Analog Devices Inc./Maxim Integrated MAX4075ADEUA

Overview

The MAX4075ADEUA from Maxim Integrated is a micropower, fixed-gain, rail-to-rail operational amplifier in an 8-pin µMAX package, featuring factory-trimmed internal resistors for ±0.1% gain accuracy, ±17V input fault protection, 34µA supply current, and operation from +2.5V to +5.5V single supply. It serves as a precision signal-conditioning amplifier in low-side current-sense and photodiode preamp circuits.

For engineers reviewing the MAX4075ADEUA datasheet, MAX4075ADEUA pinout, MAX4075ADEUA application, or MAX4075ADEUA equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and application-level differences.

Technical Context

The MAX4075ADEUA implements a decompensated op-amp core optimized for fixed closed-loop gains - specifically noninverting gains up to +101V/V and inverting gains down to -100V/V - enabling up to 4MHz gain-bandwidth product at AV = +25V/V to +101V/V. Its internal laser-trimmed RF/RG resistor network eliminates external gain-setting components while maintaining 0.1% ratio accuracy.

Input fault protection uses back-to-back SCR structures and diode clamps on both IN+ and IN− pins, allowing ±17V overvoltage tolerance without phase reversal or excessive current draw (<3.5mA). The rail-to-rail output drives 1kΩ loads while preserving DC accuracy, and stability is guaranteed with capacitive loads ≤100pF without isolation resistors.

Key Specifications

Pinout & Package

The MAX4075ADEUA is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with industry-standard SO-8 but with reduced footprint and thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4075AEUA (identical function, different marking), the MAX4075ADEUA offers identical performance and fit; versus AD8236ARMZ, it provides lower power, tighter gain accuracy, integrated resistors, and fault protection - making it superior for cost-sensitive, space-constrained single-ended amplification tasks.

Availability

The MAX4075ADEUA is available at Aetrix Electronics and suitable for low-power portable instrumentation, infrared remote receivers, and smart-card reader designs requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing.

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, automotive, and consumer markets.

The MAX4075ADEUA belongs to the GainAmp™ family of fixed-gain op amps, engineered to replace discrete op amp + resistor networks in space- and power-constrained signal-conditioning circuits while guaranteeing ±0.1% gain accuracy and ±17V fault resilience.

FAQ

What is the exact gain configuration of the MAX4075ADEUA?

The MAX4075ADEUA is a dual-channel fixed-gain op amp with top-mark "AD", corresponding to noninverting gain +1.25V/V and inverting gain −0.25V/V per channel, as defined in the Gain Selector Guide. This configuration is laser-trimmed on-die and cannot be altered externally. Both channels share identical gain settings and operate independently.

Does the MAX4075ADEUA require external gain-setting resistors?

No, the MAX4075ADEUA does not require external gain-setting resistors. It integrates factory-laser-trimmed RF and RG resistors internally, delivering ±0.1% gain accuracy for its specified gain configuration (+1.25V/V noninverting, −0.25V/V inverting). This eliminates layout complexity, reduces component count, and improves production consistency compared to discrete op amp implementations.

Can the MAX4075ADEUA operate from a 3.3V supply?

Yes, the MAX4075ADEUA operates from +2.5V to +5.5V single supply, making it fully compatible with standard 3.3V systems. At VCC = 3.3V, it maintains rail-to-rail output swing into 1kΩ, 34µA supply current, and retains ±17V input fault protection - all critical for reliable operation in battery-powered 3.3V microcontroller-based designs.

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

The MAX4075ADEUA is guaranteed stable with capacitive loads up to 100pF without requiring external isolation resistors. This specification is verified across temperature and supply voltage ranges. Driving loads >100pF may cause peaking or ringing; for such cases, a 10Ω–100Ω series isolation resistor at the output restores stability while minimally affecting DC gain.

Is the MAX4075ADEUA pin-compatible with other packages in the MAX4074–MAX4078 family?

The MAX4075ADEUA in 8-pin µMAX is pin-compatible with the MAX4075ESA (SO-8) for Channels A and B I/O, but differs from SOT23-5 variants (e.g., MAX4074) which are single-channel. Pin 1 (OUTA), 2 (INA−), 3 (INA+), 4 (VEE), 5 (VCC), 6 (INB+), 7 (INB−), and 8 (OUTB) retain consistent function across µMAX and SO-8 packages - enabling direct footprint reuse in layout upgrades.