LM321 Low Power Single Op Amp
April 2001
LM321
Low Power Single Op Amp
General Description
The LM321 brings performance and economy to low power
systems. With a high unity gain frequency and a guaranteed
0.4V/µs slew rate, the quiescent current is only
430µA/amplifier (5V). The input common mode range in-
cludes ground and therefore the device is able to operate in
single supply applications as well as in dual supply applica-
tions. It is also capable of comfortably driving large capaci-
tive loads.
The LM321 is available in the SOT23-5 package. Overall the
LM321 is a low power, wide supply range performance op
amp that can be designed into a wide range of applications
at an economical price without sacrificing valuable board
space.
Features
(V
CC
= 5V, T
A
= 25˚C. Typical values unless specified).
n
Gain-Bandwidth product
1MHz
n
Low supply current
430µA
n
Low input bias current
45nA
n
Wide supply voltage range
+3V to +32V
n
Stable with high capacitive loads
n
Single version of LM324
Applications
n
n
n
n
n
Chargers
Power supplies
Industrial: controls, instruments
Desktops
Communications infrastructure
Connection Diagram
SOT23-5
Application Circuit
DC Summing Amplifier
(V
IN’s
≥
0 V
DC
and V
O
≥
V
DC
)
20007601
Top View
20007607
Where: V
0
= V
1
+ V
2
- V
3
- V
4
, (V
1
+ V
2
)
≥
(V
3
+ V
4
) to keep V
O
>
0 V
DC
Ordering Information
Package
5-Pin SOT-23
Part Number
LM321MF
LM321MFX
Package Marking
A63A
Transport Media
1k Units Tape and Reel
3k Units Tape and Reel
NSC Drawing
MF05A
© 2001 National Semiconductor Corporation
DS200076
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