LT1638IDD#PBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1638IDD#PBF is a dual micropower operational amplifier featuring rail-to-rail input and output capabilities. It operates on supply voltages from 2.5V to 44V with a quiescent current of 170µA per amplifier. Key electrical specifications include a gain bandwidth product of 1.2MHz, a slew rate of 0.4V/µs, and a maximum input offset voltage of 1450µV in the DFN package. The device supports inputs above the positive supply rail and includes reverse battery protection up to 18V.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Over-The-Top operation allows inputs to exceed the positive supply voltage
• Rail-to-rail input and output performance across the full supply range
• Reverse battery protection provides safety against negative supply conditions

Instrumentation, Op Amps, Buffer Amps Applications

• Battery or solar-powered systems requiring low power consumption
• Portable instrumentation where space and energy efficiency are critical
• Sensor conditioning circuits for precision signal processing
• Supply current sensing applications utilizing high common-mode voltage tolerance
• Micropower active filters for signal chain integration

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific temperature grade and package variant when sourcing replacements. Confirm that the lead-free finish matches project requirements. Ensure the operating environment stays within the specified junction temperature limits to maintain reliability. Check for availability of evaluation boards if design validation is needed.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for designs requiring high common-mode voltage tolerance without phase reversal. The DFN package offers a compact footprint suitable for space-constrained layouts. Consider the input offset voltage drift when designing for wide temperature ranges. Verify capacitive load driving capabilities to ensure stability in the final application.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the LT1638/LT1639 family of micropower op amps. The LT1638 is the dual-channel version, while the LT1639 provides four channels. Both share identical electrical characteristics and Over-The-Top functionality. The family is designed for general-purpose applications requiring low power and high precision.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

LT1638CDD#PBF

Instrumentation, Op Amps, Buffer Amps FAQ

How does the LT1638 handle inputs exceeding the positive supply voltage?

The device features Over-The-Top capability, allowing inputs to operate up to 44V above the negative supply, independent of the positive rail voltage.

What is the maximum supply voltage for the LT1638?

The total supply voltage range is from 2.5V to 44V, supporting both single and split supply configurations.