A Product Line of
Diodes Incorporated
AS324/324A
LOW POWER QUAD OPERATIONAL AMPLIFIERS
Description
The AS324/324A consist of four independent, high gain and internally
frequency compensated operational amplifiers. They are specifically
designed to operate from a single power supply. Operation from split
power supplies is also possible and the low power supply current
drain is independent of the magnitude of the power supply voltage.
Typical applications include transducer amplifiers, DC gain blocks and
most conventional operational amplifier circuits.
The AS324/324A series are compatible with industry standard 324.
The AS324A has more stringent input offset voltage than AS324.
The AS324 is available in SOIC-14, DIP-14 and TSSOP-14
packages, and the AS324A is available in SOIC-14 package.
Features
Internally Frequency Compensated for Unity Gain
Large Voltage Gain: 100dB (Typical)
Low Input Bias Current: 20nA (Typical)
Low Input Offset Voltage: 2mV (Typical)
Low Supply Current: 0.5mA (Typical)
Wide Power Supply Voltage Range:
Single Supply: 3V to 36V
Dual Supplies: ±1.5V to ±18V
Input Common Mode Voltage Range Includes Ground
Large Output Voltage Swing: 0V to V
CC
-1.5V
Power Drain Suitable for Battery Operation
Applications
Battery Charger
Cordless Telephone
Switching Power Supply
Pin Assignments
(Top View)
(Top View)
OUTPUT 1
INPUT 1-
INPUT 1+
V
CC
INPUT 2+
INPUT 2-
OUTPUT 2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUTPUT 4
INPUT 4-
INPUT 4+
GND
INPUT 3+
INPUT 3-
OUTPUT 3
OUTPUT 1
INPUT 1-
INPUT 1+
V
CC
INPUT 2+
INPUT 2-
OUTPUT 2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUTPUT 4
INPUT 4-
INPUT 4+
GND
INPUT 3+
INPUT 3-
OUTPUT 3
(SOIC-14/TSSOP-14 / M/G Package)
(DIP-14/ P Package)
AS324/324A
Document number: DS36827 Rev. 2 - 2
1 of 14
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January 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AS324/324A
Typical Applications Circuit
R1
Opto
Isolator
R6
V
CC
1/4
AS324/A
-
AC
Line
SMPS
+
GND
R7
Battery
Pack
R3
R4
R5
Current
R2
Sense
AZ431
V
CC
1/4
AS324/A
+
GND
-
R8
Battery Charger
R1 100k
+V
1
+
+V
2
R2 100k
R3 100k
+V
3
+V
4
R4 100k
R5
100k
1/4 AS324/A
-
R6 100k
V
IN(+)
R2 100k
R1 910k
V
O
R3 91k
-
1/4 AS324/A
+
V
CC
V
O
R
L
DC Summing Amplifier
Power Amplifier
AS324/324A
Document number: DS36827 Rev. 2 - 2
2 of 14
www.diodes.com
January 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AS324/324A
Typical Applications Circuit
(Cont.)
V
CC
R1 100k
R2 1M
+
2V
-
R3
2k
+
2V
-
R1
2k
R2
C1
0.1F
-
1/4 AS324/A
+
C
O
R
B
6.2k
R4 100k
V
CC
R5
100k
A
V
=1+R2/R1
V
O
R
L
10k
-
1/4 AS324/A
+
R4
3k
I1
1mA
I2
C
IN
AC
R3
1M
C2
10F
A
V
=11 (As shown)
Fixed Current Sources
AC Coupled Non-Inverting Amplifier
R1
1M
C1 0.01F
0.001F
R2 100k
-
1/4 AS324/A
+
R3 100k
V
CC
R5 100k
R4
100k
V
O
R1 16k
V
IN
R2 16k
+
C2
0.01F
1/4 AS324/A
-
R3
100k
V
O
V
O
0
f
O
R4
100k
f
O
=1kHz
Q=1
A
V
=2
Pulse Generator
DC Coupled Low-Pass RC Active Filter
AS324/324A
Document number: DS36827 Rev. 2 - 2
3 of 14
www.diodes.com
January 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AS324/324A
Functional Block Diagram
V
CC
6A
4A
100A
Q5
Q6
Q2
-
INPUTS
+
Q10
Q8
Q9
Q1
Q3
Q4
Rsc
OUTPUT
Cc
Q7
Q11
Q12
50A
Q13
Absolute Maximum Ratings
(Note 1)
Symbol
V
CC
V
ID
V
IN
Supply Voltage
Differential Input Voltage
Input Voltage
DIP-14
P
D
Total Power Dissipation (T
A
= +25
o
C)
SOIC-14
TSSOP-14
T
J
T
STG
T
LEAD
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 Seconds)
+150
-65 to +150
+260
Parameter
Rating
40
40
-0.3 to 40
1130
800
710
C
C
C
mW
Unit
V
V
V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Symbol
V
CC
T
A
Supply Voltage
Ambient Operating Temperature Range
Parameter
Min
3
-40
Max
36
+85
Unit
V
C
AS324/324A
Document number: DS36827 Rev. 2 - 2
4 of 14
www.diodes.com
January 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AS324/324A
Electrical Characteristics
(Limits in standard typeface are for T
A
= +25
o
C,
bold
typeface applies over T
A
= -40
o
C to +85
o
C (Note 2),
V
CC
= 5V, GND = 0V, unless otherwise specified.)
