MAX4275BKEUA

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4275BKEUA 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 standard noninverting gains from +1.25V/V to +101V/V with 0.1% accuracy. Key electrical parameters include a 0.7V/µs slew rate, up to 2MHz gain-bandwidth product, and high-voltage fault protection capable of withstanding ±17V inputs.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates precision laser-trimmed internal gain-setting resistors for 0.1% gain accuracy
• Features internal VCC/2 biasing at the noninverting input to simplify single-supply AC-coupled designs
• Provides rail-to-rail output capability while driving a 1kΩ load
• Includes high-voltage fault protection allowing inputs to withstand ±17V without damage

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 'BKEUA' against official manufacturer documentation to confirm package type and temperature range, as datasheets primarily list 'EUK' variants. Confirm availability status directly with authorized distributors, as this component may be subject to obsolescence or limited stock conditions. Ensure the selected part matches the required gain code configuration for the specific application circuit.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the MAX4275BKEUA when a fixed gain configuration is required to reduce external component count and board space. The internal VCC/2 bias makes it suitable for single-supply applications where AC coupling is used. Verify that the required gain falls within the available standard options (+1.25V/V to +101V/V) and that the 0.7V/µs slew rate meets the signal speed requirements of the system.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the Maxim Integrated GainAmp family, which combines low-cost op amps with precision internal feedback networks. The MAX4275 variant specifically includes the VCC/2 bias feature, distinguishing it from the MAX4274 which lacks this internal biasing. This family is designed to replace discrete resistor-op amp combinations in compact designs.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

MAX4274BKEUA: Identical electrical characteristics but lacks the internal VCC/2 biasing at the noninverting input; requires external biasing for single-supply AC-coupled applications.