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TDA4474
Multistandard Video-IF + 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 VIF plus 2 SIF) and the common pinning with TDA4471 gives flexibility to design a universal IF module for various applications.
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 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 Four IF inputs (2 VIFin and 2 SIFin) D Package and relevant pinning is compatible with the TDA4471; simplifies the design of an universal IF module
Package: SDIP30
Ordering Information
Extended Type Number TDA4474-MSD Package SDIP30 Remarks
Rev. A3, 23-Feb-01
1 (16)
TDA4474
Offset comp. (optional) Loop filter
VCO
FPLL
0 90
VIF 2
AFC VIF amp
11
6
VIF 1 CAGC
7
8
Video det. AGC (VIF) Standard
17
CBL Tuner
13
12
Supply
Take over point SIF 2
FM det.
29
30
SIF amp
SIF input switch 3
1
SIF 1
5
AM det.
CAGC
94 7901
Figure 1. Block diagram
2 (16)
I I I
2
AGC (SIF)
I I I I II
Tuner AGC
I I I I II
II II
II II II II II II II II II II II II II II II II II II II II II II II
10
II I II I
I I
II II
28
20
22
23
VCO + phase shift
II II
Block Diagram
L' switch and VIF input switch
16
Control 21 24
AFC switch AFC
14
Video
15
Standard switch VS
25
19
CRef
26
Intercarrier (FM / NICAM)
II
27
AF (AM)
4,9,18
Rev. A3, 23-Feb-01
TDA4474
Pin Description
Vi,SIF1 1 Vi,SIF1 2 VSW GND CAGC Vi,VIF1 Vi,VIF1 CAGC GND 3 4 5 6 7 8 9 30 Vi,SIF2 29 Vi,SIF2 28 Rcomp 27 Vo,AM 26 Vo,FM 25 VS 24 VAFC 23 VVCO 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)
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. Pinning
VSW LF CRef GND CBL VSW(L')
Rev. A3, 23-Feb-01
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3 (16)
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. A practicable VCO alignment of the external coil is the adjustment to zero AFC output current at Pin 24. At center frequency the AFC output current is equal to zero. Furthermore, at Pin 16, the VCO center frequency can be 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.
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).
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 (-3 dB). 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 6 dB gain offers easy adaption of the sound trap. For nominal video IF modulation the video output signal at Pin 14 is 2 V (peakto-peak value).
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".
4 (16)
Rev. A3, 23-Feb-01
TDA4474
AM Demodulator
The alignment-free AM demodulator is realized by a synchronous detector. The modulated SIF signal from the 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.
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 center 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 kW 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 Ratings
Reference point Pin 4 (9, 18), unless otherwise specified 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 Value 9.0 93 840 5 Unit V mA mW mA V V V V C C V
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Vext Tj Tstg VESD + 4.5 + 3.5 + 13.5 Vs +125 -25 to +125 "300 *) Equivalent to discharging a 200 pF capacitor through a 0 W resistor Rev. A3, 23-Feb-01 5 (16)
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Thermal Resistance Operating Range
Parameters Junction ambient when soldered to PCB Supply voltage range Ambient temperature Pin 25 Symbol RthJA Symbol Vs Tamb Value 4.5 to 9.0 -10 to +85 Value 55 Unit K/W Unit V C Vs = +5 V, Tamb = +25C; reference point Pin 4 (9, 18), measurements taken in test circuit according to figure 3 unless otherwise specified
