FM FRONT END S1A0497X01 INTRODUCTION The S1A0497X01 is a monolithic integrated circuit designed for the FM front end of portable radio cassettes or music centers. It consists of RF AMP, local OSC buffer and mixer. Compared with conventional types, it is improved in the following characteristics: — Low supply voltage 9−SIP — Strong input — Spurious radiation 14−SOP FEATURES • Wide supply voltage range: VCC = 1.6V − 6.0V • Low local oscillation stop voltage: VSTOP = 0.9V (Typ) • mproved inter-modulation characteristics by double balanced type mixer circuit • Low spurious radiation • Built-in clamping diode in the mixer output stage ORDERING INFORMATION Device Package S1A0497X01-I0B0 9−SIP S1A0497X01-S0B0 14−SOP Operating Temperature −25°C − +75°C 1 S1A0497X01 FM FRONT END BLOCK DIAGRAM RF AMP LOCAL OSC OSC BUFF MIX VREF (8) (11) (12) (13) (14) 1 2 3 4 5 RF INPUT BYPASS RF OUTPUT MIX IN GND (3) 6 (4) 7 MIX OSC OUTPUT OUTPUT (5) (7) 8 9 OSC VCC NOTE: ( ) means 14-SOP-Package NC: (1), (2), (6), (9), (10) ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Characteristic Supply Voltage Power Dissipation PD Symbol Value Unit VCC 8 V S1A0497X(9-SIP) 600 S1A0497X(14-SOP) 300 mW Operating Temperature TOPR − 25 − +75 °C Storage Temperature TSTG − 55 − +150 °C NOTE: Derated above Ta = 25 °C in the proportion of 4mW/°C 2 FM FRONT END S1A0497X01 ELECTRICAL CHARACTERISTICS (Ta = 25 °C ( VCC = 5 V, f = 98MHz, fm = 1kHz, ∆f = ± 22.5KHz, unless otherwise specified) Characteristic Quiescent Circuit Current -3dB Limiting Sensitivity Symbol ICCQ VI(LIM) Test Conditions Min. Typ. Max. Unit VL = 0 − 5.0 8.0 mA VD (VI = 60 dBµ)-3dB Down − 3.0 7.0 dBµ Conversion Gain GV VI = 60 dBµ 25 31 − dB Usable Sensitivity SUSA S/N = 30dB − 11 − dBµ Oscillation Voltage VOSC fOSC = 108MHz 90 165 250 mV Oscillation Stop Voltage VSTOP − − 0.9 1.3 V 3 2 1 FM S.G Zo=75Ω BPF (11) (8) T1 4 3 15pF 5 6 (3) 150pF 7 (4) ( ) : KA22497D (14) 4.7pF (13) (12) S1A0497X01 T2 Vcc T3 100µF 0.01µF Vosc 9 8 0.01µF (7) (5) 10k Ω C.F 15k Ω 0.01µF KSC838-0 0.01µF C.F 330Ω 1kΩ 4 15pF 100Ω 0.01µF 2 330Ω 1 0.01µF 5 4 S1A2245X01 3 C1 L Tank coil 6 C2 7 10pF 100pF FM MPX R L Vcc S1A0497X01 FM FRONT END TEST CIRCUIT (ICCQ, VI(LIM), SUSA, GV, VOSC, VSTOP) 1000pF FM FRONT END S1A0497X01 COIL SPECIFICATIONS (BOTTOM VIEW) T1 (L1) FM RF * In a Diameter of 5.5 mm f (MHz) QO Turns 98 100 4 f (MHz) QO Turns 98 100 3 0.8 mm φ UEW * T2 (L2) FM OSC * In a Diameter of 5.5 mm 0.8 mm φ UEW * T3 FM IFT 3 4 CO (pF) 2 5 1-3 1 6 75 f (MHz) 10.7 QO Turns 1-3 1-3 4-6 115 12 1 KOREA TOKO 0.12 mm φ UEW 5 S1A0497X01 FM FRONT END T1 (L1) FM RF F (MHz) Qo Turns D WIRE KWANG SUNG PART NO 98 100 4 5.5¢ 0.8¢ KSS-SPI F (MHz) Qo Turns D WIRE KWANG SUNG PART NO 98 100 3 5.5¢ 0.8¢ KSS-SP2 F (MHz) Q0 KSS-SP1 T2 (L2) FM RF OSC KSS-SP2 T3 FM IFT 3 4 C 0 (pF) 2 5 1-3 1 6 KSI-FA1 6 75 10.7 Turns 1-3 1-3 4-6 KWANG SUNG PART NO 115 12 1 KSI-FA1 S1A0497X01 LOCAL OSCILLATION VOLTAGE AMBIENT TEMPERATURE LOCAL OSCILLATION FREQUENCY DEVIATION, LOCAL OSCILLATION VOLTAGE.SUPLY VOLTAGE 100 300 ∆f 200 0 VOSC -100 100 -200 0 2 4 6 8 10 VCC(V), SUPPLY VOLTAGE QUIESCENT CIRCUIT CURRENT-SUPPLY VOLTAGE VOSC(mV), LOCAL OSCILLATION VOLTAGE 300 VOSC(mV), LOCAL OSCILLATION VOLTAGE ∆f(KHz), LOCAL OSCILLATION FREQUENCY DEVIATION FM FRONT END VCC = 5V fOSC = 108MHz 200 100 0 0 -20 VI(LIM) (dBµ), -3dB LIMITING SENSITIVITY SUSA (dBµ), USABLE