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TDA4474
Multistandard Video-IF and Quasi Parallel Sound Processing
Description
The TDA4474 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. Four IF inputs (2 x VIF plus 2 x SIF) and the common pinning with TDA4471 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 D Alignment-free quasi parallel sound (QPS) mixer
for FM/NICAM sound IF signals
D Intercarrier output signal is gain controlled
(frequency-phase-locked-loop) synchronous demodulation
for
true
(necessary for digital sound processing)
D Complete alignment-free AM demodulator with
D Very linear video demodulation, good pulse
response and excellent intermodulation figures
D VCO circuit is operating on picture carrier
gain controlled AF output
D Separate SIF-AGC with average detection D Parallel operation of the AM demodulator and
frequency, the VCO frequency is switchable for the L' mode
D Alignment-free AFC without external reference
QPS mixer (for NICAM-L stereo sound)
D Four IF inputs (2 x VIFin and 2 x SIFin) D Package and relevant pinning is compatible with
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
the TDA4471; simplifies the design of an universal IF module
Package: 30 pin shrink-dual-inline-plastic (SDIP30)
Rev. A1: 17.08.1995
Preliminary Information
1 (17)
TDA4474
Offset comp. (optional) Loop filter VCO
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VIF 2
AFC VIF amp
11
6
VIF 1
7
CAGC
8
Video det. AGC (VIF) Standard
17
CBL
Tuner
13
12
Tuner AGC FM det.
Supply
Take over point SIF 2
29
30
SIF amp
SIF input switch 3
1
5
AM det.
CAGC
94 7901
Figure 1. Block diagram
2 (17)
Preliminary Information
II II II
SIF 1
2
AGC (SIF)
I II I II II II II II I II
II II II II I II
II II II II II II I II I II II II II II II II II II II II II II II II II II
10
II I II II II I II II
FPLL 0 90 VCO + phase shift
28
20
22
23
Control 21 24
I I
L' switch and VIF input switch
16
AFC switch AFC
14
Video
15
Standard switch VS
25
19
CRef
26
Intercarrier (FM / NICAM)
27
AF (AM)
4,9,18
Rev. A1: 17.08.1995
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TDA4474
30 Vi,SIF2 29 Vi,SIF2 28 Rcomp 27 Vo,AM 26 Vo,FM 25 VS 24 VAFC 23 VVCO
Pin Description
Vi,SIF1 1 Vi,SIF1 2 VSW GND CAGC Vi,VIF1 Vi,VIF1 CAGC GND 3 4 5 6 7 8 9
22 VVCO 21 20 19 18 17 16
94 8680
Vi,VIF2 10 Vi,VIF2 11 Rtop 12 Itun 13 Vo,vid 14 VSW(stand.) 15
Figure 2. Pin description
VSW LF CRef GND CBL VSW(L')
Rev. A1: 17.08.1995
Preliminary Information
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3 (17)
Pin 1, 2 3 4 5 6, 7 8 9 10, 11 12 13 14 15 16 17 18 19 20 21 22, 23 24 25 26 27 28 29, 30
Symbol Vi,SIF1 VSW GND CAGC Vi,VIF1 CAGC GND Vi,VIF2 Rtop Itun Vo,vid VSW VSW CBL GND CRef LF VSW VVCO VAFC VS Vo,FM Vo,AM Rcomp Vi,SIF2
Function SIF1 input (symmetrical) SIF input selector switch Ground SIF-AGC (time constant) VIF1 input (symmetrical) VIF-AGC (time constant) Ground VIF2 input (symmetrical) Take over point, tuner AGC Tuner AGC output current Video output Standard switch L'-/VIF input selector switch Capacitor - black level detector Ground Internal reference voltage Loop filter AFC switch VCO circuit AFC output Supply voltage Intercarrier output AF output - AM sound Offset compensation SIF2 input (symmetrical)
TDA4474
Circuit Description
Vision IF Amplifier
The video IF signal (VIF) is fed through a external SAW filter to one of the two VIF inputs (Pins 6-7 or 10-11). The selection of VIF inputs is controlled by Pin 16 in combination with the standard switch. With a minimal external expense it is possible to switch between two different SAW filters. Both VIF inputs features excellent cross-talk attenuation and an input impedance which is independent from the switching condition. The VIF amplifier consists of three AC-coupled amplifier stages. Each differential amplifier is gain controlled by the automatic gain control (VIF-AGC). Output signal of the VIF amplifier is applied to the FPLL carrier generation and the video demodulator.
