MAX4275BAEUA

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4275BAEUA is a dual-channel fixed-gain amplifier from the GainAmp family, featuring factory-trimmed internal gain-setting resistors and VCC/2 biasing. It operates on a single +2.5V to +5.5V supply with a typical supply current of 300µA per amplifier. The device provides rail-to-rail outputs capable of driving a 1kΩ load. Key electrical parameters include a slew rate of 0.7V/µs, an input offset voltage of ±0.5mV, and an input bias current of ±10nA. It offers high-voltage fault protection up to ±17V at either input.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates precision laser-trimmed internal gain-setting resistors for accurate fixed gain configurations.
• Includes internal VCC/2 biasing at the noninverting input to simplify single-supply AC-coupled designs.
• Features rail-to-rail output swing capability while maintaining excellent DC accuracy under load.
• Provides high-voltage fault protection allowing inputs to withstand ±17V without damage.

Instrumentation, Op Amps, Buffer Amps Applications

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

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'AEUA' against the manufacturer's official datasheet to confirm the package type (8-pin µMAX) and temperature range (-40°C to +85°C). Confirm that the 'B' grade designation matches the required offset voltage and gain accuracy specifications for your application. Check for obsolescence status as this component may be discontinued or subject to last-time buy restrictions.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the MAX4275 variant specifically when internal VCC/2 biasing is required to eliminate external bias resistors in single-supply applications. Choose this part over open-loop versions if fixed gain accuracy and reduced board space are priorities. Ensure the required gain setting corresponds to one of the standard options available within the GainAmp family to utilize the factory-trimmed resistor network effectively.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the Maxim Integrated GainAmp family, which combines low-cost rail-to-rail operational amplifiers with precision internal feedback networks. The MAX4275 series specifically integrates VCC/2 biasing, distinguishing it from the MAX4274 which lacks this feature. This family is designed to replace discrete op-amp and resistor gain blocks, simplifying layout and reducing design complexity for fixed-gain applications.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The MAX4175 serves as the single-channel equivalent within the same family. For quad-channel requirements, consider the MAX4276 if available in the product line. Verify pin compatibility and gain settings when substituting with other fixed-gain amplifiers from different manufacturers.