AS321

Document number: DS36976 Rev. 3 - 2

1 of 10

www.diodes.com

March 2018

© Diodes Incorporated

AS321

LOW POWER SINGLE OPERATIONAL AMPLIFIER

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 SOT25 package.

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 VCC = 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



Lead-Free Packages: SOT25



Totally Lead-Free; RoHS Compliant (Notes 1 & 2)



Lead-Free Packa

ges, Available in “Green” Molding Compound:

SOT25



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

(Top View)

SOT25

Applications



Battery Charger



Active Filters



General Purpose Controllers, Instruments

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 Incorporate

d’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.

Typical Applications Circuit

Power Amplifier

DC Summing Amplifier

INPUT +

1

2

3

4

5

INPUT -

VEE

VCC

OUTPUT