Symbol
Parameter
Conditions
AS324
Min
–
Typ
2
–
2
–
7
5
–
20
–
–
1.0
0.7
100
–
70
–
100
–
-120
40
–
15
–
50
40
–
–
28
–
5
–
24.78
36.78
Max
5
Unit
mV
V
IO
Input Offset Voltage
V
O
= 1.4V, R
S
= 0Ω,
V
CC
= 5V to 30V
AS324 A
–
–
–
–
–
7
3
mV
5
–
30
nA
100
100
nA
200
V
CC
-
1.5
3
mA
1.2
–
–
–
–
–
–
–
dB
dB
mA
dB
dB
V
µV/
o
C
∆V
IO
/∆T
I
IO
Average Temperature Coefficient of Input
Offset Voltage
Input Offset Current
T
A
= -40 to +85
o
C
I
IN
+ - I
IN
-, V
CM
= 0V
–
–
I
BIAS
V
IR
I
CC
Input Bias Current
Input Common Mode Voltage Range (Note 3)
Supply Current
I
IN
+ or I
IN
-, V
CM
= 0V
V
CC
= 30V
T
A
= -40 to +85
o
C,
R
L
= ∞
V
CC
= 30V
V
CC
= 5V
–
0
–
–
85
80
60
G
V
Large Signal Voltage Gain
V
CC
= 15V, R
L
≥ 2kΩ, V
O
= 1V to 11V
CMRR
Common Mode Rejection Ratio
DC, V
CM
= 0 to (V
CC
-1.5)V
60
70
PSRR
CS
I
SOURCE
Power Supply Rejection Ratio
Channel Separation
Source
Output Current
V
CC
= 5 to 30V
f = 1kHz to 20kHz
V
IN
+ = 1V, V
IN
- = 0V, V
CC
= 15V, V
O
=
2V
V
IN
+ = 0V, V
IN
- = 1V, V
CC
= 15V, V
O
=
2V
V
IN
+ = 0V, V
IN
- = 1V, V
CC
= 15V, V
O
=
0.2V
60
–
20
20
10
5
12
–
26
26
27
27
–
–
–
–
–
–
–
–
60
–
–
–
–
20
mA
µA
mA
I
SINK
Sink
I
SC
Output Short Circuit Current to Ground
V
CC
= 15V
V
CC
= 30V, R
L
= 2kΩ
V
OH
Output Voltage Swing
V
CC
= 30V, R
L
= 10kΩ
V
V
OL
V
CC
= 5V, R
L
= 10kΩ
DIP-14
Thermal Resistance (Junction to Case)
SOIC-14
2. Limits over the full temperature are guaranteed by design, but not tested in production.
mV
30
–
–
o
θ
JC
Notes:
C/W
3. The input common-mode voltage of either input signal voltage should not be allowed to go negatively by more than 0.3V (at +25
o
C). The upper end of the
common-mode voltage range is V
CC
-1.5V (at +25
o
C), but either or both inputs can go to +36V without damages, independent of the magnitude of the
V
CC
。
AS324/324A
Document number: DS36827 Rev. 2 - 2
5 of 14
www.diodes.com
January 2014
© Diodes Incorporated
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