Diodes AS321 User Manual
AS321
Document number: DS36976 Rev. 2 - 2
1 of 10
www.diodes.com
February 2014
© Diodes Incorporated
AS321
A Product Line of
Diodes Incorporated
Description
The AS321 is a high gain and internally frequency compensated
operational amplifier specifically designed to operate from a single
power supply. Operation from split power supply is also possible and
the low power supply current drain is independent of the magnitude of
the power supply voltages. Typical applications include battery
charger, active filters, general purpose controllers and most
conventional operational amplifier circuits.
The AS321 is compatible with industry standard 321.
The AS321 is available in SOT-23-5 packages.
Features
Excellent Phase Margin: 60 deg.
Large Voltage Gain: 100dB (Typical)
Low Input Bias Current: 20nA (Typical)
Low Input Offset Voltage: 2mV (Typical)
Low Supply Current: 0.35mA at V
CC
= 5V
Wide Power Supply Voltage:
Single Supply: 3V to 36V
Dual Supplies: ±1.5V to ±18V
Wide Input Common Mode Voltage Range: 0V to VCC-1.5V
Pin Assignments
(Top View)
(SOT-23-5/ K Package)
Applications
Battery Charger
Active Filters
General Purpose Controllers, Instruments
INPUT +
1
2
3
4
5
INPUT -
V
EE
V
CC
OUTPUT
LOW POWER SINGLE OPERATIONAL AMPLIFIER
Typical Applications Circuit
Power Amplifier DC Summing Amplifier
AS321
Document number: DS36976 Rev. 2 - 2
2 of 10
www.diodes.com
February 2014
© Diodes Incorporated
AS321
A Product Line of
Diodes Incorporated
Typical Applications Circuit (Cont.)
AC Coupled Non-Inverting Amplifier Fixed Current Sources
Pulse Generator DC Coupled Low-Pass Active Filter
AS321
Document number: DS36976 Rev. 2 - 2
3 of 10
www.diodes.com
February 2014
© Diodes Incorporated
AS321
A Product Line of
Diodes Incorporated
Symbol
Parameter
Rating
Unit
VS (VCC-VEE)
Power Supply Voltage
40
V
V
ID
Differential Input Voltage
40
V
V
IN
Input Voltage
-0.3 to 40
V
θ
JA
Thermal Resistance to Ambient
260
C/W
TJ
Operating Junction Temperature
+150
C
T
STG
Storage Temperature Range
-65 to +150
C
T
LEAD
Lead Temperature (Soldering, 10 Seconds)
+260
C
Symbol
Parameter
Min
Max
Unit
V
CC
Supply Voltage
3
36
V
T
A
Ambient Operating Temperature Range
-40
+85
C
Functional Block Diagram
Absolute Maximum Ratings (Note 1)
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
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