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TEMIC Semiconductors

TDA4470-M Datasheet Preview

TDA4470-M Datasheet

Multistandard Video-IF and Quasi Parallel Sound Processing

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TDA4470-M
Multistandard Video-IF and Quasi Parallel Sound Processing
Description
The TDA4470 is an integrated bipolar circuit for multi-
standard video/sound IF (VIF/SIF) signal processing in
TV/VCR and multimedia applications. The circuit
processes all TV video IF signals with negative
modulation (e.g., B/G standard), positive modulation
(e.g., L standard) and the AM, FM/NICAM sound IF
signals.
Features
D 5 V supply voltage; low power consumption
D Active carrier generation by FPLL principle
(frequency-phase-locked-loop) for true
synchronous demodulation
D Very linear video demodulation, good pulse response
and excellent intermodulation figures
D VCO circuit operates at picture carrier frequency, the
VCO frequency is switchable for L’-mode
D Alignment-free AFC without external reference
circuit, polarity of the AFC curve is switchable
D VIF-AGC for negative modulated signals (peak sync.
detection) and for positive modulation (peak white/
black level detector)
D Tuner AGC with adjustable take over point
D Alignment-free quasi parallel sound (QPS) mixer for
FM/NICAM sound IF signals
D Intercarrier output signal is gain controlled (necessary
for digital sound processing)
D Complete alignment-free AM demodulator with gain
controlled AF output
D Separate SIF-AGC with average detection
D Two independent SIF inputs
D Parallel operation of the AM demodulator and QPS
mixer (for NICAM-L stereo sound)
D Package and relevant pinning is compatible with the
single standard version TDA4472, which simplifies
the design of an universal IF module
Package: SDIP28, SO28
Ordering Information
Extended Type Number
TDA4470-MSD
TDA4470-MFLG3
Package
SDIP28
SO28
Remarks
Delivery in taped form
TELEFUNKEN Semiconductors
Rev. A2, 15-Oct-96
Preliminary Information
1 (16)




TEMIC Semiconductors

TDA4470-M Datasheet Preview

TDA4470-M Datasheet

Multistandard Video-IF and Quasi Parallel Sound Processing

No Preview Available !

TDA4470-M
Block Diagram
Offset
comp.
(optional)
Loop
filter
VCO
ÏÏL’ switch
6
ÏÏÏVIF 7
CAGC
8
ÏÏÏ15
CBL
Tuner
Take over
11
ÏÏÏÏ10
point
SIF 2
27
ÏÏÏ28
SIF input
ÏÏswitch
3ÏÏ
ÏÏÏSIF 1
1
2
Ï5
CAGC
Ï Ï ÏÏ ÏÏ26 18 20 21
FPLL
VCO
0° +
90° phase shift
VIF amp
AGC
(VIF)
Tuner
AGC
SIF amp
Video det.
Supply
FM det.
AGC
(SIF)
AM det.
Figure 1. Block diagram
Ï14
Control
19 AFC
Ï ÏÏswitch
Ï ÏÏAFC 22
ÏÏ AFC
12
ÏÏ Video
ÏÏ ÏÏÏÏStandard
13
Standard
switch
23
Ï ÏÏVS
Ï ÏÏ17
ÏÏ CRef
24
ÏÏ Intercarrier
(FM / NICAM)
ÏÏ25
Ï 4,9,16
95 10851
AF
(AM)
2 (16)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A2, 15-Oct-96


Part Number TDA4470-M
Description Multistandard Video-IF and Quasi Parallel Sound Processing
Maker TEMIC Semiconductors
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