SA3370 PLL FM MULTIPLEXER STEREO DEMODULATOR DESCRIPTIONS The SA3370 is a multiplex IC for FM car stereo. It integrates two functions: stereo noise control and high-cut control. FEATURES * Low distortion factor * Power supply ripple rejection ZIP-16 * Wide operating voltage range APPLICATIONS * FM car stereo ORDERING INFORMATION Device Package SA3370 ZIP-16 M ai n H i cu gh t BLOCK DIAGRAM ABOSOLUTE MAXIMUM RATINGS (Tamb=25°C) Characteristics Symbol Rating Unit Maximum Supply Voltage VCCmax 16 V IL 40 mA Pd max 520 mW Lamp Driving Current Allowable Power Dissipation Operating Temperature Topr -20~+70 °C Storage Temperature Tstg -40~+125 °C Recommended Supply Voltage VCC 6.5 ~ 14 V Input Signal Voltage VIN 200 ~300 mV HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Rev: 1.0 2005.02.03 Page 1 of 4 SA3370 ELECTRICAL CHARACTERISTICS (At Tamb=25°C, VCC=10V, VIN=300mV, f=1 kHz, L+R=90%, pilot=10%, see specified test circuit.) Characteristics Symbol Test condition Min. Typ. Max. Unit Quiescent Current ICCO -- 21 27 mA Channel Separation Sep 40 50 -- dB -- 0.05 0.2 % Monaural Distortion Factor Mono THD mono=300mV Stereo Distortion Factor ST THD main -- 0.05 0.2 % 60 85 120 mV -- 3 6 dB -- ±3 -- % 140 200 280 mV S/N 70 78 -- dB RIN -- 20 -- kΩ SCArej -- 80 -- dB Lamp Lighting Level VL Hysteresis Hy Capture Range CR Pilot=30mV Output Signal Level VO Sub S/N Ratio Input Resistance (pin3) SCA Rejection Ratio Allowable Input Voltage L+R=90%, pilot=10% THD=1%, Rg=20kΩ 700 800 -- mV SNC Output Attenuation Att SNC V8=0.6V, L-R=90%, pilot=10% VIN -8.5 -3.0 -0.3 dB SNC Output Voltage VO sub V8=0.1V, L-R=90%, pilot=10% -- -- 5 mV V7=0.6V, L+R=90%, pilot=10% -15.0 -6.0 -0.5 dB V7=1V, L+R=90%, pilot=10% -2.0 -- 0 dB Rr -- 35 -- dB VCO stop -- 6.8 -- V CH Ba -- 0.5 1.5 dB Att HCC (1) HCC Output Attenuation Att HCC (2) Power Supply Ripple Rejection VCO Stopping Voltage Channel Balance OSC FILTER2 FILTER2 FFOUT FILTER1 FILTER1 STLED GND SNC HCC ROUT LOUT HC constant SEP Adj VCC IN PIN CONFIGURATIONS PIN DESCRIPTIONS Pin no. Pin name Description 1 VCC 2 IN Composite input 3 SEP adj Separation adjust Power supply. (To be continued) HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Rev: 1.0 2005.02.03 Page 2 of 4 SA3370 (Continued) Pin no. Pin name Description 4 HC constant 5 LOUT Left channel output 6 ROUT Right channel output 7 HCC When a voltage of 7.5V or higher is applied to this pin, VCO stopped 8 SNC Forced monaural mode when this pin is connected to ground 9 GND Ground 10 STLED Open-collector output can directly drive LED 11, 12 Filter1 Pilot detector low-pass filter 13 FFOUT 19KHz out 14, 15 Filter2 Ripple Filter 16 OSC High cut constant Connected a semi-fixed resister FUNCTION DESCRIPTIONS 1. SNC (stereo noise control) and HCC (high-cut control) The SA3370 has SNC and HCC terminals for improved S/N ratios when operating in weak radio fields. By adjusting. The S/N ratios will be improved through the SNC (stereo noise control) and HCC (high-cut control) terminals. 2. Muting function Muting in the neighborhood of 37dB are feasible by utilizing HCC functions as muting functions. 3. VCO stopped When applying a voltage not less than 7V to the HCC terminal, VCO will be stopped and the circuit will work in monaural mode. 4. Separation control The separation of SA3370 can be changed by the external semi-resistor. TEST CIRCUIT HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn Rev: 1.0 2005.02.03 Page 3 of 4 SA3370 STLED OSC Filter2 Filter1 Filter1 SNC HC constant 3.3k HCC SEP adj ROUT LOUT 3.3k Filter2 TYPICAL APPLICATION CIRCUIT PACKAGE OUTLINE ZIP-16 HANGZHOU SILAN MICROELECTRONICS CO.,LTD Http: www.silan.com.cn UNIT: mm Rev: 1.0 2005.02.03 Page 4 of 4