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
(T
amb
=25°C)
Characteristics
Maximum Supply Voltage
Lamp Driving Current
Allowable Power Dissipation
Operating Temperature
Storage Temperature
Recommended Supply Voltage
Input Signal Voltage
Symbol
V
CCmax
I
L
P
d max
T
opr
T
stg
V
CC
V
IN
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
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cu gh
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Rev: 1.0
2005.02.03
Page 1 of 4
SA3370
ELECTRICAL CHARACTERISTICS
(At T
amb
=25°C, V
CC
=10V, V
IN
=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
I
CCO
Sep
Mono THD mono=300mV
ST THD main
V
L
Hy
C
R
V
O
S/N
R
IN
SCArej
V
IN
VO sub
Att HCC
HCC Output Attenuation
(1)
Att HCC
(2)
Power Supply Ripple Rejection
VCO Stopping Voltage
Channel Balance
Rr
V
CO stop
CH Ba
THD=1%, Rg=20kΩ
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
kΩ
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
V
CC
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
V
CC
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
L
OUT
R
OUT
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
stm32/stm8
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