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| FM IF FOR CAR RADIO S1A2245X01 INTRODUCTION The S1A2245X01 is a monolithic integrated circuit consisting of an FM IF amplifier and detector. It is suitable for car radios. 7-SIP FUNCTIONS * * 3-stage IF amplifier Peak detector FEATURES * * * * * * * * Suitable for FM car radios Wide operating supply voltage range: VCC = 8V - 14V High detector output voltage (VO = 500mV, Typ) Excellent AM rejection: AMR = 50dB (Typ) High sensitivity: VI (LIM) = 50dBV (Typ) Simplified single coil tuning Low distortion (THD = 0.1 %: Typ) Minimum number of external parts required ORDERING INFORMATION Device S1A2245X01-I0U0 Package 7-SIP Operating Temperature -20C - +70C 1 S1A2245X01 FM IF FOR CAR RADIO BLOCK DIAGRAM VCC 3 Regulated Power Supply INPUT 1 IF AMP FM DET 7 BYPASS 2 AF OUTPUT 4 GND 5 DET 6 DET ABSOLUTE MAXIMUM RATINGS (Ta =25C) Characteristic Supply Voltage Input Voltage Power Dissipation Operating Temperature Storage Temperature NOTE: Derated above Ta = 25C in the proportion of 4 mW/C Symbol VCC VI PD TOPR TSTG Value 15 0.7 400 -20 - +70 -40 - +125 Unit V V mW C C 2 FM IF FOR CAR RADIO S1A2245X01 ELECTRICAL CHARACTERISTICS (Ta = 25C, VCC = 12V, f = 10.7MHz, fm = 400Hz) Characteristic Quiescent Circuit Current - 3dB Limiting Sensitivity AM Rejection Ratio Detector Output Voltage Total Harmonic Distortion Signal to Noise Ratio Symbol ICCQ Vl(LlM) AMR VO THD S/N VI = 0 -3dB point from VO, VI = 80dB, f = 75kHz FM: f = 75kHz dev AM: 30 % Mod Vl = 80dB f = 75kHz dev VI = 80dBV f = 225kHz dev VI = 80dBV f = 75kHz dev VI = 80dBV Test Conditions Min. 8 - - 300 - - Typ. 12 50 50 500 0.2 60 Max. 15 55 - 700 - - Unit mA dB dB mV % dB TEST CIRCUIT VCC Tank Coil L C1 10p 0.01 0.01 INPUT 50 2 4 0.01 1 S1A2245X01 C2 7 AF OUT C3 0.01 3 S1A2245X01 FM IF FOR CAR RADIO APPLICATION CIRCUIT 0.01 100 330 0.01 L (Tank Coil) 3 CF 5 1 330 2 C1 6 7 FM MPX +VCC 15K C2 10p FRONT END CF KSC838-0 10K 0.01 1K 0.01 S1A2245X01 4 L R 0.01 1 f o = ------------------------------------------- C2 2 L C1 + ------- 2 COIL SPECIFICATIONS 1 2 3 4 5 6 Co(pF) 27 f(MHz) 10.7 Qo(%) 150 Turns 4-6 18 - - - - 4 |
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