UTC KA22241 LINEAR INTEGRATED CIRCUIT
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 VNI=1.0µV(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
BLOCK DIAGRAM
SIP-9
channel 1 channel 2
mute
ALC
1 2 3 4 5 6 7 8 9
NF1 IN1 OUT1 GND ALC
Vcc IN2
OUT2
NF2
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 UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-001,A
1
UTC KA22241 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Ta=25°C, VCC=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
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=2.2KΩ
Input Resistance RI 15 25 45 kΩ
ALC Range
ALC Balance CBALC VI=1mV 0 2.5 dB
TEST CIRCUIT
GVC VO=0.3V 45 48 50 dB
1.0 2.0 µV
BW(-3dB)=20HZ¡ª20KHZ
¦¤VALC
RO=3.9KΩ,THD=10% 40 45 dB
UTC KA22241
SW 1
1 2 3 4 5 6 7
Ω
3.9k
F
µ
330
SW 7
Ω
2.2k
0.027 µF
SW 2
4.3kΩ120k
15k
Ω
39
Ω
100 µF
Ω
SW 3
10 µF
A
10k
F
µ
2.2
SW 4
3.9k
Ω
C D
SW 5
Ω
2.2k
Ω
~ ~
Ω
220
Ω
1M
SW 6
SW 8
SW 9
10k
10 µF
Ω
120k
B
8
0.027 µF
Ω
100 µF
SW 10
4.3k
15k
39
Vcc
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-001,A
9
Ω
Ω
Ω
SW 11
2
UTC KA22241 LINEAR INTEGRATED CIRCUIT
TEST METHOD
SYMBOL SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 SW10 SW11
ICCQ ON OFF 1 ON 3 ON ON 3 1 OFF ON
GVO ON OFF 1 ON 1 ON ON 3 1 OFF ON
GVC OFF ON 1 ON 1 ON ON 3 1 OFF ON
THD OFF ON 1 ON 1 ON ON 3 1 OFF ON
VO OFF ON 1 ON 1 ON ON 3 1 OFF ON
VNI-1 OFF ON 1 ON 2 ON ON 3 1 OFF ON
VNI-2 ON OFF 1 ON 3 ON ON 2 1 ON OFF
VALC OFF OFF 2 OFF 1 OFF ON 3 1 OFF ON
CBALC OFF OFF 2 OFF 1 OFF OFF 1 2 OFF ON
APPLICATION CIRCUIT
channel 1 channel 2
1 2 3 4 5 6 7 8 9
R1
15kΩ
39Ω
3.9kΩ
10 µF
10 µF
100 µF
mute
ALC
Vcc=7V
220Ω
10 µF
3.9kΩ
R1
15kΩ
39Ω
100 µF
330 µF
10 µF
1MΩ
22 µF
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.
120k
Ω
PIN1-3 PIN7-9
4.3k
Ω
0.027µF
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R110-001,A
3
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