5 BAND DUAL GRAPHIC EQ AMP S1A0234B01
INTRODUCTION
The S1A0234B01 is a monolithic integrated circuit developed
for the tereo 5 band graphic equalizer amplifier.
It consists of an operational amplifier, and four resonant circuits
with an active filter. It is suitable for radio cassette-tape recorders, car stereos or music centers.
24−SZIP−275
FEATURES
• Tone control with independent adjustment of each band through
external capacitor
• Gain control through external variable resistor (Gain = ±11dB)
• Excellent cross talk characteristics (CT = 70dB Typ, at RG = 0)
• Wide operating supply voltage range: V
= 3.5V — 14V
CC
ORDERING INFORMATION
Device Package Operating Temperature
S1A0234B01-Y0B0 24−SZlP−275 −20°C — + 70°C
BLOCK DIAGRAM
BASE1 NF2 BASE2 NF3 BASE3 NF4 BASE4
NF1
2 4 6 8 10 12 14 16 18 20 22 24
BUFFER
OUT
OUT2 IN2 GND
BIAS
1 3 5 7 9 11
NF1 BASE1 NF2 BASE2 NF3 BASE3 NF4 BASE4 OUT1 BUFFER
13
15 17 19 21 23
OUT
IN1
GND
1
S1A0234B01 5 BAND DUAL GRAPHIC EQ AMP
ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)
Characteristic Symbol Value Unit
Supply Voltage V
Power Dissipation P
Operating Temperature T
Storage Temperature T
CC
D
OPR
STG
15 V
500 mW
−20 — + 70 °C
−40 — + 125 °C
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, VCC = 8V, RL= 20K, Flat Mode, unless otherwise specified)
Characteristic Symbol
Quiescent Circuit Current I
Output Voltage V
CCQ
O
Total Harmonic Distortion THD 1 K − − 0.1 0.3 %
Channel Balance CB 1 K − −1.0 0 1.0 dB
Cross Talk CT 1 K − 50 70 − dB
Output Noise Voltage V
NO
Test Conditions
Min. Typ. Max. Unit
f(Hz) Conditions
VI = 0 4.0 7.0 10.0 mA
1 K THD = 1% 500 600 − mV
Flat, RG = 2.2K
BW(-3 dB) = 10Hz − 30kHz
− 10 20 µV
Flat GV (Flat) 1 K VI = 100mV −2.0 −1.5 1.0 dB
100
300
Boost GV (Boost) 1 K VI = 100mV 9.0 11.0 14.0 dB
3 K
Voltage Gain 10 K
100
300
Cut GV (Cut) 1 K VI = 100mV −14.0 −11.0 −9.0 dB
3 K
10 K
2
5 BAND DUAL GRAPHIC EQ AMP S1A0234B01
TEST CIRCUIT
0.022µF
1k
100Hz 300Hz 1kHz 3kHz
50k
Ω
50k
Ω
50k
Ω
50k
Ω
Ω
10kHz
Ω
50k
1µF
0.033µF
6 82 4
0.33µF
0.01µF
0.1µF
10
0.0033µF
0.033µF
0.001µF
S1A0234B01
1 3 5 7 13
0.033µF
1µF
50k
100Hz 300Hz 1kHz 3kHz
0.01µF
0.33µF
Ω
50k
Ω
0.0033µF
0.1µF
50k
Ω
159 11
0.001µF
0.033µF
17
4.7µF
4.7µF
50k
Ω
2218 2014 1612
2119
50k
Ω
10kHz
1k
Ω
0.022µF
24
23
220µF
4.7µF
4.7µF
OUT2
IN2
µ
µ
OUT1
3
S1A0234B01 5 BAND DUAL GRAPHIC EQ AMP
4
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