AM/FM 1 CHIP RADIO S1A0426C01 INTRODUCTION The S1A0426C01 is a monolithic integrated circuit designed for radio-cassette tape recorders, clock radios and headphone radios. 30−SDIP−400 FUNCTIONS • • • • • AM/FM RF AMP AM AGC Control Audio Power AMP DC Volume FM Quadrature DET • • • • • Local OSC FM AFC Control Tuning Indicator AM/FM IF AMP AM DET 28−SOP−375 FEATURES • Built-in AM/FM Switching Circuit • Wide operating supply voltage: VCC = 2V − 8.5V • Low current consumption (VCC = 3V) — FM: ICCQ = 7.0mA (Typ) — AM: ICCQ = 3.5mA (Typ) • High Power Audio Amplifier: 0.5W (typ) at VCC = 6V, RL = 8, THD = 10% ORDERING INFORMATION Device Package Operating Temperature S1A0426C01-A0B0 30−SDIP−400 −20°C − +70°C S1A0426C01-S0B0 28−SOP−375 −20°C − +70°C 1 S1A0426C01 AM/FM 1 CHIP RADIO BLOCK DIAGRAM 30 GND AM OUT VCC 29 28 (28) Ripple Filter AF IN DET OUT AFC AGC AFC AGC 27 26 25 24 23 22 (27) (26) (25) (24) VOL (23) (22) IF TUNING GND METER N.C 21 (21) 20 (20) FM IF IN 19 AM BAND IF IN SELECT 18 (19) (19) 17 (17) 16 (16) (15) Tuning Meter FM/AM IF DET/AGC PWR AM F/E FM F/E (1) 1 (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) 2 3 4 5 6 7 8 9 10 11 12 GND FM Disc VOL NF AM OSC AFC FM OSC REG OUT FM RF AMRF IN N.C (12) 13 (13) 14 FM RF RF IN GND (14) 15 FM/AM IF OUT NOTE: ( ) 28-SOP Package ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Characteristic Symbol Value Unit Supply Voltage VCC 9 V Power Dissipation PD 1000 mW Operating Temperature TOPR −20 − +70 °C Storage Temperature TSTG −40 − +125 °C 2 AM/FM 1 CHIP RADIO S1A0426C01 ELECTRICAL CHARACTERISTICS (VCC = 6V, Ta = 25°C, FM; ∆f = 22.5kHz, fm = 1kHz, AM; 30% Mod, unless otherwise specified) Characteristic FM AF Test Condition Min. Typ. Max. Unit Quiescent Circuit Current ICCQ VI = 0 − 7.0 14.0 mA F/E Voltage Gain GV1V VI(1) = 40dBµ, fc = 100MHz, ∆f = 0 32 39 46 dB Detect Output Gain VO(1) VI(3) = 90dBµ, fi = 10.7MHz −26 −20 −14 dBm IF-3 dB Sensitivity VI (LIM) Vo(VI3) = 90dBµ, -3dB, fi = 10.7MHz − 24 32 dBµ Total Harmonic Distortion THD1 VI(3) = 90dBµ, fi = 10.7MHz(∆f = 75kHz) − 0.3 2.0 % Meter Drive Current IM (1) VI(3) = 60dBµ, fi = 10.7MHz 1.8 3.5 7.0 mA VI = 0 − 3.5 10.0 mA Quiescent Circuit Current AM Symbol ICCQ(2) F/E Voltage Gain GV(2) VI(2) = 60dBµ, fc = 1660kHz, m=0% 15 22 29 dB IF Voltage Gain GV(3) Vo(3) = -34dBm, fi = 455kHz 14 20 27 dBµ AM Detect Output Voltage VO(2) VI(3) = 85dBµ, fi = 455kHz −26 −20 −14 dBm Total Harmonic Distortion THD2 VI(2) = 95dBµ, fc= 1660kHz, Vcc = 7.8V − 0.6 2.0 % Meter Drive Current IM(2) VI(3) = 85dBµ, fi = 455kHz 1.3 3.0 7.0 mA Closed Loop Voltage Gain GV(4) Vo(4) = 0dBm, f = 1kHz 27 31.5 36 dB Total Harmonic Distortion THD3 Po = 50mW, f = 1kHz − 0.3 2.5 % 0.4 0.5 − W Output Power PO RL = 8Ω, THD = 10%, f = 1kHz 3 4 BAT T 50kΩ VR 8.2kΩ S1 220µF 1 30 (1) (28) 150Ω *10.7MHz 2 29 3 28 (2) (27) 0.1µF 4 27 6pF (3) (26) 470µF L4 5 26 6 25 D1 4.7µF (4) (25) 10µF 100kΩ (5) 24 (23) 23 (22) 10µF 22 (21) 4.7µF L3 1pF (6) 22pF 7 8 (7) L2 (8) 18pF 9 S1A0426C01 (24) 0.47µF 1kΩ 0.022µ F 10 21 (9) (20) 11 20 2pF (10) (19) 10µF L1 12 19 (11) (18) 13 18 (13) (12) BPF 15 16 (14) (15) T1 ANT * CDA 10.7MG 89-A (MURATA) 10µF (16) 14 17 C-F 455MHz 330Ω C-F 10.7MHz (17) 0.01µF 0.1µF 100pF 2.2kΩ 0.01µ F FM AM S2 S1A0426C01 AM/FM 1 CHIP RADIO APPLICATION CIRCUIT