Analog Devices Inc./Maxim Integrated MAX4075BNEUA+

Overview

MAX4075BNEUA+ from Maxim Integrated is a micropower, fixed-gain, rail-to-rail output operational amplifier in an 8-pin µMAX package. It features factory-trimmed internal resistors for ±0.1% gain accuracy, operates from +2.5V to +5.5V single supply, consumes only 34µA quiescent current, and provides fault-protected inputs rated to ±17V. It is used in low-side current-sense amplification and photodiode preamplification where precision gain, small size, and input overvoltage resilience are critical.

For engineers reviewing the MAX4075BNEUA+ datasheet, MAX4075BNEUA+ pinout, MAX4075BNEUA+ application, or MAX4075BNEUA+ equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative parts - all grounded in Maxim's official specifications for the MAX4075BNEUA+ variant with B-grade temperature range and µMAX packaging.

Technical Context

The MAX4075BNEUA+ is a dual-channel fixed-gain GainAmp™ op amp with laser-trimmed on-chip feedback resistors (RF/RG) enabling precise noninverting gains from +1.25V/V to +101V/V or inverting gains from −0.25V/V to −100V/V. Its decompensated core achieves up to 4MHz gain-bandwidth product at AV = +25V/V to +101V/V, while maintaining stability with capacitive loads ≤100pF without external isolation.

Input fault protection uses back-to-back SCR structures and diode clamps at both IN+ and IN− pins, limiting input fault current to <3.5mA under ±17V overvoltage. The rail-to-rail output drives 1kΩ loads while preserving DC accuracy, and the input common-mode range extends from VEE − 0.15V to VCC − 1.2V for the noninverting input.

Key Specifications

Pinout & Package

MAX4075BNEUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), pin-compatible with SO-8 but with reduced footprint and thermal resistance. Pin assignments are fully defined per Maxim's functional diagram for MAX4075.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4075BEUA+, MAX4075BNEUA+ trades 15°C upper temperature margin for lower unit cost and same performance in commercial environments; compared with MAX4075AEUA+, it offers 2× looser gain tolerance at ~30% lower price, making it optimal for cost-sensitive, high-volume current-sense modules.

Availability

MAX4075BNEUA+ is available at Aetrix Electronics and suitable for low-power sensing, portable instrumentation, and infrared receiver designs requiring stable component supply, consistent gain accuracy, and long-term manufacturability.

Supply support for MAX4075BNEUA+ 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, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The MAX4075BNEUA+ 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 systems.

FAQ

What is the operating temperature range for MAX4075BNEUA+?

The MAX4075BNEUA+ is specified for operation from −40°C to +70°C. This commercial temperature grade is validated across all electrical parameters in the datasheet, including gain accuracy, input bias current, and output swing. It is not rated for extended industrial or automotive temperature ranges; for those, consider MAX4075BEUA+ (−40°C to +85°C). All thermal derating curves and reliability data apply strictly within this −40°C to +70°C window.

Does MAX4075BNEUA+ support single-supply operation?

Yes, MAX4075BNEUA+ operates from a single +2.5V to +5.5V supply, with rail-to-rail output swing and input common-mode range extending to within 1.2V of VCC. Its dual amplifiers function independently in single-supply mode, and internal biasing allows DC-coupled inverting or noninverting configurations without external level-shifting. The device draws only 34µA per channel, making it ideal for battery-powered single-supply systems like portable meters and wearables.

What gain options are available for MAX4075BNEUA+?

MAX4075BNEUA+ supports 54 standard fixed gains: noninverting from +1.25V/V to +101V/V and inverting from −0.25V/V to −100V/V. The "B" in the part number denotes the B-grade temperature range, but the gain code is embedded separately in the full ordering number (e.g., MAX4075BNEUA+ with top mark "BC" = −15V/V inverting gain). Gain selection is determined by laser-trimmed internal RF/RG ratios - no external resistors required - and is confirmed per unit via top-mark decoding per Maxim's Gain Selector Guide.

Is MAX4075BNEUA+ pin-compatible with other packages in the MAX4075 family?

No - MAX4075BNEUA+ uses the 8-pin µMAX package (3mm × 3mm), which is not pin-compatible with the SO-8 version (MAX4075BESA+) or SOT23-5 variants. While all MAX4075 versions share identical electrical functionality and pin functions, the µMAX package has different pin numbering and physical layout. Board redesign is required when migrating from SO-8 or SOT23-5 to µMAX; however, schematic symbol and netlist remain unchanged due to consistent pin naming (e.g., VCC, OUTA, INB−).

How does the ±17V input fault protection work in MAX4075BNEUA+?

MAX4075BNEUA+ implements ±17V input fault protection using back-to-back SCR structures and diode clamps at both IN+ and IN− pins. When either input exceeds VEE − 17V or VCC + 17V, the SCR triggers and limits fault current to <3.5mA via internal 5kΩ (IN+) or RG (IN−) series resistance. This protects both the MAX4075BNEUA+ and upstream signal sources from damage during transient overvoltage events - such as ESD or inductive switching - without affecting normal operation below ±17V.