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switched for setting to the required L' value This function is active when "L mode" is selected by the standard switch. The optional potentiometer at Pin 28 allows an offset compensation of the VCO phase for improved sound quality (fine adjustment). Without a potentiometer (open circuit at Pin 28) this offset compensation is not active. The oscillator signal passes a phase shifter and supplies the in-phase signal (0) and the quadrature signal (90) of the generated picture carrier.
Video Demodulation and Amplifier
The video IF signal, which is applied from the gain controlled IF amplifier, is multiplied with the inphase component of the VCO signal. The video demodulator is designed for low distortion and large bandwidth. The demodulator output signal passes an integrated low pass filter for attenuation of the residual vision carrier and is fed to the video amplifier. The video amplifier is realized by an operational amplifier with internal feedback and 8 MHz bandwidth (-3dB). A standard dependent DC level shift in this stage delivers the same sync level for positive and negative modulation. An additional noise clipping is provided. The video signal is fed to VIF-AGC and to the video output buffer. This amplifier with 6dB gain offers easy adaption of the sound trap. For nominal video IF modulation the video output signal at Pin 14 is 2 V (peak to peak value).
Tuner- and VIF-AGC
At Pin 8 the VIF-AGC charges/discharges the AGC capacitor to generate a control voltage for setting gain of VIF amplifier and tuner in order to keep the video output signal at a constant level. Therefore in case of negative modulated signals (e.g. B/G standard) the sync level of the demodulated video signal is the criterion for a fast charge/discharge of the AGC capacitor. For positive modulation (e.g. L standard) the peak white level of video signal controls the charge current. In order to reduce reaction time for positive modulation, where a very large time constant is needed, an additional black level detector (Pin 17) controls the discharge current in the event of decreasing VIF input signal. The AGC voltage is transferred to an internal control signal and fed to the tuner AGC to generate the tuner AGC current at Pin 13 (open collector output). Take over point of the tuner AGC can be adjusted at Pin 12 by a potentiometer or an external DC voltage (from interface circuit or microprocessor).
Sound IF Amplifier and SIF-AGC
The SIF amplifier is nearly identical with the 3-stage VIF amplifier. The first amplifier stage exists twice and is switchable by a control voltage at Pin 3. Therefore with a minimal external expense it is possible to switch between two different SAW filters. Both SIF inputs features excellent cross-talk attenuation and an input impedance which is independent from the switching condition. Each differential amplifier is controlled by the automatic gain control for the sound IF path (SIF-AGC). Output signal of the SIF amplifier is applied to the mixer for FM/NICAM signals and the demodulator for AM sound signals. The SIF-AGC is related to the average level of AM- or FM-carrier and controls the SIF amplifier to provide a constant SIF signal to the AM demodulator and QPS mixer.
FPLL, VCO and AFC
The FPLL circuit (frequency phase locked loop) consists of a frequency and phase detector to generate control voltage for the VCO tuning. In the locked mode the VCO is controlled by the phase detector and in unlocked mode the frequency detector is superimposed. The VCO operates with an external resonance circuit (L and C parallel) and is controlled by internal varicaps. The VCO control voltage is also converted to a current and represents the AFC output signal at Pin 24. With the AFC switch (pin 21) three operating conditions of the AFC are possible: AFC curve "rising" or "falling" and AFC "off". A practicable VCO alignment of the external coil is the adjustment to zero AFC output current at Pin 24. At centre frequency the AFC output current is equal to zero. Furthermore, at Pin 16, the VCO centre frequency can be 4 (17)
AM Demodulator
The alignment-free AM demodulator is realized by a synchronous detector. The modulated SIF signal from the Rev. A1: 17.08.1995
Preliminary Information
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SIF amplifier output is multiplied in phase with the limited SIF signal (AM is removed). The AF signal of the demodulator output is fed to the output amplifier and to the SIF-AGC. For all TV standards with negative video modulation (e.g. B/G standard) the AF output signal (Pin 27) is switched off by the standard switch.
