TDA4470 ATMEL Corporation, TDA4470 Datasheet

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TDA4470

Manufacturer Part Number
TDA4470
Description
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer
ATMEL Corporation
Datasheet

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Multistandard Video-IF + 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
Features
D 5 V supply voltage; low power consumption
D Active carrier generation by FPLL principle
D Very linear video demodulation, good pulse response
D VCO circuit operates at picture carrier frequency, the
D Alignment-free AFC without external reference
D VIF-AGC for negative modulated signals (peak sync.
D Tuner AGC with adjustable take over point
D Alignment-free quasi parallel sound (QPS) mixer for
Ordering Information
Rev. A4, 23-Feb-01
(frequency-phase-locked-loop) for true
synchronous demodulation
and excellent intermodulation figures
VCO frequency is switchable for L’-mode
circuit, polarity of the AFC curve is switchable
detection) and for positive modulation (peak white/
black level detector)
FM/NICAM sound IF signals
Extended Type Number
TDA4470-MFLG3
TDA4470-MFSG3
TDA4470-MSD
TDA4470-MFS
Package
SDIP28
SSO28
SSO28
SO28
modulation (e.g., B/G standard), positive modulation
(e.g., L standard) and the AM, FM/NICAM sound IF
signals.
D Intercarrier output signal is gain controlled (necessary
D Complete alignment-free AM demodulator with gain
D Separate SIF-AGC with average detection
D Two independent SIF inputs
D Parallel operation of the AM demodulator and QPS
D Package and relevant pinning is compatible with the
Package: SDIP28, SO28, SSO28
for digital sound processing)
controlled AF output
mixer (for NICAM-L stereo sound)
single standard version TDA4472, which simplifies
the design of an universal IF module
Delivery in taped form
Delivery in tubes
Delivery in taped form
Remarks
TDA4470
1 (17)

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TDA4470 Summary of contents

Page 1

... Multistandard Video-IF + 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 Features supply voltage; low power consumption D Active carrier generation by FPLL principle ...

Page 2

... TDA4470 Block Diagram Offset comp. (optional) 26 Ï FPLL VIF amp 6 Ï VIF 7 Ï C AGC 8 Ï AGC 15 (VIF) Ï Tuner 11 Ï Ï Tuner 10 AGC Ï Take over point 27 Ï SIF 2 28 Ï Ï SIF input switch 3 Ï Ï 1 Ï Ï SIF 1 2 Ï ...

Page 3

... VCO phase for improved sound quality (fine adjustment). Without a potentiometer (open circuit at Pin 26), this offset compensation is not active. Rev. A4, 23-Feb-01 TDA4470 The oscillator signal passes a phase shifter and supplies the in-phase signal (0 ) and the quadrature signal (90 )of the generated picture carrier. ...

Page 4

... TDA4470 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 delivers the same sync. level. In parallel to this, the correct VIF-AGC is selected for positive or negative modulated VIF signals. ...

Page 5

... V AFC VCO 19 20 VCO 27 Ref GND C BL TDA4470 Symbol Function V , SIF1 input (symmetrical) i SIF1 V Input selector switch sw GND Ground C SIF-AGC (time constant) AGC V VIF input (symmetrical) i, VIF C VIF-AGC (time constant) AGC R Take over point, tuner AGC top I Tuner AGC output current ...

Page 6

... TDA4470 Absolute Maximum Ratings Reference point Pin 4 (9, 16), unless otherwise specified Parameters Supply voltage SDIP28 package SO28 and SSO28 package Supply current Power dissipation SDIP28 package SO28 and SSO28 package Output currents External voltages Pins 10, 12, 14, 17, 18 and Pins 15, 20 and 21 ...

Page 7

... Pins 18, 20, 21 and 26 f vco = 38.9 MHz, f vco cap = 8.2 pF vco amb = 8.2 pF, vco = 38.9 MHz vco Pin out vid v o,vid V sync = kW TDA4470 Min. Typ. Max. Unit 4.5 5.0 9.0 V 4.5 5.0 5 120 RMS 1 2.2 100 nF 4 0.3 13 see note 4 70 MHz 1 ...

Page 8

... TDA4470 Parameters Video frequency response over the AGC range Differential gain error Differential phase error Intermodulation See note 6 1.07 MHz Video signal to noise ratio Weighted, CCIR-567 Residual vision carrier fundamental wave 38.9 MHz and second harmonic 77.8 MHz Lower limiting level ...

Page 9

... S kHz, mod RR Pin 38.9 MHz 8.2 – 10 pF, o VCO w 60 for an oscillator voltage w 100 33.4 MHz kHz 54%; v mod TDA4470 Min. Typ. Max. 150 180 250 350 60/58 54/52 60/57 35 see note 11 2.2 150 400 500 630 ...

Page 10

... TDA4470 AF (FM/NICAM) SIF 2 (AM) Loop comp AGC (SIF) SIF Input switch SIF external L/C circuit (VCO 38.9 MHz) with TOKO coil 7KM, 292 XNS – 4051Z 10 (17) Intercarrier AFC + 8 2.2 mF AGC (VIF) VIF Figure 3. Test circuit AFC switch Loop filter 22 mF ...

Page 11

... External L/C circuit (VCO: 38.9 MHz) with TOKO coil 7KM, 292 XNS – 4051Z Rev. A4, 23-Feb-01 Figure 4. Basic application circuit TDA4470 11 (17) ...

Page 12

... TDA4470 Internal Pin Configuration Figure 5. Sound IF inputs (Pin 1-2, 27-28) 3 8522 Figure 6. Input selector switch (Pin 3) 5 Figure 7. SIF-AGC time constant (Pin 5) 12 (17 4 8521 Figure 8. Video IF input (Pin 6-7) 8 Figure 9. VIF-AGC time constant (Pin 8) 94 8523 Figure 10. Tuner AGC – take over point (Pin 10) ...

Page 13

... Figure 11. Tuner AGC – output (Pin 11) 2 8528 Figure 12. Video output (Pin 12 8529 Figure 13. Standard switch (Pin 13) Rev. A4, 23-Feb-01 TDA4470 2 8530 Figure 14. Black level capacitor (Pin 15) 3.5 V Figure 15. Internal reference voltage (Pin 17) 2.75 V Figure 16. Loop filter (Pin 18) 94 8531 94 8532 ...

Page 14

... TDA4470 3 10 8533 Figure 17. AFC switch (Pin 19 8534 Figure 18. VCO (Pin 20-21) 94 8535 Figure 19. AFC output (Pin 22) 14 (17) 100 8536 Figure 20. Intercarrier output (Pin 24 100 W 25 1.4 mA Figure 21. AF output AM sound (Pin 25) 94 8538 Figure 22. VCO offset compensation (Pin 26 8537 3.5 V ...

Page 15

... Rev. A4, 23-Feb-01 4.8 4.2 0.9 3.3 0.53 0.43 1.778 technical drawings according to DIN specifications 2.35 0.25 0.10 15 technical drawings according to DIN specifications 14 TDA4470 10.26 10.06 8.7 8.5 0.35 0.25 12.2 11.0 13044 9.15 8.65 7.5 7.3 0.25 10.50 10.20 13033 15 (17) ...

Page 16

... TDA4470 Package Information Package SSO28 Dimensions in mm 9.10 9.01 0.25 0.65 8. (17) 5.7 5.3 4.5 4.3 1.30 0.15 0.05 6.6 6.3 15 technical drawings according to DIN specifications 14 0.15 13018 Rev. A4, 23-Feb-01 ...

Page 17

... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A4, 23-Feb-01 TDA4470 http://www.atmel–wm.com 17 (17) ...

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