Analog Devices Inc./Maxim Integrated MAX4075CAEUA

Overview

The MAX4075CAEUA from Maxim Integrated is a single-channel, fixed-gain, rail-to-rail output operational amplifier in a µMAX-8 package, featuring factory-trimmed internal resistors for 0.1% gain accuracy, ±17V input fault protection, and operation from +2.5V to +5.5V single supply with only 34µA quiescent current. It delivers noninverting gain of +25V/V and supports low-side current-sense and photodiode preamplifier applications.

For engineers reviewing the MAX4075CAEUA datasheet, MAX4075CAEUA pinout, MAX4075CAEUA application, or MAX4075CAEUA equivalent, this page provides verified technical context, confirmed pin functions, real-world use cases, and validated alternative options for precision gain-stable signal conditioning in space-constrained, battery-powered systems.

Technical Context

The MAX4075CAEUA implements a decompensated op amp core optimized for fixed noninverting gain of +25V/V, achieving 120kHz −3dB bandwidth and 4MHz gain-bandwidth product. Its internal laser-trimmed RF/RG resistor network eliminates external components while maintaining 0.1% gain accuracy across temperature.

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 stability is guaranteed up to 100pF capacitive load without isolation resistors.

Key Specifications

Pinout & Package

Package: 8-pin µMAX (3mm × 3mm, 0.8mm height), pin-compatible with 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 amplifier applications.

Compared with MAX4075CAUSA and AD8236ARMZ, the MAX4075CAEUA uniquely combines ultra-small µMAX packaging, 0.1% factory-trimmed gain, ±17V input fault protection, and micropower operation - making it optimal for miniaturized, robust, battery-operated sensing nodes where layout area and reliability are critical.

Availability

MAX4075CAEUA is available at Aetrix Electronics and suitable for low-power portable instrumentation, infrared receiver modules, and smart-card reader designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX4075CAEUA 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 MAX4075CAEUA 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 gain accuracy and fault resilience.

FAQ

What is the exact gain configuration of the MAX4075CAEUA?

The MAX4075CAEUA is configured for noninverting gain of +25V/V, as indicated by the 'C' in its part number per Maxim's Gain Selector Guide. This gain is set by internal laser-trimmed RF/RG resistors with 0.1% accuracy and cannot be altered externally. The device does not support inverting configurations or user-adjustable gain.

Does the MAX4075CAEUA require external gain-setting resistors?

No, the MAX4075CAEUA does not require external gain-setting resistors. It integrates factory-laser-trimmed RF and RG resistors internally, delivering precise +25V/V noninverting gain. This eliminates layout complexity, component count, and tolerance-induced gain error - a key differentiator from standard op amps like the MAX4076.

Can the MAX4075CAEUA operate from a 2.5V supply?

Yes, the MAX4075CAEUA is fully specified to operate from +2.5V to +5.5V single supply. At 2.5V, it maintains rail-to-rail output swing, 34µA supply current, and functional gain accuracy - enabling direct use in Li-ion battery–powered systems down to end-of-discharge voltage.

What is the purpose of pins 6, 7, and 8 on the MAX4075CAEUA?

Pins 6 (INB−), 7 (INB+), and 8 (OUTB) are unused and not internally connected in the MAX4075CAEUA. These pins exist due to the shared µMAX-8 die pad layout with dual-channel variants (e.g., MAX4077). They must be left floating or tied to ground - no current flows through them, and they serve no functional role in the MAX4075CAEUA.

Is the MAX4075CAEUA suitable for driving ADC inputs directly?

Yes, the MAX4075CAEUA is well-suited for driving SAR and delta-sigma ADC inputs. Its rail-to-rail output swings within 25mV of VCC and VEE into 1kΩ, its 0.1% gain accuracy ensures predictable scaling, and its 100pF capacitive-load stability eliminates need for output isolation - simplifying front-end design for precision data acquisition.