TDA4474
L' Switch and VIF Input Selection
For positive modulated signals (L/L' standard) Pin 16 works as L' switch. With a control voltage 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 connecting VIF2 input (Pin 10 or 11) via 10 k resistor to ground. If negative modulation (B/G mode) is selected pin 16 operates as an input selection switch for the two VIF inputs.
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 polarity 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 selected 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 stereo sound.
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 performance independant of supply voltage and temperature.
Absolute maximum values
Reference point pin 4 (9, 18), unless otherwise specified
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Parameters Supply voltage Pin 25 Supply current Pin 25 Power dissipation, Vs = + 9 V Output currents Pin 14, 26, 27 External voltages Pins 1, 2, 5-8, 10-12, 14, 16, 19, 20, 26-30 Pins 17, 22, 23 Pin 13 Pins 3, 15, 21, 24 Junction temperature Storage temperature Electrostatic handling *) all pins Symbol Vs Is P Iout Vext Value 9.0 85 765 5 + 4.5 Unit V mA mW mA V V V V C C V Tjunc Tstor VESD + 3.5 + 13.5 Vs +125 -25 to +125 300 *) Equivalent to discharging a 200 pF capacitor through a 0 resistor
Operating Range
Supply voltage range Ambient temperature
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Pin 25 Rev. A1: 17.08.1995
Parameters
Symbol Vs Tamb
Value 4.5 to 9.0 0 to +85
Unit V C
Preliminary Information
5 (17)
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Electrical Characteristics Thermal Resistance
Vs = +5V, Tamb = +25C; reference point pin 4 (9, 18), unless otherwise specified
Oscillator drift (free runing) as function of temperature IF input signal for minimum take over point IF input signal for maximum take over point Variation of the take over point by temperature FPLL and VCO: Max. oscillator frequency Vision carrier capture range Supply voltage Supply current: VIF-inputs: Input sensitivity, RMS value Input impedance Input capacitance VIF-AGC: IF gain control range AGC capacitor at Pin 8 Black level capacitor at Pin 17 Tuner-AGC: Available tuner-AGC current Allowable output voltage IF slip - tuner AGC
TDA4474
6 (17)
DC-supply:
Parameters
Parameters Thermal resistance: junction-ambient when soldered to PCB
Pins 20, 22, 23, 28 for carrier generation fvco fvco = 38.9 MHz fcap Cvco = 6.8 pF see note 3 f/T Tamb = 55C, Cvco = 6.8 pF, fvco = 38.9 MHz
Tamb = 55C VIF-AGC: Gv = 46 dB
current Itun: 10% to 90% Rtop = 10 k (Vtop= 2.5 V)
Rtop = 0 (Vtop = 0.8 V)
video output: 2 V
see note 1 see note 1
for FPLL locked
Test Conditions / Pins
Preliminary Information
Vs Is Pins 6-7, 10-11 vin Pins 12, 13 see note 3 Itun 1 Pins 8, 17
Pin 25
Symbol
Gv CAGC CBL
Symbol Rthja
Vout GIF
Rin Cin
vin
vin
vin
Min.
70 1.5
0.3
4.5
40
60
TELEFUNKEN Semiconductors
Value 55
Typ.