SENSITIVITY 6 4 2 0 0 2 4 6 8 VCC(V), SUPPLY VOLTAGE 30 20 SUSA 10 VI(LIM) 10 SENSITIVITY-AMBIENT TEMPERATURE 40 VI(LIM) (dBµ), -3dB LIMITING SENSITIVITY SUSA (dBµ), USABLE SENSITIVITY f = 98MHz fm = 1KHz ∆f = 22.5KHz dev. 0 VCC = 5V f = 98 MHz fm = 1KHz ∆f = 22.5KHz dev. 30 20 SUSA 10 VI(LIM) 0 -20 0 20 40 60 Ta(°C), AMBIENT TEMPERATURE 80 0 ∆f(1KHz), LOCAL OSCILLATION FREQUENCY DEVIATION ICCQ (mV), QUIESCENT CIRCUIT CURRENT 40 VI = 0 80 SENSITIVITY-SUPPLY VOLTAGE 10 8 0 20 40 60 Ta(°C), AMBIENT TEMPERATURE 2 4 6 8 VCC(V), SUPPLY VOLTAGE 10 LOCAL OSCILLATION FREQUENCY DEVIATION AMBIENT TEMPERATURE TEMPERATURE 200 VCC = 5V f = 98 MHz fm = 1KHz dev. 100 0 100 -200 -20 0 20 40 60 Ta(°C), AMBIENT TEMPERATURE 80 7 S1A0497X01 FM FRONT END APPLICATION INFORMATION RF AMP The RF AMP is a common base type, so the operating frequency range is improved. The GND of the bypass capacitor (Pin 2) should be located closely at Pin 5 (GND). When using the bypass capacitor at VCC-line of Pin 3. We can expect an improvement of the S/N ratio. FM ANT BIAS 1 2 3 15p 75Ω B. P. F 1000p 75Ω T1 VCC MIXER The mixer stage uses a double balanced type in order to protect the leakage of OSC, spurious radiation. Also, this is built into the limiter in order to improve the strong input characteristic. VCC MIX OUT IF AMP 6 VCC OSC OUT MIX IN 4 BIAS 8 FM FRONT END S1A0497X01 LOCAL OSCILLATION The local oscillator uses a colpitts oscillator for stable oscillation at high frequency. This is built into the OSC buffer in order to stably operate the OSC frequency and OSC voltage at strong input. VCC MIX OSC BUFF 8 15p 15p 9 L2 3 0.6¥÷ 4t 100pF C14 Q3 C1 8pF C3 470pF L1 100kΩ R5 C6 15pF 9 C8 R1 33kΩ T3 Q10 C1674 FM RF ( KSS-SP1 : KWANG SUNG ) R10 10Ω Q4 C18 8pF C2 5pF 8 0.047µF C21 100pF C20 R12 1kΩ 100pF C30 R6 2.7kΩ 10kΩ R13 120Ω Q5 C1674 R7 390Ω 223pF 1 16 2.2kΩ 2 15 13 12 AM ANT 11 2 1 3 4 5 6 C39 20pF 7 10 4 3 8 9 T2 19 18 C14 1µF 17 4.7kΩ 5 6 7 13 12 14 11 15 10 9 X1 456K Q1 R2002 16 C16 1 3 39pF C44 6pF 8pF 1 2 12 3 U2 4 6 12 5 DC - AC CONVERTER CO1 6 4 C50 C51 Q6 C945 C24 4.7µF /50V C26 4.7µF /50V 5CDM - 658N - 1085 8 S1A2298A0 1 IF + MPX 20 450K 21 0.022µF 22 C38 470pF 23 24 BU2614 - PLL 14 C40 8pF C41 0.022µF F2 10.7MHz 10kΩ C43 2.2µF/50V 0.022µF 7 C7 0.047µF FM OSC ( KSS-SP2 : KWANG SUNG ) T1 : AM IFT ( 7MC - K5050N : KR TOKO ) AM IFT ( KSI - AA1 : KWANG SUNG ) T2 : AM OSC ( A7BR - KS141010X2 : TOKO ) AM OSC ( KSI - AO5 : KWANG SUNG ) T3 : FM IFT ( A119AC - 680122X3 : KR TOKO ) FM IFT ( KSI-FA1 : KWANG SUNG ) F1 : AHCFM2 - 450BL ( TOKO ) F2 : CFE 10.7MA ( MURATA ) X2 : CDA 10.7MG65-A ( MURATA ) X1 : CFB456F - 18 ( MURATA ) H2 : KV1236Z ( TOKO ) Q3, Q4 : KV1310NT (TOKO ) L2 : L1 : C29 0.047µF R9 33kΩ C11 0.047µF C17 470§Ü 6 C36 C12 0.047µF 5 R17 100kΩ BPF 4 R14 330pF C4 C33 0.022µF 3 C42 20pF 0.068µF C32 S1A0497X 0 1 FM FRONT END 100pF C5 R5 0.047µF C15 4.7µF/50V 2 100µF /50V R8 L3 4.7kΩ 100µ H 100kΩ 100pF 560Ω R15 F1 270kΩ 560Ω R16 1 22kΩ 22pF 0.047µF 22pF T1 A733 C23 0.018µF 0.082µF C34 0.01µF C22 C13 100pF C31 0.01µF 5.6kΩ R4 10kΩ L5 TOKO.INC 100µH 4.7kΩ TK11822M R20 Q7 C945 R3 10kΩ 4.7µF /50V SW1 C27 C47 0.047µF C45 0.047µF 0.018µF C35 4.7µF /50V C46 100µF /10V X2 C48 0.047µF 10 C49 100µF/10V Q1 R2002 R21 4.7kΩ L 8V GND 3V RADIO ON ST SD/IF GND VDD AM OSC FM OSC BUZZER MUTE R G S1A0497X01 FM FRONT END APPLICATION CIRCUIT U-COM CONTROL