Page 1 of 6
JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO.,LTD.
CJ4558CP--DUAL OPERATONAL AMPLIFIER
1. Overview
The CJ4558CP is a dual operational amplifier designed for use as ripple filter, compensation
amplifier, audio pre-amplifier and linear amplifier in electronic devices. Its features are:
Built-in phase compensation circuit
Low noise: V
NI
= 2.5uV
Wide bandwidth and high speed, BW = 3MHz
SOP-8
2. Block Diagram and Pin Description
2. 1 Block Diagram
2. 2
Pin Description
Pin No.
Symbol
Description
Pin No.
Symbol
Description
1
OUT
1
Output 1
5
IN
2+
Positive Input 2
2
IN
1
-
Negative Feedback1
6
IN
2-
Negative Input 2
3
IN
1
+
Positive Input 1
7
OUT
2
Output 2
4
V
EE
V
EE
8
V
CC
V
CC
JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO.,LTD.
Add:275 Binjiang Rd.(M),Jiangyin,China Tel: (0510) 6852812 Fax: (0510) 6858792
1
2
3
4
5
6
7
8
A 1
A 2
CHANGJIANG ELEC. CO.
CJ4558CP
Page 2 of 6
3. Electrical Characteristics
3. 1 Absolute Maximum Ratings
Unless otherwise specified, T
amb
= 25
Parameter
Symbol
Value
Unit
Supply Voltage
V
CC
/V
EE
18
V
Input Differential Voltage
V
ID
30
V
Input Common-mode Voltage
V
IC
15
V
Power Dissipation
P
D
500
mW
Operating Temperature
T
amb
-30~75
Storage Temperature
T
stg
-55~125
3. 2 Electrical Characteristics
Unless otherwise specified, T
amb
= 25
V
CC
= 15V V
EE
= -15V
Value
Parameter
Symbol Test Conditions
Min
Typ
Max
Unit
Figs
Supply Current
I
CC
/I
EE
4.0
6.0
mA
4.5
Input Offset Current
I
IO
5
200
nA
4.2
Input Bias Current
I
IB
60
500
nA
4.2
Input Common-mode
Voltage
V
IC
12
14
V
4.3
R
L
10k
12
14
V
4.4
Max. Output Voltage
V
OM
R
L
2k
10
13
V
4.4
Output Shot Current
I
OS
40
mA
4.4
Output Sink Current
I
Osink
40
mA
4.4
Open Loop Voltage
Gain
A
VO
V
O
= 10V
R
L
2k
86
100
dB
4.7
Common-mode
Rejection Ratio
CMRR R
S
10k
70
90
dB
4.3
Supply Voltage
Rejection Ratio
K
SVR
R
S
10k
30
150 uV/V
4.1
Input Offset Voltage
V
IO
R
S
10k
0.5
6
mV
4.1
Slew Rate
S
R
A
V
=1
R
L
2k
1.0
V/uS
4.6
Bandwidth
BW
3.0
MHz
4.7
Equivalent Input
Noise Voltage
V
NI
R
S
=1k
f=30Hz~30kHz
2.5
uV
4. Test Circuit
V
IO
V
IO
=V
O
/ 100 (V)
K
SVR
K
SVR
= (V
IO1
-V
IO2
) /5 (uV/V)
V
IO1
V
CC
=17.5V V
EE
= -17.5V
V
IO2
V
CC
=12.5V V
EE
= -12.5V
Fig 4.1
10k
1M
10k
V
Vcc
V
Vo
A
EE
CHANGJIANG ELEC. CO.
CJ4558CP
Page 3 of 6
I
IO
I
IO
=I
I
(+)-I
I
(-)
Fig 4.2
V
IC
V
2
is adjustable voltage V
O
= 1V
K
CMR
Differential Voltage Gain to Common-mode
Voltage Gain Ratio
Fig 4.3
Fig 4.4
Fig 4.5 Fig 4.6
1M
V
V
Vo
10k
10k
1M
V
V2
A
Vcc
EE
A
A
V
V
EE
Icc
I
EE
A
C C
V
OM 1+
S1=B S2 OFF, S3 OFF
V
OM 1-
S1=A S2 OFF, S3 OFF
V
OM 2+
S1=B S2 ON, S3 OFF
V
OM 2-
S1=A S2 OFF, S3 ON
Iosink
S1=A S2 OFF, S3 ON
Ios
S1=B S2 OFF, S3 ON
A
A
A
Vcc
V
EE
V
EE
V
C C
Vo
A
R
L
V
V
Vo
RL
A
Vcc/2
A
B
S1
S2
S3
A
Vcc
A
EE
Ios
Iosink
CHANGJIANG ELEC. CO.
CJ4558CP
Page 4 of 6
Fig 4.7
5. Characteristics Curve
2k
2k
2k
V
C C
C1
C2
C1
G
V
R
R
Vo
I
+
+
A
V
EE
A
VD
=20log(V
O
/V)
BW is the frequency of V
I
when V
O
=V
I
30
40
50
60
70
80
20
0
20
40 60
80 100
V+ =15V
V- =15V
I Tamb
Ambient Temperature Tamb ()
Input Bias Current I (nA)
IB
IB
1
10 100 1k 10k 100k 1M 10M
0
20
40
60
80
100
120
V+=15V
R =2k
V- =15V
Tamb=25
Frequency fHz
Open Loop Voltage Gain
Avof
6
8
10 12 14 16 18
15
10
5
0
5
10
15
Supply Voltage V+ V-V
Max. Output Voltage V
V
V V+ V-
OM
OM
1
10
100
1k 10k 100k 1M
0
8
16
24
Vo (pp) - f
Frequency f (Hz)
Max. Output Peak Voltagae
V+=15V
V =15V
Tamb=25
_
0.1
0.3
1.0
3.0
10.0
12
16
20
24
28
Vo (pp) - RL
Load Resistance R (k
)
Output Peak Voltage Vo(pp) (V)
V+=15V
V = 15V
Tamb=25
Ambient Temperature Tamb
Power Dissipation P
W
Avo
dB
Vo (pp)
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