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
* Power supply ripple rejection
* Wide operating voltage range
ZIP-16
APPLICATIONS
* FM stereo receivers
ORDERING INFORMATION
Device
SA3375
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
Symbol
V
CCmax
I
Lmax
P
dmax
T
opr
T
stg
Ratings
16
40
520
-20~+70
-40~+125
Unit
V
mA
mW
°C
°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 T
amb
=25°C, V
CC
=10V, V
IN
=300mV, f=1 kHz, L+R=90%, pilot=10%,
R
g
=20kΩ see specified test circuit.)
Characteristics
Recommended Supply Voltage
Input Signal Voltage
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
HCC Output Attenuation
Power Supply Ripple Rejection
VCO Stopping Voltage
Channel Balance
Pilot Cancellation Factor
Symbol
V
CC
V
I
I
CCO
Sep
ST THD
V
L
Hy
CR
VO
S/N
r
i
SCArej
v
i
Att SNC
V
O sub
THD=1%, R
g
=20kΩ
THD=1%, R
g
=10kΩ
V8=0.6V, L-R=90%, pilot=10%
V8=0.1V, L-R=90%, pilot=10%
Pilot=30mV
Sub
R
g
=20kΩ
R
g
=10 kΩ
SW1: B
main
L+R=90%, pilot=10%
Mono THD mono=300mV
Test condition
Min.
6.5
200
--
40
--
--
60
--
--
150
68
70
--
--
700
--
-8.5
--
-15.0
-2.0
--
--
--
20
22
50
0.05
0.05
85
3
±3
215
74
78
20
80
900
450
-3.0
--
-9.0
--
35
7.3
0.5
25
Typ.
Max.
14
300
28
--
0.2
0.2
120
6
--
300
--
--
--
--
--
--
-0.3
5
-0.5
0
--
--
1.5
--
Unit
V
mV
mA
dB
%
%
mV
dB
%
mV
dB
dB
kΩ
dB
mV
mV
dB
mV
dB
dB
dB
V
dB
dB
Att HCC (1) V7=0.6V, L+R=90%, pilot=10%
Att HCC (2) V7=1V, L+R=90%, pilot=10%
Rr
V
CO stop
CH Ba
CLp
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.
1
2
3
4
5
6
7
8
9
10
11, 12
13
14, 15
16
Pin name
V
CC
IN
SEP Adj
HC constant
L
OUT
R
OUT
HCC
SNC
GND
STLED
FILTER1
CLP
FILTER2
OSC
Power supply.
Composite input
Connected to semi-fixed resister
Connecter to capacitor
Out of L channel
Out of R channel
High –cut control
Stereo noise control
Ground
Stereo lamp
Filter of pilot detector
Pilot cancel adjust
Filter of phase comparator
VCO OSC
Description
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)
work in monaural mode.
VCO will be stopped and SA3375 will
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.0
2005.02.03
Page 3 of 5
SA3375
TEST CIRVUIT
SA3375
HC
constant
SEP adj
STLED
ROUT
Filter1
Filter1
Filter2
Filter2
15
1
0.022
3.3
1k
100K
12k
1000p
10k
LOUT
GND
HCC
OSC
16
SNC
CLP
13
V
CC
1
+V
CC
100
Separation
adjust
A
SW1
B
Rg
IN
2
3
2.2k
4
5
6
7
SW2
8
9
10
11
1
12
14
1K
4.7
Composite input
1500p
LOUT
0.015
3.3k
3.3k
0.6V
0.1V
3.0V
A B
V
R
0.047
100
A B
C
1K
+V
CC
3300p Pilot cancel asjust
ROUT
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
UNIT: mm
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.0
2005.02.03
Page 5 of 5
国产芯片交流
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
