AN7273

ICs for FM/AM Tuner AN7273, AN7273S 0.5±0.1 3.8±0.25 0.3 – 0.0 + 0.1 5 2 AM Tuner, FM/AM IF Amplifier Circuit s Overview The AN7273 and the AN7273S are the ICs designed for Hi-Fi stereo tuner. They are functioned with stop signal pin besides the AN7223S function. AN7273 1 2 3 21.7±0.3 4 5 6 7 8 9 6.3±0.25 18 17 16 15 14 13 12 11 10 Unit : mm 1.2±0.25 s Features Level meter output (FM–AM common use) Stop signal output (for synthesizer tuner) AM : including RF amplifier and high sensitivity Low power consumption Low shock noise level from function switch operation Fewer external parts 0.51min. (3.45) 3 ~ 15˚ 7.62±0.25 18-Lead DIP Package (DIP018-P-0300E) AN7273S 1.3 1 18 0.4±0.25 1.27 9 0.1 10 1.2±0.3 0.15 5.4±0.3 7.7±0.3 14 VCC 17 VREF 16 13 15 10 11 GND 0.65 0.3 18-Lead SOP Package (SOP018-P-0300) s Block Diagram 8 9 12 1 7 AM–FM IF Amp. FM IF Amp. FM Quad. Det. Mute Det. Level Meter Mute or Shock Noise Canceller AF Amp. 4 3 AM RF Amp. AM Mixer AM L. Osc. AGC AM Det. 5 18 6 2 VCC (AM) 12.6±0.3 2.54 Unit : mm AN7273, AN7273S s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 Pin Name FM IF Input AM Supply/Mute Adjustment AM RF Input AM Mixer Output AGC Output (2) AGC Output (1) AM IF Input IF By-pass IF By-pass Pin No. 10 11 12 13 14 15 16 17 18 GND FM Detection Coil AF Output VCC Level Meter Output AFC Output Reference Voltage Local Oscillation Coil Pin Name AM Detection Output ICs for FM/AMTuner s Absolute Maximum Ratings (Ta=25˚C)...