ICs for FM/AM Tuner AN7273, AN7273S 2 3 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. 4 15 5 14 6 13 7 12 8 11 9 10 21.7±0.3 ■ Overview 18 17 16 ■ 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 Unit : mm 2.54 1 0.5±0.1 AN7273 1.2±0.25 AM Tuner, FM/AM IF Amplifier Circuit 0.51min. 6.3±0.25 3.8±0.25 (3.45) + 0.1 5 2 0.3 – 0.0 3 ~ 15˚ 7.62±0.25 18-Lead DIP Package (DIP018-P-0300E) AN7273S 1 18 9 10 0.15 0.3 5.4±0.3 0.65 0.1 1.2±0.3 1.27 12.6±0.3 0.4±0.25 1.3 Unit : mm 7.7±0.3 18-Lead SOP Package (SOP018-P-0300) ■ Block Diagram 8 12 9 14 VCC 1 7 AM–FM IF Amp. FM IF Amp. FM Quad. Det. 17 VREF Mute Det. 16 Mute or Shock Noise Canceller Level Meter AF Amp. 13 15 4 3 AM RF Amp. AM Mixer 5 AM L. Osc. AGC 18 6 AM Det. 2 VCC (AM) 10 11 GND ICs for FM/AMTuner AN7273, AN7273S ■ Pin Descriptions Pin No. Pin Name Pin No. Pin Name 1 FM IF Input 10 AM Detection Output 2 AM Supply/Mute Adjustment 11 GND 3 AM RF Input 12 FM Detection Coil 4 AM Mixer Output 13 AF Output 5 AGC Output (2) 14 VCC 6 AGC Output (1) 15 Level Meter Output 7 AM IF Input 16 AFC Output 8 IF By-pass 17 Reference Voltage 9 IF By-pass 18 Local Oscillation Coil ■ Absolute Maximum Ratings (Ta=25˚C) Symbol Rating Supply Voltage Parameter VCC 14.4 Supply Current ICC 30 317 *1 Power Dissipation Operating Ambient Temperature Storage Temperature AN7273 PD AN7273S AN7273 AN7273 V mA mW 210 *2 –20 ~ + 75 Topr AN7273S Unit ˚C –20 ~ + 75 –55 ~ + 150 Tcsg ˚C –55 ~ + 125 AN7273S *1 Ta = 25˚C, *2 Ta = 75˚C ■ Recommended Operating Range (Ta = 25˚C) Parameter Symbol Range Operating Supply Voltage Range VCC (opr) 3 ~ 12V ■ Electrical Characteristics (VCC= 5V, Ta= 25˚C) Parameter FM Condition Total Circuit Current Itot DC measurement Demodulation Output Level VO Vi =80dBµ min. typ. max. Unit mA 9 14 20 75 100 125 mV 43.5 46 49.5 dBµ 55 64 73 dBµ V Limiting Sensitivity Vi (lim) Input at VO = –3dB Muting Sensitivity Vi (Mute) Input at VO =more than –20dB Level Meter Driving Output (1) V15–11 Vi =70dBµ 0.61 0.8 1.1 Level Meter Driving Output (2) V15–11 Vi =100dBµ 1.14 1.26 1.42 V 8 13 19 mA 100 mA Total Circuit Current Detection Output Level AM Symbol Itot DC measurement VO Vi =80dBµ 60 80 Max. Sensitivity Smax. Input at VO =10mV 4 9.5 Level Meter Driving Output (1) V15–11 Vi = –10dBµ 0 Level Meter Driving Output (2) V15–11 Vi =80dBµ Note) Unless otherwise specified, fi =10.7MHz, Mod. = 22.5kHz, fm = 400Hz (FM) fi =1MHz, Mod. = 30%, fm = 400Hz (AM) 1.12 1.25 15 dBµ 130 mV 1.38 V ICs for FM/AMTuner AN7273, AN7273S VO, S/N, THD –Vi (AM) 5 Vno –40 4 –50 3 –60 2 1 –70 THD 20 40 60 80 0 120 100 –10 12 10 –20 –30 THD 8 –40 Mod. = 80% 6 4 –50 2 –60 –70 Mod. = 30% 0 20 40 60 80 60 