MAX4275ABEUA

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4275ABEUA 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. Key electrical parameters include a 0.7V/µs slew rate, 90nV/√Hz input voltage noise density, and high-voltage fault protection capable of withstanding ±17V at either input.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates precision internal gain-setting resistors providing 0.1% gain accuracy
• Features internal VCC/2 biasing at the noninverting input for simplified single-supply designs
• Provides rail-to-rail output capability while driving a 1kΩ load
• Includes high-voltage fault protection allowing inputs to withstand ±17V

Instrumentation, Op Amps, Buffer Amps Applications

• Portable Instruments
• Smart-Card Readers
• Infrared Receivers for Remote Controls
• Keyless Entry Systems
• Low-Side Current-Sense Amplifiers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'BEUA' against official manufacturer documentation to confirm package type and temperature range specifications. Confirm current production status as the GainAmp family may have discontinued variants. Ensure compatibility with existing board layouts when replacing discrete op-amp resistor networks.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring fixed gain without external feedback resistors. The internal VCC/2 bias simplifies AC-coupled single-supply designs. Verify that the required gain value matches available factory-trimmed options within the -0.25V/V to +101V/V range. Consider capacitive load stability limits when driving reactive loads.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the Maxim Integrated GainAmp family, which combines low-cost rail-to-rail op amps with laser-trimmed internal resistors. The MAX4275 variant specifically includes VCC/2 biasing, distinguishing it from the standard MAX4274. This integration reduces design size, cost, and layout complexity compared to discrete solutions.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct replacements include other GainAmp variants such as the MAX4274 (without VCC/2 bias) or open-loop versions like the MAX4281/MAX4282. Verify pinout compatibility and ensure the substitute supports the required gain configuration and supply voltage range.