MAX4274BKEUA+

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4274BKEUA+ is a dual-channel fixed-gain amplifier from the GainAmp family, manufactured by Analog Devices Inc./Maxim Integrated. It integrates a rail-to-rail operational amplifier with factory-trimmed internal gain-setting resistors and VCC/2 biasing at the noninverting input. The device operates on a single +2.5V to +5.5V supply or ±1.25V to ±2.75V dual supplies, consuming 300µA per amplifier. It offers 0.1% gain accuracy, up to 23MHz GBW product, and ±17V input fault protection. The component is housed in an SOT23-5 package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates precision laser-trimmed internal gain-setting resistors for simplified design
• Features internal VCC/2 biasing at the noninverting input for single-supply AC-coupled applications
• Provides high-voltage fault protection capable of withstanding ±17V at either input without excessive current draw
• Delivers rail-to-rail output swing while driving a 1kΩ load

Instrumentation, Op Amps, Buffer Amps Applications

• Portable Instruments
• Smart-Card Readers
• Infrared Receivers for Remote Controls
• Low-Side Current-Sense Amplifiers
• Photodiode Preamps

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'EUA+' against official documentation to confirm lead-free status and RoHS compliance. Confirm the exact gain code associated with the part number variant. Ensure the source material explicitly supports the ordering suffix functionality before assuming functional differences. Cross-reference the manufacturer's latest datasheet revision for any potential updates to pinout or electrical characteristics.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a fixed gain configuration is required to reduce board space and external resistor count. The internal VCC/2 bias simplifies single-supply designs by eliminating external bias networks. Verify that the required gain falls within the available standard options provided in the Gain Selection Guide. Ensure the application does not require voltages exceeding the ±17V input fault protection limits.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the MAX4174/MAX4175/MAX4274/MAX4275 GainAmp family. It is a dual-channel version of the single-channel MAX4174/MAX4175. The family combines low-cost rail-to-rail op amps with precision internal gain-setting resistors. Other variants include open-loop unity-gain stable amplifiers (MAX4281/2/4) and quad-channel versions.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Public confirmed substitute part numbers: MAX4174BKEUA+, MAX4274BCEUA.