LT1638CDD#PBF

Instrumentation, Op Amps, Buffer Amps Overview

The LT1638CDD#PBF is a dual micropower operational amplifier from Analog Devices, housed in an 8-lead DFN package. It features rail-to-rail input and output capabilities with a gain bandwidth product of 1.2 MHz and a slew rate of 0.4 V/µs. The device operates on supplies ranging from 2.5 V to 44 V, drawing 170 µA per amplifier. Key specifications include a maximum input offset voltage of 400 µV, 98 dB common-mode rejection ratio, and reverse battery protection up to 18 V.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Operates with inputs above the positive supply rail
• Reverse battery protection up to 18 V
• Rail-to-rail input and output performance

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 temperature grade and package variant against project requirements. Confirm availability through authorized distributors as stock levels fluctuate. Ensure proper handling for the leadless DFN package during assembly to maintain thermal and electrical integrity.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring high voltage input ranges relative to the supply. The low quiescent current makes it suitable for battery-operated devices. Consider the DFN package for space-constrained designs while ensuring adequate thermal management for the exposed pad.

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 offers four channels. Both families share similar electrical characteristics but differ in channel count and pin configurations, such as the 8-pin DFN used here versus 14-pin options for the quad variant.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct replacements within the same series include the LT1638IDD#PBF for the industrial temperature grade. Other package variants like the MSOP or PDIP versions may be considered if form factor changes are acceptable.

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 44 V above the negative supply, independent of the positive supply voltage.

What is the maximum reverse supply voltage the LT1638 can withstand?

The LT1638 provides reverse battery protection, capable of withstanding reverse supply voltages up to 18 V without damage.