DUAL EQ AMP WITH ALC
S1A0241A01
1
INTRODUCTION
The S1A0241A01 is a monolithic integrated clrcuit consisting of
a dual equalizer amplifier with ALC, and it is suitable for stereo
radio cassette-tape recorders.
FEATURES
Dual equalizer amplifier with built-in ALC circuit Low
noise; V
NI
= 1.0
V
(Typ)
High open loop voltage gain: 80dB (Typ)
Wide operating supply voltage range:
V
CC
= 4.5V
-
14V
Good ALC response balance between channels
Input coupling capacitor unnecessary
Diode or transistor for ALC unnecessary
Minimum number of external parts required
ORDERING INFORMATION]
BLOCK DIAGRAM
Device
Package
Operating Temperature
S1A0241A01-I0B0
9
-
SlP
-
20
C -- + 75
C
9
-
SIP
1
2
3
4
5
6
7
8
9
-
+
ALC
-
+
NF1
INPUT1
OUTPUT1
GND
V
CC
ALC
CONT
OUTPUT2
INPUT2
NF2
ALC
ALC
CONT
S1A0241A01
DUAL EQ AMP WITH ALC
2
ABSOLUTE MAXIMUM RATINGS (Ta = 25
C)
NOTE:
Derated above Ta = 25
C in the propotion of 5.5 mW/
C
ELECTRICAL CHARACTERISTICS
(Ta = 25
C, V
CC
= 7V, f = 1kHz, unless otherwise specified)
Characteristic
Symbol
Value
Unit
Supply Voltage
V
CC
16
V
Power Dissipation
P
D
(NOTE)
550
mW
Operating Temperature
T
OPR
-
20 -- +75
C
Storage Temperature
T
STG
-
20 -- +125
C
Characteristic
Symbol
Test Conditions
Min.
Typ. Max.
Unit
Quiescent Circuit Current
I
CCQ
V
I
= 0
1.5
3.5
4.5
mA
Open Loop Voltage Gain
G
VO
V
O
= 0.3V
70
80
-
dB
Closed Loop Voltage Gain
G
VC
V
O
= 0.3V
45
48
50
dB
Output Voltage
V
O
THD = 1%
0.6
1.2
-
V
Total Harmonic Distortion
THD
V
O
= 0.3V
-
0.1
0.3
%
Equivalent Input Noise Voltage
V
NI
R
G
=2.2k
, BW (
-
3dB)=20Hz
-
20kHz
-
1.0
2.0
V
Input Resistance
R
I
-
15
25
45
k
ALC Range
V
ALC
R
G
= 3.9k
, THD = 10%
40
45
-
dB
ALC Balance
CB
ALC
V
I
= 1mV
-
0
2.5
dB
DUAL EQ AMP WITH ALC
S1A0241A01
5
APPLICATION CIRCUIT
NOTE:ON playback, connect the time constant circuit as shown below, instead of R1 of Pins 1, 3 and R2 of
Pins 7, 9, which are used in the NAB.
1
2
3
4
5
6
7
8
9
ALC
CONT
-
+
-
+
ALC
+
+
+
+
+
+
+
+
18K
R1
100
39
3.9K
10
10
22
1M
330
10
3.9K
10
18K
R2
39
220
7V
Vcc
INPUT2
OUTPUT2
OUTPUT2
INPUT2
100
ALC
0.027
PIN 1,
4.3k
120k
PIN 3,
PIN 7
PIN 9