NATIONAL SEMICONDUCTOR LM7321 User Guide and Manual
Summary
These high-performance rail-to-rail operational amplifiers are designed for demanding industrial, automotive, and communication applications. Offering a wide voltage range (2.5V to 32V) and robust current capability, they ensure reliable signaling even with capacitive loads or extreme temperature fluctuations (-40°C to 125°C). The provided manual covers comprehensive electrical specifications, including detailed performance metrics like common-mode rejection ratio and output swing, guiding users in integrating these precision components into high-reliability electronic designs.
Page 1 Text Content
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September 5, 2008
LM7321 Single/ LM7322 Dual Rail-to-Rail Input/Output ±15V, High Output Current and Unlimited Capacitive Load Operational Amplifier General Description Features The LM7321/LM7322 are rail-to-rail input and output ampli- (VS = ±15, TA = 25°C, Typical values unless specified.) fiers with wide operating voltages and high output currents. Wide supply voltage range 2.5V to 32V The LM7321/LM7322 are efficient, achieving 18 V/µs slew
Output current +65 m A/−100 m A
rate and 20 MHz unity gain bandwidth while requiring only 1
Gain bandwidth product 20 MHz
m A of supply current per op amp. The LM7321/LM7322 per-
Slew rate 18 V/µs
formance is fully specified for operation at 2.7V, ±5V and
Capacitive load tolerance Unlimited
Input common mode voltage 0.3V beyond rails
The LM7321/LM7322 are designed to drive unlimited capac-
Input voltage noise 15 n V/√Hz
itive loads without oscillations. All LM7321 and LM7322 parts
Input current noise 1.3 p A/√Hz
are tested at −40°C, 125°C, and 25°C, with modern automatic
Supply current/channel 1.1 m A
test equipment. High performance from −40°C to 125°C, de-
tailed specifications, and extensive testing makes them suit- Distortion THD+Noise −86 d B able for industrial, automotive, and communications applica- Temperature range −40°C to 125°C
tions. Tested at −40°C, 25°C and 125°C at 2.7V, ±5V, ±15V. Greater than rail-to-rail input common mode voltage range with 50 d B of common mode rejection across this wide voltage Applications range, allows both high side and low side sensing. Most de-
Driving MOSFETs and power transistors
vice parameters are insensitive to power supply voltage, and
Capacitive proximity sensors
this makes the parts easier to use where supply voltage may
vary, such as automotive electrical systems and battery pow- Driving analog optocouplers
ered equipment. These amplifiers have true rail-to-rail output High side sensing and can supply a respectable amount of current (15 m A) with
Below ground current sensing
minimal head- room from either rail (300 m V) at low distortion
Photodiode biasing
(0.05% THD+Noise). There are several package options for
each part. Standard SOIC versions of both parts make up- Driving varactor diodes in PLLs
grading existing designs easy. LM7322 is offered in a space Wide voltage range power supplies saving 8-Pin MSOP package. The LM7321 is offered in small
Automotive
SOT23-5 package, which makes it easy to place this part
International power supplies
close to sensors for better circuit performance.
Typical Performance Characteristics
Output Swing vs. Sourcing Current Large Signal Step Response
© 2008 National Semiconductor Corporation www.national.com
Page Summary Contents For NATIONAL SEMICONDUCTOR LM7321 User Guide and Manual
Manual Details
| Brand | National |
|---|---|
| Pages | 24 |
| File Size | 746.30 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What is the recommended supply voltage range?
The devices operate with a wide supply voltage range of 2.5V to 32V.
Can these amplifiers handle capacitive loads?
Yes, they are designed to drive unlimited capacitive loads without oscillations.
How do I achieve high performance in extreme temperatures?
They maintain high performance from –40°C to 125°C due to extensive testing and component design.
What makes the LM7321/LM7322 suitable for industrial or automotive uses?
Their robust temperature range (-40°C to 125°C) and wide voltage operating range make them suitable for these demanding applications.