LT1490ACMS8#PBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1490ACMS8#PBF is a dual micropower operational amplifier featuring rail-to-rail input and output capabilities. It operates on single or split supplies ranging from 2V to 44V, drawing only 40µA of quiescent current per amplifier. Key electrical specifications include a maximum input offset voltage of 500µV, a gain bandwidth product of 200kHz, and a high output current capability of 20mA. The device incorporates reverse supply protection up to 18V and an Over-The-Top input stage that allows common mode voltages to extend 44V above the negative supply.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Over-The-Top input stage extends common mode range 44V above V–
• Reverse battery protection up to 18V with negligible current draw
• Rail-to-rail input and output operation
• Micropower consumption of 40µA per amplifier

Instrumentation, Op Amps, Buffer Amps Applications

• Battery monitoring systems
• Portable instrumentation
• Sensor conditioning circuits
• Supply current sensing
• Micropower active filters

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific temperature grade and package variant against design requirements. Confirm lead-free finish compliance and RoHS status for environmental regulations. Ensure proper ESD handling precautions are observed during assembly due to electrostatic sensitivity.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring low power consumption alongside precision signal processing. The wide supply voltage range and over-the-top input capability make it suitable for battery-operated devices. Verify capacitive load compensation requirements if driving loads exceeding 200pF.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT1490A/LT1491A family of dual and quad op amps manufactured by Analog Devices. It shares architectural similarities with other micropower rail-to-rail amplifiers but is distinguished by its specific over-the-top input stage and reverse supply protection features.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Consult manufacturer documentation for verified substitute part numbers. Ensure any replacement maintains compatible pinout, supply voltage range, and electrical performance characteristics.

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 operate and remain high impedance when above the positive supply, taking up to 44V differential and common mode even on a 3V supply.

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

The amplifier is internally compensated to drive at least 200pF of capacitance under any output loading conditions without external compensation.