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TDA4472-M Datasheet(PDF) 8 Page - TEMIC Semiconductors |
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TDA4472-M Datasheet(HTML) 8 Page - TEMIC Semiconductors |
8 / 14 page TDA4472-M TELEFUNKEN Semiconductors Rev. A2, 15-Oct-96 Preliminary Information 8 (14) Unit Max. Typ. Min. Symbol Test Conditions / Pins Parameters Control voltage: – input 1 active – input 2 active See note 9 VSW 2.0 0 VS 0.8 V V Switching current ISW ±100 mA Notes 1.) This parameter is given as an application information and not tested during production. 2.) In VCR mode the VIF- and SIF path is switched off. 3.) Adjustment of turn over point (delayed tuner AGC) with external resistor Rtop or external voltage Vtop possible. 4.) Resonance circuit of VCO (fo = 38.9 MHz): CVCO = 8.2 – 10 pF, Coil LVCO with unloaded Q-factor Qo w 60 for an oscillator voltage w 100 mVRMS at Pin 20 – 21 (e.g. TOKO coil 7 KM, 292 XNS - 4051Z) 5.) The oscillator drift is related to the picture carrier frequency, at external temperature-compensated LC circuit. 6.) 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 7.) Without control voltage at Pin 19 “AFC on” is automatically selected. 8.) 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). 9.) Without control voltage at Pin 3 the SIF input 1 is automatically selected. 28 27 26 25 24 23 22 21 20 19 18 17 16 15 12 35 4 6 789 10 11 12 13 14 8.2 pF LVCO CVCO Loop filter 150 W 470 nF AFC switch AFC +VS Intercarrier (FM/NICAM) 10 k W Loop comp. SIF 2 CRef 2.2 mF 10 k W Tuner delay Tuner AGC Video AGC (VIF) VIF AGC (SIF) SIF Input switch SIF 1 NC NC 10 mF 2.2 mF NC NC *) external L/C circuit (VCO 38.9 MHz) with TOKO coil 7KM, 292XNS – 4051Z Figure 3. Test circuit |
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