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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 * Wide operating voltage range
ZIP-16
APPLICATIONS
* FM car stereo
ORDERING INFORMATION
Device SA3370 Package ZIP-16
BLOCK DIAGRAM
ABOSOLUTE MAXIMUM RATINGS (Tamb=25C) Characteristics Maximum Supply Voltage Lamp Driving Current Allowable Power Dissipation Operating Temperature Storage Temperature Recommended Supply Voltage Input Signal Voltage Symbol VCCmax IL Pd max Topr Tstg VCC VIN Rating 16 40 520 -20~+70 -40~+125 6.5 ~ 14 200 ~300 Unit V mA mW C C V mV
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
M ai n H i cu gh t
Rev: 1.0
2005.02.03 Page 1 of 4
SA3370
ELECTRICAL CHARACTERISTICS (At Tamb=25C, VCC=10V, VIN=300mV, f=1 kHz, L+R=90%, pilot=10%,
see specified test circuit.) Characteristics Quiescent Current Channel Separation Monaural Distortion Factor Stereo Distortion Factor Lamp Lighting Level Hysteresis Capture Range Output Signal Level S/N Ratio Input Resistance (pin3) SCA Rejection Ratio Allowable Input Voltage SNC Output Attenuation SNC Output Voltage Symbol ICCO Sep Mono THD mono=300mV ST THD main VL Hy CR VO S/N RIN SCArej VIN VO sub Att HCC HCC Output Attenuation (1) Att HCC (2) Power Supply Ripple Rejection VCO Stopping Voltage Channel Balance Rr VCO stop CH Ba THD=1%, Rg=20k V8=0.1V, L-R=90%, pilot=10% V7=0.6V, L+R=90%, pilot=10% V7=1V, L+R=90%, pilot=10% Att SNC V8=0.6V, L-R=90%, pilot=10% Pilot=30mV Sub L+R=90%, pilot=10% Test condition Min. -40 --60 --140 70 --700 -8.5 --15.0 -2.0 ---Typ. 21 50 0.05 0.05 85 3 3 200 78 20 80 800 -3.0 --6.0 -35 6.8 0.5 Max. 27 -0.2 0.2 120 6 -280 -----0.3 5 -0.5 0 --1.5 Unit mA dB % % mV dB % mV dB k dB mV dB mV dB dB dB V dB
PIN CONFIGURATIONS
FILTER1
FILTER1
FILTER2
FILTER2
SEP Adj
IN
HCC
SNC
GND
STLED
HC constant
LOUT
ROUT
PIN DESCRIPTIONS
Pin no. 1 2 3 Pin name VCC IN SEP adj Power supply. Composite input Separation adjust
(To be continued)
Description
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
FFOUT
Rev: 1.0
OSC
VCC
2005.02.03 Page 2 of 4
SA3370
(Continued)
Pin no. 4 5 6 7 8 9 10 11, 12 13 14, 15 16
Pin name HC constant LOUT ROUT HCC SNC GND STLED Filter1 FFOUT Filter2 OSC High cut constant Left channel output Right channel output
Description
When a voltage of 7.5V or higher is applied to this pin, VCO stopped Forced monaural mode when this pin is connected to ground Ground Open-collector output can directly drive LED Pilot detector low-pass filter 19KHz out Ripple Filter 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
TYPICAL APPLICATION CIRCUIT
Filter2
HC constant
SEP adj
Filter2
OSC STLED Filter1
ROUT
3.3k
PACKAGE OUTLINE ZIP-16 UNIT: mm
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
3.3k
Filter1
LOUT
HCC
SNC
Rev: 1.0
2005.02.03 Page 4 of 4

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