CONTEK KA22241 Datasheet
KA22241 LINEAR INTEGRATED CIRCUIT
DUAL EQUALIZER AMPLIFIER WITH
ALC
DESCRIPTION
The Contek 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
*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
NI=1.0mV(Typical)
SIP-9
Contek
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
Contek Microelectronics Co.,Ltd.
1
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
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=2.2KW
Input Resistance RI 15 25 45 kW
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 mV
BW(-3dB)=20HZ 20KHZ
VAL C
RO=3.9KW,THD=10% 40 45 dB
Contek KA22241
SW 1
CONTEK
123456 7
W
220
W
1M
SW 6
SW 8
330 mF
120kW
SW 9
SW 7
3.9kW
10 mF
2.2kW
B
10kW
0.027 mF
SW 2
4.3kW 120kW
15kW
39W
A
100 mF
SW 3
10 mF
10kW
2.2 mF
SW 4
3.9kW
C D
SW 5
2.2kW
~ ~
Vcc
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:sales@contek-ic.com
8
0.027 mF
100 mF
SW 10
W
4.3k
15kW
W
39
9
SW 11
2
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