FM 1 CHIP RADIO S1A0429A01 INTRODUCTION 16−SOP−225 The S1A0429A01 is a monolithic integrated circuit designed for Portable FM radios. It consists of an RF input stage, mixer, IF, mute control and loop (earphone drive) Amp. It is suitable for a pocket-size radio. FUNCTIONS • RF input stage • Mixer • Mute control • Local OSC • IF Amp • Earphone drive amp FEATURES • Minimum number of external parts required • Single trimmer tuning • No FM det coil • FLL IF detect system (76kHz) • Operating voltage: VCC = 1.8V − 6.0V ORDERING INFORMATION Device Package Operating Temperature S1A0429A01-S0B0 16−SOP−225 −10°C − + 70°C 1 S1A0429A01 FM 1 CHIP RADIO BLOCK DIAGRAM MPX FILTER 16 15 MPX OUTPUT BYPASS RF IN 14 13 + AF − MPX FILTER SINGLE STRENGTH AF IF FILTER 12 11 10 9 RF AMP MIX MUTE CONTROL IF STAGE DEMODULATOR & CORRELATOR 1 DEMOD OUT 2 MUTE 3 GND STAB OSC 4 5 6 TUNE IF IN(-) Vcc 7 8 IF FILTER ABSOLUTE MAXIMUM RATINGS ( Ta = 25°C ) Characteristic Symbol Value Unit Supply Voltage VCC 7 V Oscillator Voltage VOSC −0.5 − + 0.5 V Operating Temperature TOPR −10 − + 70 °C Storage Temperature TSTG −55 − + 150 °C Thermal Resistance Junction to Ambient REJA 300 K/W 2 FM 1 CHIP RADIO S1A0429A01 ELECTRICAL CHARACTERISTICS MONO CONDITION: f = 98MHz, fm = 1kHz, ∆f = ± 22.5kHz, V = 50dBµ, Ta = 25°C, VCC = 3V Characteristic Symbol Test Conditions Min. Typ. Max. Unit ICCQ VI = 0 − 6.3 − mA Sensitivity SVI1 SVI2 −3dB: Mute Disable SIN = 26dB: Mute Enable − 12 17 − dBµ dBµ Signal to Noise Ratio S/N1 − − 60 − dB Total Harmonic Distortion THD1 THD2 ∆f = ± 22.5kHz ∆f = ± 75kHz − 0.7 2.3 − % % AM Rejection Ratio AMR AM: fm = 1kHz, m = 80% FM: fm = 1kHz, ∆f = 75kHz − 50 − dB Oscillator Voltage VOSC − − 250 − mV AFC Range ∆AFC − − 160 − kHz Mute Range MR − − 120 − kHz Band Width BW − 10 − kHz AF Output Voltage VO1 − 90 − mV MONO Quiescent Circuit Current ∆VO = 3dB Pre-Emphasis t = 5kHz − 3 S1A0429A01 FM 1 CHIP RADIO TEST CIRCUIT Field Strength S.G AF OUT PUT 75Ω 8.2kΩ 4700pF 0.1µ F 16 3300pF 15 220pF 14 13 220pF 12 11 10 9 6 7 8 S1A0429A01 1 2 3 4 5 0.01µ F 10kΩ 0.1µ F 820pF 56nH 0.1µ F 1500pF 0.01µ F VCC Figure 1. Test Circuit for Mono Operation 4 0.1µ F FM 1 CHIP RADIO S1A0429A01 Field Strength L (MONO.STEREO) STEREO DECODER Vmux 680pF 2200pF S.G R Rs = 75 Ω 10k Ω 0.1µ F 3300pF 1kΩ 3300pF 220pF 220pF 0.1µ F 16 15 14 13 12 11 10 9 6 7 8 S1A0429A01 1 2 3 4 5 0.01 µ F 330pF 0.01 µF 0.1µ F 56nH 0.1µ F 1500pF V CC Figure 2. Test Circuit for Stereo Operation 5 S1A0429A01 FM 1 CHIP RADIO APPLICATION CIRCUIT AF OUTPUT FM ANT 10k Ω 220pF 0.1µ F 56pF 8.2k Ω 68pF 3300pF 3300pF 1kΩ 16 15 14 13 12 11 10 9 6 7 8 S1A0429A01 1 2 3 4 5 0.01 µ F 820pF VCC 6 56nH 39pF 22pF 0.1µ F 0.01 µ F 0.1 µF 1500pF 0.1 µF