National Semiconductor LMC6492 Dual LMC6494 Quad CMOS Rail-to-Rail Input and Output Operational Amplifier Data Manual
Summary
These LMC6492/LMC6494 CMOS Operational Amplifiers are designed for high-accuracy, rail-to-rail signal processing in single-supply systems. Built specifically for demanding automotive applications, they provide exceptional performance across a wide temperature range (−40°C to +125°C) while minimizing non-linear errors. This manual provides critical technical specifications on ultra-low input current (150 fA), high CMRR/PSRR, and robust functionality, making them ideal for signal interfacing with sensitive sensors like pressure, oxygen, or speed transducers.
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LM ual/LM uad ail-to-R ail Input and utput perational A plifier
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LMC6492 Dual/LMC6494 Quad CMOS Rail-to-Rail Input and Output Operational Amplifier General Description Features The LMC6492/LMC6494 amplifiers were specifically devel- (Typical unless otherwise noted) oped for single supply applications that operate from −40˚C Rail-to-Rail input common-mode voltage range, to +125˚C. This feature is well-suited for automotive systems guaranteed over temperature because of the wide temperature range. unique design to- Rail-to-Rail output swing within m V of supply rail, pology enables the LMC6492/LMC6494 common-mode volt- kΩ load age range to accommodate input signals beyond the rails.
Operates from 5V to 15V supply
This eliminates non-linear output errors due to input signals
Excellent CMRR and PSRR d B
exceeding traditionally limited common-mode voltage
Ultra low input current f A
range. The LMC6492/LMC6494 signal range has high
High voltage gain (RL kΩ) d B
CMRR of d B for excellent accuracy in non-inverting circuit
configurations. Low supply current VS 5V) µA/Amplifier
Low offset voltage drift 1.0 µV/˚C
The LMC6492/LMC6494 rail-to-rail input is complemented by rail-to-rail output swing. This assures maximum dynamic signal range which is particularly important in 5V systems. Applications Ultra-low input current of f A and d B open loop gain Automotive transducer amplifier provide high accuracy and direct interfacing with high imped- Pressure sensor ance sources.
Oxygen sensor Temperature sensor Speed sensor
Connection Diagrams
8-Pin DIP/SO 14-Pin DIP/SO
DS012049-1
DS012049-2
National Semiconductor Corporation DS012049 www.national.com
Page Summary Contents For National Semiconductor LMC6492 Dual LMC6494 Quad CMOS Rail-to-Rail Input and Output Operational Amplifier Data Manual
Manual Details
| Brand | National |
|---|---|
| Pages | 18 |
| File Size | 708.72 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What operating temperature range can this amplifier handle?
It operates over a wide range of -40°C to +125°C, making it suitable for automotive systems.
Does it work with multiple power supplies?
The supply voltage operates from 2.5V ≤ V ≤ 15.5V and is designed for single-supply applications.
How well does the output signal range during operation?
It features rail-to-rail input and output, ensuring maximum dynamic signal range in 5V systems.
What are its technical strengths in signal handling?
Key features include ultra low input current (150 fA), high voltage gain (120 dB open loop), and excellent CMRR of 82 dB.