TDA440

      TDA440 is a kind of video IF amplifier.The intergrated circuit has the functions as follows:3 symmetrical IF (broad band) amplifier with first and second regulated stages,controlled stages,controlled color carrier demodulator;video post-amplifier with low pass response and output independent of supply fluctuations;gated AGG section for the IF amplifier;delayed regulated output voltage for the tuner pre-stage.The typical applications include video IF amplifier for color and monochrome television receivers.
      Here you can get some information about the TDA440 features.First is high gain and high stability.The second is constant input impendance independent of AGC.The third one is poor noise increase due to AGC action.Next is negative video signal hardly affected by supply voltage variations.The fifth is minimum RF breakthrough to video outputs.The sixth is fast AGC action-gating largely independent of pulse shape and amplitude.The seventh is very low intermodulation products.The eighth is minimum differential error.The ninth is positive as well as negative video signal available from low impendance outputs.The tenth is intergrated temperature compensating circuit.The last one is DC output component adjustable (peak white).
      What comes next is about the absolute maximum ratings of TDA440.The V_S (supply voltage range (Pin 13)) is from 10 to 15 V.The I_S (supply current of low voltage stabilizer (Pin 14)) is 50 mA.The V_W (white level control (R_W) (Pin 10)) is from -1 to +3 V.The V_EX (external voltage (Pin 4)) is 3.2 V.The P_TOT (power dissipation,TA55) is 700 mW.The T_J (junction temperature) is 125.The T_A (ambient temperature range) is from -25 to +70.The TSTG (storage temperature range) is from -25 to +125.Then is about the thermal resistance.The R_thJA (junction ambient) is 100/W.
      There are the electrical characteristics about TDA440 (V_S=12 V,T_A=25).The minimum V_S (supply voltage) is 10 V,the typical is 12 V and the maximum is 15 V at Pin 13.The minimum I_S (supply current) is 15 mA,the typical is 19 mA and the maximum is 25 mA at Pin 13.The typical V_Q (negative video DC output voltage) is 5.5 V at Pin 11.The typical V_Q (positive video DC output voltage) is 5.6 V at Pin 12.The typical I_Q (output DC current reference point) is 3.2 mA at Pins 11 a nd 13.