Analog Devices Inc./Maxim Integrated MAX4075ADEUA+

Overview

The MAX4075ADEUA+ from Maxim Integrated is a single-channel, fixed-gain, rail-to-rail output operational amplifier in µMAX-8 package, featuring factory-trimmed internal resistors for 0.1% gain accuracy, ±17V input fault protection, and 34µA supply current. It operates from +2.5V to +5.5V and delivers up to 4MHz gain-bandwidth product at AV = +25V/V to +101V/V, targeting low-side current-sense and photodiode preamplifier applications.

For engineers reviewing the MAX4075ADEUA+ datasheet, MAX4075ADEUA+ pinout, MAX4075ADEUA+ application, or MAX4075ADEUA+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for volume procurement and BOM continuity.

Technical Context

The MAX4075ADEUA+ integrates a decompensated rail-to-rail op amp core with laser-trimmed on-chip feedback resistors (RF/RG), enabling fixed noninverting gains from +1.25V/V to +101V/V or inverting gains from –0.25V/V to –100V/V. Its compensation is optimized per gain version to maximize bandwidth-e.g., AV = +25V/V yields 120kHz –3dB bandwidth, versus only ~8kHz for a unity-gain-stable op amp at same gain.

Input fault protection uses back-to-back SCR structures and diode clamps with 5kΩ series resistance on IN+ and RG on IN–, limiting input fault current to <3.5mA at ±17V overvoltage. Output drives 1kΩ load rail-to-rail while maintaining DC accuracy, and remains stable with capacitive loads ≤100pF without isolation resistor.

Key Specifications

Pinout & Package

Package: 8-pin µMAX (3mm × 3mm, 0.65mm pitch), thermally enhanced, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-gain amplifier applications.

Compared with MAX4075AEUA+ and MAX4075BEUA+, the MAX4075ADEUA+ offers the lowest standard noninverting gain (+1.25V/V), enabling highest bandwidth (>1MHz) and widest input common-mode range-ideal for precision reference amplification where minimal gain error and maximum speed are critical.

Availability

MAX4075ADEUA+ is available at Aetrix Electronics and suitable for portable battery-powered equipment, photodiode preamplifiers, low-side current-sense amplifiers, and smart-card readers requiring stable component supply and long-term BOM continuity.

Supply support for MAX4075ADEUA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and consumer systems.

The MAX4075ADEUA+ belongs to the GainAmp™ family of fixed-gain op amps, engineered to replace discrete op amp + resistor networks in space-constrained, low-power signal-conditioning circuits while guaranteeing 0.1% gain accuracy and robust fault tolerance.

FAQ

What is the exact gain configuration of the MAX4075ADEUA+?

The MAX4075ADEUA+ is configured for noninverting gain of +1.25V/V, as indicated by top mark "AD" in the Gain Selector Guide. This gain is achieved via factory-laser-trimmed internal RF/RG resistors, delivering ±0.1% accuracy across temperature and supply voltage. The device does not support user-programmable gain changes.

Does the MAX4075ADEUA+ support dual-supply operation?

Yes, the MAX4075ADEUA+ operates from ±1.25V to ±2.75V dual supplies, in addition to its primary +2.5V to +5.5V single-supply range. When using dual supplies, VEE must be connected to the negative rail (e.g., –2.5V), and input common-mode range extends from 150mV below VEE to within 1.2V of VCC, per datasheet specifications.

What is the maximum capacitive load the MAX4075ADEUA+ can drive without oscillation?

The MAX4075ADEUA+ is stable with capacitive loads up to 100pF without requiring an external isolation resistor. This is verified in the datasheet's Capacitive Load Stability parameter (CLOAD = 100pF, no sustained oscillations). Driving >100pF may require adding a 10Ω–100Ω series resistor at the output to restore phase margin.

How does the ±17V input fault protection work on the MAX4075ADEUA+?

The MAX4075ADEUA+ employs back-to-back SCR structures and diode clamps at both IN+ and IN– pins. A 5kΩ resistor limits current on IN+, while the internal RG resistor limits current on IN–. At ±17V fault voltage, total input current stays below 3.5mA, preventing damage to the IC or upstream signal source-verified under Absolute Maximum Ratings and Applications Information sections.

Is the MAX4075ADEUA+ pin-compatible with other MAX407x variants in µMAX-8 package?

No-while MAX4075ADEUA+, MAX4075AEUA+, and MAX4075BEUA+ share the µMAX-8 package footprint, their pin functions differ: MAX4075ADEUA+ uses pins 1–5 for Channel A (OUT, IN–, IN+, VEE, VCC) and leaves pins 6–8 (INB–, INB+, OUTB) unused. Other variants like MAX4077 (dual) assign active functions to those pins; thus, direct substitution requires schematic and layout review.