65 2.2 100
1.2 2
5.0 75
80
2
2
8
2
Rev. A1: 17.08.1995 Max. -0.3 13.5 10 120 9.0 85 3 4 4 Unit K/W MHz MHz Unit mV mV mA V mA V dB V dB dB F nF k pF %
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Vs = +5V, Tamb = +25C; reference point pin 4 (9, 16), unless otherwise specified
Rev. A1: 17.08.1995 Parameters Video output: Output current - source - sink Output resistance Video output signal Difference of the video signals Sync level Zero carrier level for neg. modolation (Ultra white level) Zero carrier level for pos. modulation (Ultra black level) Supply voltage influence on the ultra black- and ultra white level Video bandwidth (-3dB) Video frequency response over the AGC range Differential gain error Differential phase error Intermodulation 1.07MHz Video signal to noise ratio Residual vision carrier fundamental wave 38.9 MHz and second harmonic 77.8 MHz Lower limiting level Upper limiting level Ripple rejection
Electrical Characteristics
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below sync level above ultra white level Pin 25, 14 see note 1
see note 4 weighted, CCIR-567
RL 1 k, CL 50 pF
V8 = 3 V
V8 = 3 V
see note 1 peak to peak value between B/G and L
Test Conditions / Pins Pin14
Preliminary Information
Symbol Vsync VDC Vlim1 Vlim2 RR Rout vo,vid vo,vid S/N vres1 VDC V/V DG DP Iout
IM
B B
Min.
1.8
35
52 56
6
2
Typ.
1.15
400 600
1.2 3.4
2.0
2 2 60 60 2
8
1
TDA4474
Max.
5 3 100 2.2 10
2.0
10
5 5
MHz dB
%/V
Unit
mV mV dB
% deg dB dB mV
mA mA
V %
7 (17) V V V
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Vs = +5V, Tamb = +25C; reference point pin 4 (9 ,16), unless otherwise specified
Electrical Characteristics
Parameters Test Conditions / Pins Symbol Standard switch: Pin 15 Control voltage for mode 1: see note 5 Vsw1 neg. modulated video-IF signals and FM/NICAM sound Control voltage for mode 2: Vsw2 pos. modulated video-IF signals and AM / L-NICAM sound Switching current Isw AFC output: Pin 24 Control slope I/f Frequency drift by temper- related to the picture carrier ature frequency Output voltage upper VAFC limit lower limit Output current IAFC AFC switch: (pin 21) Control voltage: AFC Vsw "off" see note 6 AFC curve rising AFC curve falling Switching current Isw L' and VIF input selector switch: Pin 16 see note 7 Control voltage: VIF standard switch in mode 1 Vsw1 input 2 active (negative modulation) VIF input 1 active Control voltage: L'- standard switch in mode 2 Vsw2 VCO frequency (positive modulation) L -VCO frequency Switching current Vsw = 0 Isw
TDA4474
8 (17)
Preliminary Information
Vs-0.4 Min. 2.0 0 3.4 0 3.4 0 1.5 3.5 0 Typ. 0.7 0.25 100 100 0.2
TELEFUNKEN Semiconductors
Rev. A1: 17.08.1995 Max. 700 3.0 4.5 3.0 4.5 0.8 2.5 Vs 0.4 0.6 0.8 Vs A/kHz % Unit V mA A V V V V A V V V V A V V
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Vs = +5V, Tamb = +25C; reference point pin 4 (9, 18), unless otherwise specified
Rev. A1: 17.08.1995 Black screen: Channel 1/2 Grid pattern: Channel 1/2 Grey screen 50%: Channel 1/2 Ripple rejection, Parameters SIF inputs: Input sensitivity, RMS value Input impedance Input capacitance SIF - AGC: IF gain control range AGC capacitor Intercarrier output: DC output voltage Output resistance Sound IF output voltage, RMS value Weighted signal to noise ratio: (CCIR 468)
Electrical Characteristics
TELEFUNKEN Semiconductors
Gv CAGC Pin 26 see note 8 VDC see note 1 Rout vin = 10 mV vout 5.5 MHz output voltage Ref .signal: vin =10 mV; FM dev. = 27 kHz fmod = 1 kHz; tested with the double FM demod. U2860B; B/G mod. VIF signal S/N S/N
Pins 25, 26 see note 1
see note 1 see note 1
Test Conditions / Pins Symbol Pins 1-2, 29-30 output signal: -3dB vin
Preliminary Information
Pin 5 S/N RR Rin Cin Min. 35 60 60/57 60/58 54/52 Typ. 2 150 300 1.2 2 65 10 80 Max. 120
TDA4474
Unit
mV
dB dB
dB dB
dB F
k pF
9 (17) V V
TDA4474
Electrical Characteristics
TELEFUNKEN Semiconductors
Vs = +5V, Tamb = +25C; reference point 4 (9 ,16), unless otherwise specified
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2.2 150 500 1 V mV % Signal to noise ratio Ripple rejection SIF input selector switch: Control voltage: SIF input 1 active SIF input 2 active Switching current m = 54 % fmod = 1kHz, 12.5kHz Reference: m = 54%, fmod = 1 kHz, 22 kHz low pass filter Pins 25, 27 see note 1 Pin 3 see note 10 THD S/N 2 65 dB RR 28 dB VSW 2.0 0 Vs V V A 0.8 ISW 100
Parameters AF output - AM: DC output voltage Output resistance AF output voltage, RMS value Total harmonic distortion
Test Conditions / Pins Symbol Pin 27 see note 9 VDC see note 1 Rout m = 54 % voAF
Min.
