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| ICs for FM/AM Tuner AN7223 AM Tuner, FM/AM IF Amplifier Circuit for Radio Cassette Recorder s Overview 1 18 17 16 14 13 12 11 10 0.51min. 6.30.25 3.80.25 (3.45) 2.54 0.3 - + 0.1 5 0.2 Unit : mm 0.50.1 1.20.25 14 VCC 1 7 AM/FM IF Amp. FM IF Amp. FM Quad. Det. Mute Det. 17 16 13 15 The AN7223 is an IC designed for high-class radio cassette recorder with multifunctioned FM/AM IF system. s Features * Wide operating supply voltage range : VCC= 2.8V~12V * Incorporating both FM and AM detectors * Incorporating a level indicator output (FM/AM common use) 2 3 21.70.3 4 5 6 7 8 9 15 * AM : High sensitivity,including RF amplifier * Low power consumption * Muting control * AFC control * Fewer external parts * High stability on both AM and FM * Low shock noise level from function switch operation * SW band available (f= 30MHz) 3 ~ 15 7.620.25 18-Lead DIP Package (DIP018-P-0300E) s Block Diagram 8 9 12 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) 10 11 GND ICs for FM/AM Tuner s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 VCC (AM) AM RF Amp. Input AM Mixer Output AGC Output (2) AGC Output (1) AM IF Amp. Input IF By-pass IF By-pass Pin Name FM IF Amp. Input Pin No. 10 11 12 13 14 15 16 17 18 GND FM Detector Coil AF Output VCC Level Meter Output AFC Output Reference Voltage Local Oscillation Pin Name AM Detection Output AN7223 s Absolute Maximum Ratings (Ta=25C) Parameter Supply Voltage Power Dissipation Operating Ambient Temperature Storage Temperature Symbol VCC PD Topr Tstg Rating 14.4 317 -20 ~ + 75 -55 ~ + 150 Unit V mW C C s Electrical Characteristics (VCC =5V, Ta= 25C) Parameter Total Circuit Current Demodulation Output Level Limiting Sensitivity FM Muting Sensitivity Signal Meter Driving Output 1 Signal Meter Driving Output 2 Total Circuit Current Detection Output Level AM Max.Sensitivity Signal Meter Driving Output 1 Signal Meter Driving Output 2 Symbol Itot O (FM) Vi (lim) Condition (DC measurement) Vi= 80dB, f=10.7MHz, fdev.= 22.5kHz, fm= 400Hz Input at O= -3dB Input at O= less than -20dB Vi= 50dB, f=10.7MHz, fdev.= 22.5kHz, fm= 400Hz Vi= 80dB, f= 10.7MHz, fdev.= 22.5kHz, fm= 400Hz (DC measurement) Vi= 80dB, f= 1MHz, Mod.= 30%, fm= 400Hz Input at O= 10mV Vi= -10dB, f= 1MHz, Mod.= 30%, fm= 400Hz Vi= 80dB, f= 1MHz, Mod.= 30%, fm= 400Hz min. 9 75 41.5 45 120 1.14 8 60 4.5 0 1.12 typ. 14 100 44.5 50 600 1.26 13 80 9.5 max. 20 125 47.5 59 1150 1.42 19 100 12.5 130 Unit mA mV dB dB mV V mA mV dB mV V Vi (mute) V15 V15 Itot O (AM) Smax. V15 V15 1.25 1.38 AN7223 s Application Circuit FM 0.022F 100F AM + - 47F V15 + 6 - 22F + - 10F 5.1k + - 100F + - 47 ICs for FM/AM Tuner VCC (5V) 0.022F 470 0.0047 F 0.01F 27k 0.022F VO (FM.AM) T2 47pF 3 1 2.2k T1 1 4 0.022F 12 11 10 18 17 16 15 14 13 AN7223 1 2 3 4 100F 5 + - + - 6 4.7F 7 8 9 0.02F 6 47pF 2.1k 0.02F 3 4 to Front End 10k 1 T3 Mute ON OFF s Coil Specifications Symbol Use, Freq Type No. Maker Connection Diagram 3 EIF- 7S752A MATSUSHITA 2 1 3 T2 AM MW Osc. Coil ELL- 7S754 MATSUSHITA 2 1 3 EIA- 7S802A MATSUSHITA 2 1 6 6 4 6 4 4 Number of Turns 1 - 2 8T 2 - 3 5T 4 - 6 3T Tuning Cap. Unloaded Q T1 FM Quad. Coil 10.7MHz 100pF 9020% 1 - 2 4T 2 - 3 125T 4 - 6 7T 9520% T3 AM Mix. Output 455kHz 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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