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 SO-14 and TSSOP-14 packages, and the
AS324A is available in SO-14 package.
Pin Assignments
(Top View)
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
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
SO-14/TSSOP-14
Applications
Battery Charger
Cordless Telephone
Switching Power Supply
Input Common Mode Voltage Range Includes Ground
Large Output Voltage Swing: 0V to V
CC
-1.5V
Power Drain Suitable for Battery Operation
Lead-Free Packages: SO-14, TSSOP-14
Totally Lead-Free; RoHS Compliant (Notes 1 & 2)
Lead-Free Packages, Available in “Green” Molding Compound:
SO-14, TSSOP-14
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AS324/324A
Document number: DS36827 Rev. 3 - 2
1 of 14
www.diodes.com
May 2018
© 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 4)
Symbol
V
CC
V
ID
V
IN
Supply Voltage
Differential Input Voltage
Input Voltage
SO-14
P
D
Total Power Dissipation (T
A
= +25°
C)
TSSOP-14
T
J
T
STG
T
LEAD
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 Seconds)
+150
-65 to +150
+260
710
°
C
°
C
°
C
Parameter
Rating
40
40
-0.3 to 40
800
mW
Unit
V
V
V
Note 4: 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. 3 - 2
4 of 14
www.diodes.com
May 2018
© Diodes Incorporated
AS324/324A
Electrical Characteristics
(Limits in standard typeface are for T
A
= +25°
bold
typeface applies over T
A
= -40° to +85° (Note 5),
C,
C
C
V
CC
= 5V, GND = 0V, unless otherwise specified.)
Symbol
Parameter
Conditions
AS324
V
IO
Input Offset Voltage
V
O
= 1.4V, R
S
= 0Ω,
V
CC
= 5V to 30V
AS324A
∆V
IO
/∆T
I
IO
Average Temperature Coefficient of Input
Offset Voltage
Input Offset Current
T
A
= -40 to +85°
C
I
IN
+ - I
IN
-, V
CM
= 0V
Min
—
—
—
—
—
—
—
—
I
IN
+ or I
IN
-, V
CM
= 0V
V
CC
= 30V
T
A
= -40 to +85°
C,
R
L
= ∞
V
CC
= 30V
V
CC
= 5V
—
0
—
—
85
80
60
CMRR
Common Mode Rejection Ratio
DC, V
CM
= 0 to (V
CC
-1.5)V
60
70
PSRR
CS
I
SOURCE
Output Current
I
SINK
Sink
Power Supply Rejection Ratio
Channel Separation
Source
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
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
60
—
20
20
10
5
12
—
26
26
27
27
—
—
—
Typ
2
—
2
—
7
5
—
20
—
—
1.0
0.7
100
—
70
—
100
—
-120
40
—
15
—
50
40
—
—
28
—
5
—
18
20
91
133
Max
5
7
3
5
—
30
100
100
200
V
CC
-
1.5
3
mA
1.2
—
—
—
—
—
—
—
—
—
—
—
—
60
—
—
—
—
20
30
—
mV
V
mA
µA
mA
mA
dB
dB
nA
V
nA
mV
µV/°
C
mV
Unit
I
BIAS
V
IR
I
CC
Input Bias Current
Input Common Mode Voltage Range (Note 6)
Supply Current
G
V
Large Signal Voltage Gain
V
CC
= 15V, R
L
≥ 2kΩ, V
O
= 1V to 11V
dB
dB
V
OL
V
CC
= 5V, R
L
= 10kΩ
SO-14
Thermal Resistance (Junction to Case)
TSSOP-14
SO-14
Thermal Resistance (Junction to Ambient)
TSSOP-14
5. Limits over the full temperature are guaranteed by design, but not tested in production.
θ
JC
°
C/W
θ
JA
Notes:
—
—
°
C/W
6. The input common-mode voltage of either input signal voltage should not be allowed to go negatively by more than 0.3V (at +25° The upper end of the
C).
common-mode voltage range is V
CC
-1.5V (at +25° but either or both inputs can go to +36V without damages, independent of the magnitude of the
C),
V
CC
.
AS324/324A
Document number: DS36827 Rev. 3 - 2
5 of 14
www.diodes.com
May 2018
© Diodes Incorporated
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