Typ.
Max.
Unit
Notes:
1. 2.
This parameter is given as an application information and not tested during production.
Adjustment of turn over point (delayed tuner AGC) with external resistor Rtop or external voltage Vtop. The oscillator drift is related to picture carrier frequency, at external temperature-compensated LC circuit a(1.07) = 20 log (4.43 MHz component/1.07 MHz component); a(1.07) value related to black-white signal input signal conditions: picture carrier 0 dB colour carrier -6 dB sound carrier -24 dB Without external control voltage at pin 15 (open circuit) the IC automatically operates in mode : negative modulated video IF and FM/NICAM sound signals
Voltage at Pin 15 (standard switch) Selected standard (mode) 0 - 0.8 V 2.0V - Vs (or Pin 15 open) mode 1 (B/G standard) VIF: neg. modulation SIF: FM/ NICAM
3. 4.
5.
6.
Without control voltage at Pin 21 (open circuit) the falling AFC curve is automatically selected
Voltage at Pin 21 (AFC switch) AFC function 0 - 0.8 V 1.5 - 2.5 V
10 (17)
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mode 2 (L standard) VIF: pos. modulation SIF: AM + NICAM AFC switched OFF AFC curve rising 3.5 V - Vs (or pin 21 open) AFC curve falling
Preliminary Information
Rev. A1: 17.08.1995
TELEFUNKEN Semiconductors
7. Without control voltage at Pin 16 (open circuit) the L' switch is not active. Mode 1: neg. modulation (B/G) 2.0 V - Vs 3.4 V - 4.5 V 0 - 3.1 V (or Pin 16 open)
open 1V open
TDA4474
Mode 2: pos. modulation (L) 0 - 0.8 V 3.4 V - 4.5 V (or Pin 16 open)
open 1V
Standard switch, Pin 15 L'/VIF input switch, Pin 16
Ext. voltage at VIF input 2 Pin 10 or 11 Modulation Standard Active VIF input
0 - 3.1 V
open 1V
*) condition not useful 8. 9. 10.
Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz; PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to sync peak level)
Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54 %; vin = 10 mV Without control voltage at Pin 3 (open circuit) the SIF input 1 is automatically selected
SIF 2 Loop comp.
AF (AM)
Intercarrier (FM/NICAM) +VS
10 kW
30
29
28
27
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
10 mF SIF Input switch AGC (SIF) VIF 1
2.2 mF AGC (VIF) VIF 2
10 kW Standard switch (neg/pos) Tuner AGC Video
SIF 1
Tuner delay
*) External L/C circuit (VCO: 38.9 MHz) with TOKO coil 7KN (9 turns, 0.12mm)
Figure 3.