48 12 FF) ute O I tot (M 10 VO 8 46 6 Vi (lim) 4 44 2 VCC = 5V fi = 10.7MHz 0 fm = 400Hz, 22.5kHz 0 0.4 0.2 0 0 20 2 4 6 8 40 100 80 60 40 10 12 14 16 28 VO (Vi = 80 dBµ) 14 24 13 20 12 Itot 16 11 Vi (at V = O 10mV ) 12 0 2 4 6 8 10 10 12 14 16 Supply Voltage VCC (V) VO –Vi VO –Df 0 10 Mute OFF Mute OFF 0 Mute ON –10 Output Voltage VO (dB) –20 –20 Mute ON –30 –40 –50 –60 –60 –80 0 20 40 60 80 100 Input Voltage Vi (dBµ) 120 80 fm = 400Hz, 30% fi = 1MHz Supply VoltageVCC (V) –40 60 100 Input Voltage Vi (dBµ) 120 Input Voltage Vi (dBµ) I tot (M Total Circuit Current Itot (mA) 80 0.6 VO, Vi, Itot –VCC (AM) N) ute O 100 FM 0.8 140 14 Output Voltage VO (mV) 50 120 AM 1.0 0 120 100 Vi (lim), VO, Itot –VCC (FM) 140 1.2 Input Voltage Vi (dBµ) Input Voltage Vi (dBµ) Input Limiting Voltage Vi (lim) (dBµ) 0 Output Voltage VO (mV) –80 1.4 0dB = 81mV VCC = 5V fm = 400Hz fi = 1MHz S/N –70 –300 –200 –100 0 100 200 Input Frequency Change Df (kHz) 300 Total Circuit Current Itot (mA) –30 VCC = 5V (AM) fi = 1MHz fm = 400Hz, 30% (FM) fi = 10.7MHz fm = 400Hz, 22.5kHz VO 0 Level meter Voltage V15 (V) –20 1.6 Total Harmonic Distortion THD (%) VO V15 –Vi 10 Output Voltage VO (dB), Signal to Noise Ratio S/N (dB) VCC = 5V fi = 10.7MHz fm = 22.5kHz, 400Hz 0dB = 108mV Total Harmonic Distortion THD (%) –10 Output Voltage VO (dB) Output Voltage VO (dB), Output Noise Voltage Vno (dB) VO, Vno, THD –Vi (FM) 0 120 ICs for FM/AMTuner AN7273, AN7273S ■ Application Circuit FM D1 : MA27W + – 51Ω T2 47µF + – 0.022µF 470Ω 0.0047µF T1 0.01 µF + – 10µF 0.022µF VCC=5V + – 2.2kΩ V15 100µF 2.2µF 47Ω + – 100µF AM 5.1kΩ 0.022 µF VO (FM, AM) 27kΩ 0.022µF D1 18 17 16 1 2 3 15 14 13 12 11 10 7 8 9 AN7273/S + 6 – + – 4.7µF 5 100µF 4 0.022µF 0.022µF 2kΩ T3 10kΩ From FM Front End. CF1 Mute ON 330Ω OFF ■ Printed Circuit Board Layout FM IF Input C1 AN7273 330Ω AM ANT ANT CF1 100µF T3 4.7µF OSC 47pF CF2 1 0.022µF 0.022µF 18 0.022µF Mute SW 2.2kΩ MA27W (Matsushita) VCC 100µF 0.0047µF 100µF T1 470Ω 0.022µF 47µF 0.022µF 47Ω 10kΩ 10µF 22µF Mute Adj. T2 0.022µF AM AM IN 2.2kΩ 5.1kΩ SW FM VCC 1µF + – 27kΩ 0.01µF AF Output ICs for FM/AMTuner AN7273, AN7273S ■ Coil Specifications Symbol T1 T2 T3 Use, Freq. FM Quad. Coil 10.7MHz AM MW Osc. Coil AM Mix. Output 455kHz Type No. Maker Connection Diagram Number of Turns Tuning Cap. 1 ELF– 7S752A ELL– 7S754 EIA– 7S802A Matsushita 4 2 Matsushita 3 6 3 4 2 Matsushita 1 6 3 4 2 1 6 1 – 2 8T 2 – 3 5T 4 – 6 3T Unloaded Q 100pF 90±20% 1 – 2 4T 2 – 3 125T 4 – 6 7T — 95±20% 3 – 2 35T 6 – 4 10T 2 – 1 19T 1500pF 60±30% ■ Ceramic Filter Specification Symbol Use Type No. Maker Center Freq. Band Width Loss CF1 AM IF CFM2– 455B Toko 455kHz 7kHz (–6dB) 2.6dB