UTC KA22241
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R110-001,A
DUAL EQUALIZER AMPLIFIER WITH
ALC
DESCRIPTION
The UTC KA22241 is a monolithic integrated circuit,
consisting of 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(Typical)
*High open loop voltage gain: Gv=80dB(Typical)
*Good ALC response balance between channels
*Not necessary the input coupling capacitor
*Not necessary the diode or transistor for ALC
*Built in power supply muting circuit
*Minimum number of external parts required
SIP-9
BLOCK DIAGRAM
1
2
3
4
5
6
7
8
9
ALC
channel 1
channel 2
NF1
IN1
OUT1
GND
ALC
mute
Vcc
IN2
NF2
OUT2
ABSOLUTE MAXIMUM RATING
(Ta=25
C)
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
VCC
16
V
Operating Temperature
TOPR
-20 to 75
C
Storage Temperature
TSTG
-20 to 125
C
Power Dissipation
PD
550
mW
UTC KA22241
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R110-001,A
ELECTRICAL CHARACTERISTICS
(Ta=25
C, V
CC
=7V, f=1KHZ, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Quiescent Circuit Current
ICCQ
VI=0
1.5
3.5
4.5
mA
Open Loop Voltage Gain
GVO
VO=0.3V
70
80
dB
Closed Loop Voltage
Game
GVC
VO=0.3V
45
48
50
dB
Output Voltage
VO
THD=1%
0.6
1.2
V
Total Harmonic Distortion
THD
VO=0.3V
0.1
0.3
%
Input Noise Voltage
VNI
RO=2.2K
BW(-3dB)=20HZ
20KHZ
1.0
2.0
V
Input Resistance
RI
15
25
45
k
ALC Range
VALC
RO=3.9K
,THD=10%
40
45
dB
ALC Balance
CBALC
VI=1mV
0
2.5
dB
TEST CIRCUIT
~
~
1
2
3
4
5
6
7
8
9
0.027
F
4.3k
120k
15k
39
100
F
10
F
SW 3
SW 1
SW 2
SW 4
SW 5
SW 6
SW 7
SW 8
SW 9
SW 10
SW 11
10k
2.2k
3.9k
1M
2.2
F
220
330
F
3.9k
2.2k
10k
10
F
120k
4.3k
15k
39
100
F
0.027
F
A
C
D
B
Vcc
UTC KA22241
UTC KA22241
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R110-001,A
TEST METHOD
SYMBOL
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
SW10
SW11
I
CCQ
ON
OFF
1
ON
3
ON
ON
3
1
OFF
ON
G
VO
ON
OFF
1
ON
1
ON
ON
3
1
OFF
ON
G
VC
OFF
ON
1
ON
1
ON
ON
3
1
OFF
ON
THD
OFF
ON
1
ON
1
ON
ON
3
1
OFF
ON
V
O
OFF
ON
1
ON
1
ON
ON
3
1
OFF
ON
V
NI-1
OFF
ON
1
ON
2
ON
ON
3
1
OFF
ON
V
NI-2
ON
OFF
1
ON
3
ON
ON
2
1
ON
OFF
V
ALC
OFF
OFF
2
OFF
1
OFF
ON
3
1
OFF
ON
CB
ALC
OFF
OFF
2
OFF
1
OFF
OFF
1
2
OFF
ON
APPLICATION CIRCUIT
1
2
3
4
5
6
7
8
9
ALC
channel 1
channel 2
mute
R1
15k
39
3.9k
100
F
10
F
10
F
22
F
1M
330
F
10
F
10
F
3.9k
100
F
220
R1
15k
39
Vcc=7V
Note: On playback, connect the time constant circuit as follows below, instead of R1, R2 of PINS 1-3, 7-9,
which are used in the NAB.
4.3k
120k
0.027
F
PIN1-3
PIN7-9
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