Test circuit
Rev. A1: 17.08.1995
Preliminary Information
11 (17)
94 9293
A A AA A A AA AAAAAAAAAAAAAAAAAAAAAAA AA A AAAAAAAAAAAAAAAAAAAAAAA AAA A A A A A A A AA A A AA A AA A A AA AA A A AA AAAAAAAAAAAAAAAAAAAAAAA AAAA A A A A A A A AA A A AA AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAA A AA A A AA AA A A AA AAAAAAAAAAAAAAAAAAAAAAA
1V *) *) *) neg. B/G,... VIF1 neg. B/G,... VIF1 neg. B/G,... VIF2 neg. L VIF2 neg. L VIF1 neg. L' VIF2 neg. L' VIF1
AFC AFC switch Loop filter LVCO 6.8 pF CVCO 470 nF 26 25 24 23 22 21 20 2.2 mF 19 18 470 nF 17 16 Black level 150 W CRef L' and VIF input switch
TDA4474
TDA4474
12 (17)
Intercarrier AF(AM) (FM/NICAM) AFC AFC switch +5 V 51 k W Offset comp. 22 mF 10 nF Loop filter SAW: AM 10 k W 10 nF 6.8 pF CRef 470 nF 21 20 19 2.2 mF 18 CVCO 30 28 27 25 29 26 24 23 22 150 W CBL 100 nF 17 16 *) LVCO 51 k W L' / VIF input switch 10 k W
from SAW driver
TDA4474
1 SAW: FM 10 mF SAW: VIF AGC (SIF) 10 nF AGC (VIF) 10 k W SAW: VIF 2.2mF S4 2 5 3 4 6 7 8 9 10 11 12 13 14 15
95 9833
Figure 4. Basic application circuit
Preliminary Information
SIF input switch +12 V Tuner
from SAW driver
Standard switch
TELEFUNKEN Semiconductors
Rev. A1: 17.08.1995
Video
TELEFUNKEN Semiconductors
TDA4474
Internal Pin Configuration
1, 29 6 7 2, 30 2 kW 3V 20 kW 4.2 V 2 kW 2.3 V
2 kW
2 kW
95 9830
95 9831
Figure 5.
Sound IF inputs (Pins 1-2, 29-30)
Figure 8.
Video IF input 1 (Pins 6-7)
3.5 V 60 kW 3 10 kW 8
94 8522
94 8525
Figure 6.
Input selector switch (Pin 3)
Figure 9.
VIF-AGC time constant (Pin 8)
10 5 11 2 kW
94 8523
2V
2 kW 10 kW 10 kW 2.3 V
4.2 V
Figure 7.
SIF-AGC time constant (Pin 5)
95 9834
Figure 10.
Video IF input 2 (Pin 10-11)
Rev. A1: 17.08.1995
Preliminary Information
13 (17)
TDA4474
+ 3.5 V
TELEFUNKEN Semiconductors
3.5 V 17 kW 15.5 kW 15
7 kW 12 900 W 14 kW
95 9819
23 kW
7 kW
95 9832
Figure 14.
Standard switch (Pin 15)
3.5 V
Figure 11.
Tuner AGC - take over point (Pin 12)
5 kW 3.2 V 500 W 16
95 9817
13
95 9820
Figure 15. Figure 12.
L'/VIF input switch (Pin 16)
Tuner AGC - output (Pin 13)
2.7 V
5 kW 14 2.6 mA 17
95 9821 95 9818
Figure 16. Figure 13.
Black level capacitor (Pin 17)
Video output (Pin 14)
14 (17)
Preliminary Information
Rev. A1: 17.08.1995
TELEFUNKEN Semiconductors
TDA4474
19 24 3.5 V
95 9822
Figure 17.
Internal reference voltage (Pin 19)
Figure 21.
95 9826
AFC output (Pin 24)
20
100 W 26 2.75 V
Figure 18.
1 mA
95 9823
Loop filter (Pin 20)
3.5 V
95 9827
Figure 22.
Intercarrier output (Pin 26)
30 kW 21 27 10.5 kW 1.4 mA
95 9824
100 W
Figure 19.
AFC switch (Pin 21)
95 9828
Figure 23.
AF-AM output (Pin 27)
3.5 V 10 kW
7 kW 22 23
7 kW
95 9829
28
95 9825
10 kW
Figure 20.
VCO (Pin 22-23)
Figure 24.
VCO offset compensation (Pin 28)
15 (17)
Rev. A1: 17.08.1995
Preliminary Information
TDA4474
Dimensions in mm
Package: SDIP30
TELEFUNKEN Semiconductors
94 9183
16 (17)
Preliminary Information
Rev. A1: 17.08.1995
TELEFUNKEN Semiconductors
TDA4474
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
Rev. A1: 17.08.1995
Preliminary Information
17 (17)
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