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| ICs for FM/AM Tuner AN7273, AN7273S 0.50.1 3.80.25 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 21.70.3 4 5 6 7 8 9 6.30.25 18 17 16 15 14 13 12 11 10 Unit : mm 1.20.25 Unit : mm 12.60.3 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 7.620.25 18-Lead DIP Package (DIP018-P-0300E) AN7273S 1.3 1 18 1.27 0.40.25 9 0.1 10 1.20.3 0.15 5.40.3 7.70.3 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) 2.54 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=25C) Parameter Supply Voltage Supply Current Power Dissipation Operating Ambient Temperature Storage Temperature *1 Ta = 25C, *2 Ta = 75C AN7273 AN7273S AN7273 AN7273S AN7273 AN7273S Symbol VCC ICC PD Topr Tcsg Rating 14.4 30 317 *1 210 *2 -20 ~ + 75 -20 ~ + 75 -55 ~ + 150 -55 ~ + 125 Unit V mA mW C C s Recommended Operating Range (Ta = 25C) Parameter Operating Supply Voltage Range Symbol VCC (opr) Range 3 ~ 12V s Electrical Characteristics (VCC= 5V, Ta= 25C) Parameter Total Circuit Current Demodulation Output Level FM Limiting Sensitivity Muting Sensitivity Level Meter Driving Output (1) Level Meter Driving Output (2) Total Circuit Current Detection Output Level AM Max. Sensitivity Level Meter Driving Output (1) Level Meter Driving Output (2) Symbol Itot VO Vi (lim) Vi (Mute) V15-11 V15-11 Itot VO Smax. V15-11 V15-11 Condition DC measurement Vi =80dB Input at VO = -3dB Input at VO =more than -20dB Vi =70dB Vi =100dB DC measurement Vi =80dB Input at VO =10mV Vi = -10dB Vi =80dB min. 9 75 43.5 55 0.61 1.14 8 60 4 0 1.12 1.25 typ. 14 100 46 64 0.8 1.26 13 80 9.5 max. 20 125 49.5 73 1.1 1.42 19 100 15 130 1.38 Unit mA mV dB dB V V mA mA dB mV V Note) Unless otherwise specified, fi =10.7MHz, Mod. = 22.5kHz, fm = 400Hz (FM) fi =1MHz, Mod. = 30%, fm = 400Hz (AM) ICs for FM/AMTuner AN7273, AN7273S VO, Vno, THD -Vi (FM) Output Voltage VO (dB), Output Noise Voltage Vno (dB) Output Voltage VO (dB), Signal to Noise Ratio S/N (dB) 0 -10 VO -20 -30 -40 -50 -60 -70 THD -80 0 20 40 60 80 100 0 120 Vno 10 VO, S/N, THD -Vi (AM) 1.6 VO 0 S/N -10 -20 -30 -40 -50 -60 -70 THD Mod. = 80% Level meter Voltage V15 (V) 0dB = 81mV VCC = 5V fm = 400Hz fi = 1MHz 12 Total Harmonic Distortion THD (%) 10 8 6 4 2 Mod. = 30% 0 20 40 60 80 100 0 120 1.4 1.2 1.0 V15 -Vi VCC = 5V (AM) fi = 1MHz fm = 400Hz, 30% (FM) fi = 10.7MHz fm = 400Hz, 22.5kHz AM FM 0.8 0.6 0.4 0.2 0 4 3 2 1 Total Harmonic Distortion THD (%) VCC = 5V fi = 10.7MHz fm = 22.5kHz, 400Hz 0dB = 108mV 5 0 20 40 60 80 100 120 Input Voltage Vi (dB) Input Voltage Vi (dB) Input Voltage Vi (dB) Vi (lim), VO, Itot -VCC (FM) 140 Input Limiting Voltage Vi (lim) (dB) 50 14 140 Output Voltage VO (mV) 120 100 Input Voltage Vi (dB) 80 60 40 28 24 20 VO, Vi, Itot -VCC (AM) 12 10 Total Circuit Current Itot (mA) fm = 400Hz, 30% fi = 1MHz Itot (M 48 ute O N) ute O FF) Output Voltage VO (mV) 120 Itot (M 8 46 Vi (lim) 4 44 2 VCC = 5V fi = 10.7MHz 0 fm = 400Hz, 22.5kHz 0 2 4 6 8 10 12 14 16 6 VO (Vi = 80 dB) 14 13 12 100 Itot 16 12 0 2 4 11 80 Vi (at V = O 10mV ) 6 8 10 60 10 12 14 16 Supply VoltageVCC (V) Supply Voltage VCC (V) VO -Vi 0 Mute OFF 10 VO -Df Mute OFF 0 Mute ON -20 Output Voltage VO (dB) Output Voltage VO (dB) -10 -20 Mute ON -30 -40 -50 -60 -80 -70 -300 -200 -100 -40 -60 0 20 40 60 80 100 120 0 100 200 300 Input Voltage Vi (dB) Input Frequency Change Df (kHz) Total Circuit Current Itot (mA) VO AN7273, AN7273S s Application Circuit FM AM V15 10F ICs for FM/AMTuner 47 100F 100F 0.022 F VCC=5V + - 0.022F 470 + - 5.1k 0.022F 2.2k + - + - D1 : MA27W T2 51 18 17 D1 16 15 14 13 12 11 10 AN7273/S 1 2 3 4 + - 2k From FM Front End. 330 10k Mute ON OFF T3 CF1 5 100F 6 + - 7 4.7F 8 9 0.022F s Printed Circuit Board Layout FM IF Input C1 AM ANT 330 CF1 T3 100F 4.7F 47pF 1 SW FM AM 2.2k Mute Adj. IN T2 AM 18 10F 0.022F 0.022F 0.022F 0.01 F 2.2F 47F + - 0.0047F T1 VO (FM, AM) 27k 0.022F 0.022F AN7273 ANT OSC CF2 5.1k 22F 0.022F 2.2k T1 VCC 1F +- 27k 0.01F AF Output 0.022F 0.0047F 10k 100F 47F 47 470 0.022F 100F Mute SW MA27W (Matsushita) VCC ICs for FM/AMTuner s Coil Specifications Symbol Use, Freq. FM Quad. Coil 10.7MHz Type No. Maker AN7273, AN7273S Connection Diagram Number of Turns Tuning Cap. 1 4 1 - 2 8T 2 - 3 5T 4 - 6 3T Unloaded Q T1 ELF- 7S752A Matsushita 2 3 3 6 4 100pF 9020% T2 AM MW Osc. Coil ELL- 7S754 Matsushita 2 1 3 6 4 1 - 2 4T 2 - 3 125T 4 - 6 7T -- 9520% T3 AM Mix. Output 455kHz EIA- 7S802A Matsushita 2 1 6 3 - 2 35T 6 - 4 10T 2 - 1 19T 1500pF 6030% s Ceramic Filter Specification Symbol CF1 Use AM IF Type No. CFM2- 455B Maker Toko Center Freq. 455kHz Band Width 7kHz (-6dB) Loss 2.6dB |
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