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TDA4445A Datasheet(PDF) 2 Page - TEMIC Semiconductors |
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TDA4445A Datasheet(HTML) 2 Page - TEMIC Semiconductors |
2 / 8 page TELEFUNKEN Semiconductors TDA4445A/TDA4445B Rev. A1: 14.09.1995 2 (8) Pin Description Pin Symbol Function 1–16 IF input 3 If AGC time constant 8–9 Tuned circuit 11 Supply voltage 12 Sound-IF-output 13 Ground 2, 4, 7, 10, 14, 15 not connected TDA4445B additional Pin Symbol Function 5 Average capacitor 6 AF output Circuit Description This circuit includes the following functions D Three symmetrical and gain controlled wide band amplifier stages, which are extremely stable by quasi DC coupling without feedback D Averaged AGC with discharge control circuit D AGC voltage generator Quasi parallel sound operation D High phase accuracy of the carrier signal processing, independent from AM D Linear quadrature demodulator D Sound–IF–amplifier stage with impedance converter AM–Demodulation (TDA4445B only) D Carrier controlled demodulator D Audio frequency stage with impedance converter D Averaged low pass AGC Absolute Maximum Ratings Reference point pin 3, unless otherwise specified Parameters Symbol Value Unit Supply voltage range Pin 11 VS 10 ... 15 V Supply current Pin 11 IS 70 mA External voltages TDA4445A, B Pin 3 Pin 12 TDA4445B only Pin 5, 6 Vext 12 8 8 V Power dissipation in soldered position Ptot 1 W Junction temperature Tj 125 °C Ambient temperature range Tamb –25 to +70 °C Storage temperature range Tstg –25 to +125 °C Thermal Resistance Parameters Symbol Value Unit Junction ambient RthJA 60 K/W |
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