LT1490AHMS8#TRPBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1490AHMS8#TRPBF is a dual micropower operational amplifier featuring rail-to-rail input and output capabilities. It operates on total supplies from 2V to 44V with a quiescent current of 50µA per amplifier. The device offers reverse supply protection up to 18V and an over-the-top input range extending 44V above the negative supply. It provides high output current drive of 20mA and unity-gain stability for capacitive loads up to 10,000pF with compensation. This specific part is housed in an 8-lead plastic MSOP package and is rated for operation from -40°C to 125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Over-The-Top input common mode range extends 44V above V– independent of V+
• Micropower consumption with only 50µA supply current per amplifier
• Reverse battery protection up to 18V without phase reversal
• Rail-to-rail output swings within 10mV of the negative supply

Instrumentation, Op Amps, Buffer Amps Applications

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

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the AH grade designation corresponds to the extended industrial temperature range of -40°C to 125°C. Ensure compatibility with the 8-lead MSOP footprint during procurement planning.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this amplifier for low-power designs requiring inputs to exceed the positive supply voltage. The high output current capability supports heavy loads without external buffering. Verify that the 200kHz gain bandwidth product meets the signal frequency requirements of the target application circuit.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the LT1490A/LT1491A family of dual and quad op amps manufactured by Analog Devices Inc. The LT1490A variant specifically contains two amplifiers, whereas the LT1491A contains four. The series is designed for precision applications where low power consumption and wide input voltage ranges are critical constraints.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Consult Linear Technology marketing for parts specified with wider operating temperature ranges if the standard industrial limits are insufficient for the intended environment.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the LT1490A handle inputs exceeding the positive supply voltage?

The unique input stage allows the inputs to take 44V both differential and common mode even when operating on a 3V supply, without causing output phase reversal.

What is the maximum capacitive load the LT1490A can drive stably?

It drives all capacitive loads up to 10,000pF when optional 0.22µF and 150Ω compensation is used between the output and ground.