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PDF TDA4471 Data sheet ( Hoja de datos )
| Número de pieza | TDA4471 | |
| Descripción | Multistandard Video-IF and Quasi Parallel Sound Processing | |
| Fabricantes | TEMIC Semiconductors | |
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TELEFUNKEN Semiconductors
TDA4471
Multistandard Video-IF and Quasi Parallel Sound Processing
Description
The TDA4471 is an integrated bipolar circuit for full
multistandard 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. Specially two video IF inputs (2 x VIF) in
combination with one sound IF input (1 x SIF) and the
common pinning with the TDA4474 gives flexibility to
design a universal IF module for various applications.
Features
D 5V 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 is operating on picture carrier
frequency, the VCO frequency is switchable for
the 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 Parallel operation of the AM demodulator and
QPS mixer (for NICAM–L stereo sound)
D Two video IF inputs (2 x VIFin)
D One sound IF input (1 x SIFin)
D Package and relevant pinning is compatible with
the TDA4474; simplifies the design of an
universal IF module
Package:
30 pin shrink–dual–inline–plastic (SDIP30)
Rev. A1: 18.08.1995
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Preliminary Information
1 (16)
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TELEFUNKEN Semiconductors
TDA4471
modulation (e.g. B/G standard) the AF output signal
(Pin 27) is switched off by the standard switch.
Quasi–Parallel–Sound (QPS) mixer
The QPS mixer is realized by a multiplier. The SIF signal
(FM or NICAM carrier) is converted to the intercarrier
frequency by the regenerated picture carrier (quadrature
signal) which is provided from the VCO. The intercarrier
signal is fed via an output amplifier to Pin 26.
Standard switch
To have equal polarity of the video output signal the po-
larity can be switched in the demodulation stage in
accordance with the TV standard. Additional a standard
dependent DC level shift in the video amplifier delievers
the same sync level. Parallel the correct VIF–AGC is se-
lected for positive or negative modulated VIF signals. In
case of negative modulation (e.g. B/G standard) the AM
output signal is switched off. If the standard for positive
modulation (L standard) is selected the AM demodulator
and QPS mixer is active. This condition allows a parallel
operation of the AM sound signal and the NICAM–L ste-
reo sound.
L’ switch and VIF input selection
For positive modulated IF signals (L/L’ standard) Pin 16
works as L’ switch. With a control voltage at Pin 16 the
VCO frequency can be switched for setting to the required
L’ value (L’ standard). Also a fine adjustment of the L’–
VCO centre frequency is possible by a potentiometer. The
L’ switch is only active for positive modulated video IF
signals (standard switch in L mode). In this mode the
video IF input 2 (VIF2) is forced by the standard switch.
The possibility to select VIF1 input is given by connect-
ing VIF2 input (pin 10 or 11) via 10 k resistor to ground.
If negative modulation (B/G mode) is selected pin 16 op-
erates as an input selection switch for the two VIF inputs.
AFC switch
The AFC output signal at Pin 24 can be controlled by a
switching voltage at Pin 21. It is possible to select an AFC
output signal with rising– or falling AFC curve and to
switch off the AFC.
Internal voltage stabilizer
The internal bandgap reference ensures constant perfor-
mance independant of supply voltage and temperature.
Absolute maximum values
Reference point pin 4 (9, 18), unless otherwise specified
Parameters
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSupply voltage
Pin 25
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSupply current
Pin 25
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower dissipation, Vs = + 9 V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOutput currents
Pin 14, 26, 27
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁExternal voltages
Pins 1, 2, 5–8, 10–12,
14, 16, 19, 20, 26–28
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPins 17, 22, 23
Pins 13
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPins 15, 21, 24
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁJunction temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStorage temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁElectrostatic handling *)
All pins
Symbol
VS
IS
P
Iout
Vext
Tj
Tstg
VESD
Value
9.0
85
765
5
+ 4.5
+ 3.5
+ 13.5
Vs
+125
–25 to +125
300
Unit
V
mA
mW
mA
V
V
V
V
°C
°C
V
*) Equivalent to discharging a 200 pF capacitor through a 0 resistor
Operating Range
ÁÁÁSAÁÁÁumpbpÁÁÁileynvtÁÁÁoteltmaÁÁÁgpeerrÁÁÁaatnugrÁÁÁee25ÁÁÁParaÁÁÁmetÁÁÁersÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSyTVmÁÁÁamSbboÁÁÁl ÁÁÁÁÁÁÁÁÁ40.ÁÁÁV5toatol+uÁÁÁ98e.50ÁÁÁÁÁÁÁÁÁÁÁÁUÁÁÁ°VnCitÁÁÁÁÁÁ
Rev. A1: 18.08.1995
Preliminary Information
5 (16)
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TELEFUNKEN Semiconductors
TDA4471
AF Intercarrier
(AM) (FM/NICAM) AFC
Loop
comp.
+VS
n.c. n.c.
10 kW
AFC
switch
Loop
filter
6.8 pF
LVCO 150 W
CVCO
470 nF
Black
level
CRef
2.2 mF 470 nF
L’ and
VIF input
switch
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
TDA4471
12
SIF 1
3456
n.c.
10 mF
AGC (SIF)
789
2.2 mF
AGC (VIF)
VIF 1
10 11 12 13 14 15
VIF 2
10 kW
Standard switch
Tuner
(neg/pos)
delay Tuner Video
AGC
*) External L/C circuit (VCO: 38.9 MHz) with TOKO coil 7KN (9 turns, 0.12mm)
Figure 3. Test circuit
Rev. A1: 18.08.1995
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Preliminary Information
11 (16)
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TDA4471.PDF ] | |
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