FM NOISE CANCELLER
S1A2272A01
1
INTRODUCTION
The S1A2272A01 is a monolithic integrated circuit for the FM
noise canceller used in car stereos.
It is used in combination with a PLL FM multiplex demodulator
with a pilot signal canceller.
FEATURES
Operation voltage range: V
CC
= 8V
-
15V
Low quiescent circuit current
Low distortion: THD = 0.02% at V
I
= 300mV
Pilot signal compensation
Built-in monostable multivibrator.
Variable input type noise AGC system.
ORDERING INFORMATION
BLOCK DIAGRAM
Device
Package
Operating Temperature
S1A2272A01-S0B0
16-SOP-225A
-
20
C
-
+75
C
16
-
SOP
-
225A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GATE
INVERSION
AMP
MULTI
VIBRATOR
NOISE DETECTOR
HP AMP
SUB AMP
LP AMP
BUFFER
Vcc
OUTPUT
SUB IN
LPO
LPI
BC
INPUT
GND
SUB IN(-)
PLT CAN
SIGNAL
PW ADJ
NOISE
AGC ADJ
NOISE
DET ADJ
BYPASS
HPO
HPI
S1A2272A01
FM NOISE CANCELLER
2
ABSOLUTE MAXIMUM RATINGS (Ta = 25
C)
ELECTRICAL CHARACTERISTICS
(Ta = 25
C, V
CC
= 12V, 300 mV, f = 1kHz, unless otherwise specified)
Characteristic
Symbol
Value
Unit
Supply Voltage
V
CC
16
V
Power Dissipation
PD
300
Min
Operating Temperature
T
OPR
-
20
-
+ 75
C
Storage Temperature
T
STG
-
40
-
+ 125
C
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Input Pin
Output Pin
Quiescent Circuit Current
I
CCQ
-
-
-
16
25
mA
Voltage Gain
G
V
V
7
= 300 mV, f = 1kHz
Output
-0.2
0.8
1.8
dB
Output Voltage
V
O
V
7
= variable, f = 1kHz
Output
THD = 1%
1.3
-
-
V
Total Harmonic Distortion
THD
V
7
= 300mV, f = 1kHz
Output
0.01
0.03
K%
Input Resistance
R
I
V
7
= 300mV, f = 1kHz
-
36
51
67
dB
Low pass AMP Gain
G
V (LP)
V
5
= 300mV, f = 1kHz
V
4
0
0.83
1.58
dB
High pass AMP Gain
A
VH
V
9
= 100mV
f = 200kHz
V
10
1.58
2.92
4.35
V
Inverted Amp Distortion
THD
f = 19kHZ
Output
300
-
0.1
%
Inverted Amp Dynamic
Range
V
O
V
15
= 100mV
f = 19kHz
Output
THD = 1%
-
-
-
mV
Inverted Amp Gain
G
V
V
15
= 100mV
f = 19kHz
Output
0
2.28
4.08
dB
Output Noise Voltage
V
NO
Bypass V
7
V
15
to GND
Output,
100 kHz LPF
-
30
60
V
Gate Time
t
G
V
O
= 100mV
p-p
, 1
s,
f = 1kHz
Output
13
21
30
sec
Noise Sensitivity
SN
V
7
, 1
s, f = 1kHz
Output
-
-
30
mV
p-0
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