OPA338UA/2K5

Instrumentation, Op Amps, Buffer Amps Overview

The OPA338UA/2K5 is a single-channel, high-speed CMOS operational amplifier from the MicroAmplifier series. It operates on a single supply voltage ranging from 2.7V to 5.5V and features rail-to-rail output swing. The device provides a gain-bandwidth product of 12.5MHz at a gain of 5 and a slew rate of 4.6V/µs. It maintains stability for closed-loop gains greater than or equal to 5. Key electrical characteristics include a maximum input bias current of 10pA, an open-loop gain of 120dB, and a quiescent current of 525µA per amplifier. It is housed in an SOIC-8 package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• High-speed operation with 12.5MHz gain-bandwidth product optimized for gains of 5 or higher
• Rail-to-rail output swing capability for maximizing dynamic range in low-voltage applications
• FET-input stage providing extremely low input bias current of 10pA maximum
• Single-supply operation from 2.7V to 5.5V with low quiescent current consumption

Instrumentation, Op Amps, Buffer Amps Applications

• Battery-powered instruments requiring low power consumption
• Photodiode pre-amplifiers utilizing high input impedance
• Medical instrumentation systems
• Driving analog-to-digital converters (ADCs)
• Audio systems and consumer products

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix matches the required tape and reel quantity configuration. Confirm the package designator corresponds to the SOIC-8 surface-mount variant. Ensure the temperature range specification aligns with industrial requirements. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and revision status before finalizing procurement orders.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when circuit designs require high slew rates and bandwidth specifically for non-inverting gains of 5 or greater. It is unsuitable for unity-gain buffer configurations without external compensation due to phase stability constraints. Consider the OPA337 series if unity-gain stability is mandatory. Evaluate the trade-off between the higher speed of the OPA338 and the lower cost of general-purpose amplifiers for space-constrained PCB layouts.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the Texas Instruments MicroAmplifier family, designed for miniature and low-cost applications. The OPA338 series complements the OPA337 by offering significantly higher speed performance while maintaining the same low-power CMOS architecture. Both series share identical pinouts and packaging options, facilitating flexible design choices based on bandwidth requirements within the same footprint constraints.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

OPA337UA/2K5

Instrumentation, Op Amps, Buffer Amps FAQ

Is the OPA338UA/2K5 stable in unity-gain configurations?

No, the OPA338 series is optimized for gains greater than or equal to 5. Using it in a unity-gain buffer requires external compensation capacitors to prevent instability.

What is the input common-mode voltage range?

The input common-mode voltage range extends from (V-) - 0.2V to (V+) - 1.2V, allowing operation near ground in single-supply applications.