tda4474-msd ATMEL Corporation, tda4474-msd Datasheet
tda4474-msd
Related parts for tda4474-msd
tda4474-msd Summary of contents
Page 1
... D Tuner AGC with adjustable take over point Ordering Information Extended Type Number TDA4474-MSD Rev. A2, 04-Dec-98 Four IF inputs (2 VIF plus 2 pinning with TDA4471 gives flexibility to design a universal IF module for various applications. ...
Page 2
... TDA4474 Block Diagram Offset comp. (optional) 28 Ï Ï FPLL 10 Ï Ï Ï Ï VIF 2 11 Ï Ï 6 Ï Ï VIF 1 7 Ï Ï C AGC 8 Ï Ï 17 Ï Ï Tuner Ï Ï Tuner 12 AGC Ï Ï Take over 29 point Ï Ï Ï Ï ...
Page 3
... V 18 GND i,SIF2 (L’) SW TDA4474 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’ ...
Page 4
... 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 ...
Page 5
... Electrostatic handling *) all pins *) Equivalent to discharging a 200 pF capacitor through a 0 Rev. A2, 04-Dec-98 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’ ...
Page 6
... TDA4474 Operating Range Parameters Supply voltage range Pin 25 Ambient temperature Thermal Resistance Parameters Junction ambient when soldered to PCB Electrical Characteristics +25 C; reference point Pin 4 (9, 18), measurements taken in test circuit according to figure 3 unless s amb otherwise specified Parameters Test Conditions / Pins ...
Page 7
... res1 D V lim1 D V lim2 RR 35 Pin 15 V 2.0 sw1 V 0 sw2 I sw Pin –0.4 AFC s I AFC TDA4474 Typ. Max. Unit 100 2.0 2 1.2 V 3 MHz 2 deg ...
Page 8
... TDA4474 Parameters Test Conditions / Pins AFC switch Control voltage: AFC “off” AFC curve rising AFC curve falling Switching current L’ and VIF input selector switch Control voltage: Standard switch in mode 1 VIF input 2 active (negative modulation) VIF input 1 active Control voltage: Standard switch in mode 2 L’ ...
Page 9
... Pin 16 open) open 1 V open 1 V neg. neg. neg. *) B/G,... B/G,... B/G,... *) VIF1 VIF1 VIF2 *) = 33.4 MHz 33.1578 MHz kHz mod TDA4474 Typ. Max. Unit 0.8 V " m 100 A or external voltage V . top top w 60 Mode – Vs (or Pin 15 open) (B/G standard) VIF: neg ...
Page 10
... TDA4474 Intercarrier AF (FM/NICAM) SIF 2 (AM) Loop comp SIF AGC (SIF) Input switch SIF 1 *) External L/C circuit (VCO: 38.9 MHz) e.g., with TOKO coil 7KM, 292XNS-4051Z, 8 turns (16) AFC AFC switch +V S Loop filter L VCO W 150 8 ...
Page 11
AF(AM) Offset comp. SAW from SAW driver SAW SAW: VIF from SAW driver SAW: VIF SIF input switch Intercarrier (FM/NICAM) AFC AFC switch +5 V ...
Page 12
... TDA4474 Internal Pin Configuration 9830 Sound IF inputs (Pins 1–2, 29–30) Figure 5. 3 8522 Input selector switch (Pin 3) Figure 6. 5 SIF–AGC time constant (Pin 5) Figure 7. 12 (16 4.2 V Video IF input 1 (Pins 6– ...
Page 13
... 9832 Tuner AGC – take over point (Pin 12) Figure 11. 95 9817 13 Tuner AGC – output (Pin 13) Figure 12 9818 Video output (Pin 14) Figure 13. Rev. A2, 04-Dec-98 TDA4474 3 15 9819 Standard switch (Pin 15) Figure 14. 3 ...
Page 14
... TDA4474 19 3.5 V Internal reference voltage (Pin 19) Figure 17. 20 2.75 V Loop filter (Pin 20) Figure 18 9824 AFC switch (Pin 21) Figure 19 9825 VCO (Pin 22–23) Figure 20. 14 (16 9822 Figure 21. 100 26 95 9823 95 9827 Intercarrier output (Pin 26) Figure 22 ...
Page 15
... Dimensions in mm Package SDIP30 Dimensions in mm 1.778 30 1 Rev. A2, 04-Dec-98 27.5 27.1 27.3 27.1 0.9 4.8 4.2 0.35 3.3 0.25 0.53 1.1 0.43 0.9 24.892 16 technical drawings according to DIN specifications 15 TDA4474 10.26 10.06 8.7 8.5 12.2 11.0 13046 15 (16) ...
Page 16
... TDA4474 Ozone Depleting Substances Policy Statement It is the policy of TEMIC Semiconductor 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 ...