Electrical Characteristics
TDA4474
6 (16) Oscillator drift (free runing) as function of temperature AGC capacitor Black level capacitor Tuner-AGC Available tuner-AGC current Allowable output voltage IF slip - tuner AGC 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 Parameters DC-supply Supply voltage Supply current: VIF-inputs Input sensitivity, RMS value Input impedance Input capacitance VIF-AGC IF gain control range Parameters Current Itun: 10 to 90% Rtop = 10 kW (Vtop= 2.5 V) Rtop = 0 vin 40 (Vtop = 0.8 V) DTamb = 55C Dvin VIF-AGC: Gv = 46 dB Pins 20, 22, 23, 28 see note 3 For carrier generation fvco 70 fvco = 38.9 MHz Dfcap "1.5 Cvco = 8.2 pF See note 4 Df/DT DTamb = 55C, Cvco = 8.2 pF, fvco = 38.9 MHz Vs Is Pins 6-7, 10-11 For FPLL locked vin See note 1 Rin See note 1 Cin Pins 8, 17 Video output: 2 Vpp Gv Test Conditions / Pins Pin 25 Pin 8 CAGC Pin 17 CBL Pins 12, 13 see note 2 Itun Symbol Vout DGIF vin Min. 0.3 4.5 60 1 Typ. "2 2.2 100 80 1.2 2 5.0 85 65 2 8 2
Rev. A3, 23-Feb-01 Max. -0.3 13.5 10 4 120 9.0 93 3 4 VRMS kW pF MHz MHz Unit mV V dB mV mA V mA dB dB F nF %
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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 (-3 dB) Video frequency response over the AGC range Differential gain error Differential phase error Intermodulation 1.07 MHz 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 Standard switch Control voltage for mode 1: neg. modulated VIF and FM/NICAM sound Control voltage for mode 2: pos. modulated VIF and AM / L-NICAM sound Switching current AFC output Control slope Frequency drift by temperature Output voltage: upper limit lower limit Output current Parameters Video output Output current - source - sink Output resistance Video output signal Related to the picture carrier frequency Below sync level Above ultra white level Pin 25, 14, see note 1 Pin 15 See note 6 See note 5 Weighted, CCIR-567 RL w 1 kW, CL v 50 pF V8 = 3 V V8 = 3 V Between B/G and L See note 1 Peak-to-peak value Test Conditions / Pins Pin14 Pin 24 Symbol DVlim1 DVlim2 RR Dvo,vid "Iout DV/V Vsync VDC VAFC DI/Df DfIF Rout vo,vid Vsw2 Vsw1 IAFC DG DP aIM S/N vres1 VDC B DB Isw Vs-0.4 Min. 2.0 1.8 35 52 56 0 6 2 "100 "0.2 Typ. 0.7 0.25 1.15 400 600 1.2 3.4 2.0 2 2 60 60 2 8 1
Rev. A3, 23-Feb-01 Max. 5 3 100 2.2 0.4 0.6 0.8 2.0 Vs 10 10 5 5
TDA4474
mA/kHz %
%/ V
MHz dB
Unit
mA mA W Vpp
V V mA
mV mV dB
% deg dB dB mV
mA
7 (16) % V V V V V
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TDA4474
Parameters Test Conditions / Pins Symbol AFC switch Pin 21 see note 7 Control voltage: AFC "off" Vsw AFC curve rising AFC curve falling Switching current Isw L' and VIF input selector switch Pin 16 see note 8 Control voltage: Standard switch in mode 1 VIF input 2 active (negative modulation) Vsw1 VIF input 1 active Control voltage: Standard switch in mode 2 L'-VCO frequency (positive modulation) Vsw2 L-VCO frequency Switching current Vsw = 0 Isw SIF inputs Pins 1-2, 29-30 Input sensitivity, RMS valueAAAAAAAAA vin Output signal: -3 dB Input impedance See note 1 Rin Input capacitance See note 1 Cin SIF - AGC Pin 5 IF gain control range Gv AGC capacitor CAGC Intercarrier output Pin 26 see note 9 DC output voltage VDC Output resistance See note 1 Rout Intercarrier output voltage, vin = 10 mV vout RMS value 5.5 MHz output voltage Weighted signal to noise Reference signal: ratio: (CCIR 468) vin =10 mV; FM dev. = "27 kHz fmod = 1 kHz; tested with the double FM demod. U2860B; B/G mod. VIF signal Black screen: Channel 1/2 S/N Grid pattern: Channel 1/2 S/N Grey screen 50%: S/N Channel 1/2 Ripple rejection, Pins 25, 26, see note 1 RR AF output - AM Pin 27 see note 10 DC output voltage VDC Output resistance See note 1 Rout AF output voltage, RMS m = 54 % voAF value Total harmonic distortion m = 54 % THD fmod = 1kHz, 12.5kHz Signal to noise ratio Reference: m = 54%, S/N fmod = 1 kHz, 22 kHz low pass filter Ripple rejection Pins 25, 27, see note 1 RR Min. 400 180 0 3.4 0 3.4 0 1.5 3.5 28 35 60 "100 60/57 60/58 54/52 Typ. 2.2 150 500 2 150 250 80 1.2 2 65 65 10 1 Max. 630 350 120 3.0 4.5 700 3.0 4.5 0.8 2.5 Vs 2 V W mVRMS V W mVRMS mVRMS kW pF Unit V V mA V V V mA dB dB dB dB dB dB dB mF % V V
8 (16)
Rev. A3, 23-Feb-01
TDA4474
A A AA A A A A AAAAAAAAAAAAAAA AAAAAAAA AAAAAAAA A AA A A A AAAAAAAAAAAAAAA AAAAAAAA AAAAAAAA A AAAAAAAAAAAAAAA AAAAAAAA AAAAAAAA AAA A A A A A AA A A A AAAAAAAAAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAAAAAAAA AAAAAAAA AAAAAAAA AAAA AA AAA AAA AAAAAAAA AA A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
VSW ISW 2.0 0 Vs 0.8 "100 V V mA Notes:
1.) 2.) 3.) 4.) 5.) 6.)
Parameters SIF input selector switch Control voltage: SIF input 1 active SIF input 2 active Switching current
Test Conditions / Pins Pin 3 See note 11
Symbol
Min.
Typ.
Max.
Unit
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. Resonance circuit of the VCO, f = 38.9 MHz: Capacitor CVCO [ 8.2 - 10 pF, coil LVCO with unloaded Q-factor Q0 w 60 for an oscillator voltage w 100 mVRMS (Pin 22-23); e.g., TOKO coil 7KM, 292 XNS - 4051Z 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 1: negative modulated video IF and FM/NICAM sound signals Mode 2 0 - 0.8 V Mode 1 2 V - Vs (or Pin 15 open) (B/G standard) VIF: neg. modulation SIF: FM/ NICAM
Voltage at Pin 15 (Standard Switch) Selected Standard (Mode)
7.)
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
8.)
Without control voltage at Pin 16 (open circuit) the L' switch is not active. 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 *) condition not useful 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 1V neg. B/G,... VIF1 neg. B/G,... VIF1 neg. B/G,... VIF2 *) *) *)
9.) 10.) 11.)
Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.1578 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
Rev. A3, 23-Feb-01
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AAAAAAA A A A AAAAAAAA AAAAAA AAAAAAA AA AAAAAA AAAAAAA A AAAAAAAA AAAAAA AAAAAAA AA A A AAAAAAAA AAAAAA AAAAAAA AA A AAAAAAAAAAA A AAAAAAAAAAA AAAAAAAAAA A AAAAAAAAAAA AAAAAAAAAA A AAAAAAAAAAA AAAAAAAAAA A AAAAAAAAAAA AAAAAAAAAA A AAAAAAAAAAA AAAAAAAAAA AAAAAAAAAAA
(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 Mode 2: pos. modulation (L) 0 - 0.8 V 3.4 V - 4.5 V 0 - 3.1 V (or Pin 16 open) open 1V open 1V pos. L VIF2 pos. L VIF1 pos. L' VIF2 pos. L' VIF1 9 (16)
TDA4474
SIF 2 Loop comp. AF (AM) Intercarrier (FM/NICAM) +VS AFC AFC switch Loop filter LVCO 8.2 pF 10 kW CVCO 470 nF 30 29 28 27 26 25 24 23 22 21 20 2.2 mF 19 18 470 nF 17 16 Black level 150 W CRef 22 K L' and VIF input switch
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
10 mF SIF Input switch SIF 1 VIF 1 AGC (SIF)
2.2 mF AGC (VIF) VIF 2
10 kW Standard switch (neg/pos) Tuner AGC Video
Tuner delay
*) External L/C circuit (VCO: 38.9 MHz) e.g., with TOKO coil 7KM, 292XNS-4051Z, 8 turns, O 0.12 mm
Figure 3.
