...

Page 3

THERMAL DATA Symbol R Thermal Resistance Junction-Ambient th j-amb ELECTRICAL CHARACTERISTICS (T Symbol Parameter V Supply voltage S I Supply current S FILTER f Center frequency C BW 3dB Bandwidth G Gain A Attenuation R Input impedance of MPX I ...

Page 4

TDA7331 Figure 1. RDS timing diagram OUTPUT TIMING The RDS (1187.5Hz) output clock on RDCL line is synchronized to the incoming data. According to the internal PLL lock condition data change can result on the falling or on the rising ...

Page 5

DIM. MIN. TYP. MAX. MIN. a1 0.254 0.010 B 1.39 1.65 0.055 b 0.45 b1 0.25 D 25.4 E 8.5 e 2.54 e3 22.86 F 7.1 I 3.93 L 3.3 Z 1.34 inch MECHANICAL DATA TYP. MAX. 0.065 0.018 ...

Page 6

TDA7331 mm DIM. MIN. TYP. MAX. A 2.35 2.65 A1 0.1 0.3 B 0.33 0.51 C 0.23 0. 7.4 7 10.65 h 0.25 0.75 L 0.4 1.27 K 0˚ (min.)8˚ (max.) B ...

Page 7

... 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. ...

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