LT1490AHMS8

Instrumentation, Op Amps, Buffer Amps Overview

The LT1490AHMS8#PBF is a dual micropower operational amplifier manufactured by Analog Devices Inc. It features an over-the-top input stage allowing operation up to 44V above the negative supply, independent of the positive rail. The device offers rail-to-rail input and output capabilities with a maximum input offset voltage of 500μV. It operates on total supplies from 2V to 44V, drawing only 50μA per amplifier. The component is housed in an 8-lead plastic MSOP package and supports an industrial temperature range of -40°C to 125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Over-The-Top input common mode range extends 44V above V–
• Micropower consumption of 50μA per amplifier
• Rail-to-rail input and output swing
• Reverse battery protection up to 18V

Instrumentation, Op Amps, Buffer Amps Applications

• Battery or solar-powered systems
• Portable instrumentation
• Sensor conditioning circuits
• Supply current sensing
• Micropower active filters

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix for lead-free finish and tape-and-reel packaging options. Confirm that the MSOP package variant matches the required thermal characteristics for the intended application environment. Ensure ESD handling precautions are observed during assembly due to internal protection structures.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this part for applications requiring high voltage tolerance above the positive supply rail while maintaining low power consumption. The 500μV max offset voltage makes it suitable for precision sensor interfaces. Consider the 8-lead MSOP package for space-constrained designs requiring extended temperature performance.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the LT1490A/LT1491A family of dual and quad op amps. It shares architectural similarities with other micropower rail-to-rail amplifiers but distinguishes itself through its unique over-the-top input stage capability. The family includes variants with different temperature grades and package options to suit various design constraints.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1490AIMS8#PBF

Instrumentation, Op Amps, Buffer Amps FAQ

How does the LT1490AHMS8 handle inputs exceeding the positive supply voltage?

The amplifier features a unique input stage that remains high impedance when inputs are above the positive supply. It can tolerate 44V differential and common mode voltages even when operating on a 3V supply.

What is the maximum capacitive load the LT1490AHMS8 can drive?

It is unity-gain stable and can drive capacitive loads up to 10,000pF when optional compensation consisting of a 0.22μF capacitor and a 150Ω resistor is used.