Test circuit
10 (16)
Rev. A3, 23-Feb-01
94 9293
Intercarrier AF(AM) (FM/NICAM) AFC AFC switch +5 V 51 k W Offset comp. 22 mF 10 nF Loop filter 51 k W
Rev. A3, 23-Feb-01
L' / VIF input switch 10 k W 10 nF 8.2 pF CVCO 470 nF 21 20 19 30 28 27 25 29 26 24 23 22 CRef 2.2 mF 18 *) LVCO 150 W CBL 100 nF 17 16 22 k W
95 9833
SAW: AM
from SAW driver
1
2 5
3
4
6
7
8
9
10
11
12
13
14
15
SAW: FM 10 mF 10 nF AGC (SIF) 2.2mF 10 nF AGC (VIF) 10 k W Standard switch 270 S4
Figure 4. Basic application circuit
*) VCO circuit: f = 38.9 MHz e.g., TOKO coil 7KM, 292 XNS-4051Z, 8 turns, O 0.12 mm SIF input switch +12 V
SAW: VIF
from SAW driver
SAW: VIF
TDA4474
Tuner
Video
11 (16)
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 8. Video IF input 1 (Pins 6-7) Figure 5. Sound IF inputs (Pins 1-2, 29-30)
94 8525
3.5 V 60 kW 3 10 kW 8
94 8522
Figure 6. Input selector switch (Pin 3) Figure 9. VIF-AGC time constant (Pin 8)
10 11 5 2 kW 4.2 V
94 8523
2V
2 kW 10 kW 10 kW 2.3 V
95 9834
Figure 7. SIF-AGC time constant (Pin 5)
Figure 10. Video IF input 2 (Pin 10-11)
12 (16)
Rev. A3, 23-Feb-01
TDA4474
+ 3.5 V 3.5 V 17 kW 15.5 kW 15 14 kW
95 9819
7 kW 12 900 W
23 kW
7 kW
95 9832
Figure 14. Standard switch (Pin 15)
Figure 11. Tuner AGC - take over point (Pin 12)
3.5 V 5 kW
95 9817
3.2 V 500 W
16
13
95 9820
Figure 15. L'/VIF input switch (Pin 16) Figure 12. Tuner AGC - output (Pin 13)
2.7 V
14 2.6 mA 17
5 kW
95 9818
95 9821
Figure 13. Video output (Pin 14)
Figure 16. Black level capacitor (Pin 17)
Rev. A3, 23-Feb-01
13 (16)
TDA4474
19 24 3.5 V
95 9822
Figure 17. Internal reference voltage (Pin 19)
95 9826
Figure 21. AFC output (Pin 24)
20
100 W 26 2.75 V
Figure 18. Loop filter (Pin 20)
1 mA
95 9823
95 9827
3.5 V
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)
7 kW 22 23
7 kW
95 9829
3.5 V 10 kW
28
10 kW
95 9825
Figure 20. VCO (Pin 22-23)
Figure 24. VCO offset compensation (Pin 28)
14 (16)
Rev. A3, 23-Feb-01
TDA4474
Package Information
Package SDIP30
Dimensions in mm
27.5 27.1 27.3 27.1 0.9 10.26 10.06 8.7 8.5
4.8 4.2 3.3 0.35 0.25
1.778
0.53 0.43 24.892
1.1 0.9 12.2 11.0 16
30
technical drawings according to DIN specifications 13046
1
15
Rev. A3, 23-Feb-01
15 (16)
TDA4474
Ozone Depleting Substances Policy Statement
It is the policy of Atmel Germany 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. Atmel Germany GmbH 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. Atmel Germany GmbH 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 Atmel Wireless & Microcontrollers products for any unintended or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers 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. Data sheets can also be retrieved from the Internet: http://www.atmel-wm.com
Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423
16 (16)
Rev. A3, 23-Feb-01

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