MAX4255EUK+T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4255EUK+T is a single-channel, low-noise, low-distortion operational amplifier from the MAX4249–MAX4257 series. It features rail-to-rail outputs and operates on a single supply from 2.4V to 5.5V (or dual supplies of ±1.2V to ±2.75V). The device draws 400µA quiescent current per amplifier. It has a gain-bandwidth product of 22MHz and is internally compensated for gains of 10V/V or greater. Key electrical characteristics include an input offset voltage of 70µV, input bias current of 1pA, and input voltage noise density of 27nV/√Hz at 10Hz. It supports capacitive loads up to 400pF without oscillation.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low distortion performance with minimal harmonic generation
• Rail-to-rail output capability extending close to supply rails
• Single-supply operation compatible with ground-sensing inputs
• High input impedance suitable for high-impedance signal sources

Instrumentation, Op Amps, Buffer Amps Applications

• Wireless Communications Devices
• Portable/Battery-Powered Equipment
• Medical Instrumentation
• ADC Buffers
• Digital Scales/Strain Gauges

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'EUK' corresponds to the 5-pin SOT23 package and standard industrial temperature range (-40°C to +85°C) as listed in the official Analog Devices selector guide. Confirm that the '+T' designation indicates tape-and-reel packaging if reel quantity is required for assembly. Ensure the component matches the lead-free/RoHS-compliant specification indicated by the '+' symbol in the ordering information.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this part when a single amplifier with high bandwidth (22MHz GBW) and low noise is required in a compact footprint. Unlike the unity-gain stable variants in the same family, the MAX4255 requires a closed-loop gain of at least 10V/V for stability. It is suitable for applications needing rail-to-rail output swing and low power consumption, provided the system does not require shutdown functionality, which is absent in this specific model.

Instrumentation, Op Amps, Buffer Amps Part Context

The MAX4255 belongs to the MAX4249–MAX4257 family of UCSP, single-supply, low-noise, low-distortion, rail-to-rail op amps manufactured by Analog Devices / Maxim Integrated. This family offers various channel counts and packages, including SOT23, µMAX, SO, and UCSP. The MAX4255 specifically provides a single channel in a space-saving 5-pin SOT23 package, distinguishing it from multi-channel or larger package variants within the series.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The MAX4250EUK+T is a direct functional substitute within the same package but offers unity-gain stability with a lower 3MHz gain-bandwidth product. Other family members like the MAX4256 share similar electrical characteristics but differ in channel count or package type.