SA3375 PLL FM MULTIPLEXER STEREO DEMODULATOR DESCRIPTION The SA3375 is a multiplex IC for FM car stereos. It integrates two functions: skip-noise prevention and pilot canceling. FEATURES * Low distortion ZIP-16 * Power supply ripple rejection * Wide operating voltage range APPLICATIONS * FM stereo receivers ORDERING INFORMATION Device Package SA3375 ZIP-16 BLOCK DIAGRAM ABOSOLUTE MAXIMUM RATINGS (Tamb=25°C) Characteristics Symbol Ratings Unit Maximum Supply Voltage VCCmax 16 V Lamp Driving Current ILmax 40 mA Allowable Power Dissipation Pdmax 520 mW Operating Temperature Topr -20~+70 °C Storage Temperature Tstg -40~+125 °C HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Rev: 1.0 2005.02.03 Page 1 of 5 SA3375 ELECTRICAL CHARACTERISTICS (At Tamb=25°C, VCC=10V, VIN=300mV, f=1 kHz, L+R=90%, pilot=10%, Rg=20kΩ see specified test circuit.) Characteristics Recommended Supply Voltage Input Signal Voltage Quiescent Current Channel Separation Monaural Distortion Factor Stereo Distortion Factor Symbol Test condition Min. Typ. Max. Unit VCC 6.5 14 V VI 200 300 mV ICCO -- 28 mA Sep SW1: B 40 50 -- dB -- 0.05 0.2 % main -- 0.05 0.2 % L+R=90%, pilot=10% 60 85 120 mV -- 3 6 dB -- ±3 -- % Mono THD mono=300mV ST THD 22 Lamp Lighting Level VL Hysteresis Hy Capture Range CR Pilot=30mV Output Signal Level VO Sub 150 215 300 mV S/N Ratio S/N Rg=20kΩ 68 74 -- dB Rg=10 kΩ Input Resistance (pin3) SCA Rejection Ratio 70 78 -- dB ri -- 20 -- kΩ SCArej -- 80 -- dB THD=1%, Rg=20kΩ 700 900 -- mV THD=1%, Rg=10kΩ -- 450 -- mV Allowable Input Voltage vi SNC Output Attenuation Att SNC V8=0.6V, L-R=90%, pilot=10% -8.5 -3.0 -0.3 dB VO sub V8=0.1V, L-R=90%, pilot=10% -- -- 5 mV Att HCC (1) V7=0.6V, L+R=90%, pilot=10% -15.0 -9.0 -0.5 dB Att HCC (2) V7=1V, L+R=90%, pilot=10% SNC Output Voltage HCC Output Attenuation Power Supply Ripple Rejection VCO Stopping Voltage Channel Balance Pilot Cancellation Factor -2.0 -- 0 dB Rr -- 35 -- dB VCO stop -- 7.3 -- V CH Ba -- 0.5 1.5 dB CLp 20 25 -- dB PIN CONFIGURATIONS HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Rev: 1.0 2005.02.03 Page 2 of 5 SA3375 PIN DESCRIPTIONS Pin no. Pin name Description 1 VCC 2 IN 3 SEP Adj 4 HC constant 5 LOUT Out of L channel 6 ROUT Out of R channel 7 HCC High –cut control 8 SNC Stereo noise control 9 GND Ground 10 STLED 11, 12 FILTER1 13 CLP 14, 15 FILTER2 16 OSC Power supply. Composite input Connected to semi-fixed resister Connecter to capacitor Stereo lamp Filter of pilot detector Pilot cancel adjust Filter of phase comparator VCO OSC FUNCTION DESCRIPTION 1. SNC and HCC The SA3375 has SNC (stereo noise control) and HCC (high-cut control) terminals for improving S/N ratios when operating in weak radio fields. 2. Pilot canceling circuit Canceling signal is a sawtooth wave obtained by integrating a square wave that is proportionate in amplitude to pilot level with C and R. 3. Separation adjustments The SA3375 by itself exhibits separation only in a 25 to 30 dB range. If a phase correction circuit is provided in the SA3375 input circuit, it can exhibit intrinsic separation characteristics, typically 50 dB. 4. VCO stopped When applying a voltage not less than 7 V to the HCC terminal (pin 7) VCO will be stopped and SA3375 will work in monaural mode. HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Rev: 1.0 2005.02.03 Page 3 of 5 SA3375 TEST CIRVUIT HCC SNC GND STLED Filter1 11 13 14 15 16 1 1 SW2 C 1K 1k 12k 3.3 A B 1K 4.7 Composite input 12 OSC ROUT 10 Filter2 LOUT 9 Filter2 HC constant 8 CLP SEP adj 7 Filter1 IN 6 100K +VCC 1000p A B 5 0.022 VR 4 0.6V 0.1V 3.0V Separation adjust 3 100 A 2 SW1 B Rg 0.047 100 1 2.2k +VCC VCC SA3375 10k 3300p Pilot cancel asjust 1500p LOUT 0.015 ROUT 3.3k 3.3k 0.015 TYPICAL APPLICATION CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Rev: 1.0 2005.02.03 Page 4 of 5 SA3375 PACKAGE OUTLINE ZIP-16 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn UNIT: mm Rev: 1.0 2005.02.03 Page 5 of 5