Analog Devices Inc./Maxim Integrated MAX4274AGEUA

Overview

MAX4274AGEUA from Maxim Integrated is a single-channel, fixed-gain, rail-to-rail output operational amplifier with internal precision gain-setting resistors and ±17V input fault protection. It delivers 0.1% gain accuracy, operates from +2.5V to +5.5V, consumes only 300µA supply current, and supports noninverting gains up to +101V/V. It is used in low-side current-sense amplification and photodiode preamplifier circuits requiring stable DC accuracy and high-voltage robustness.

For engineers reviewing the MAX4274AGEUA datasheet, MAX4274AGEUA pinout, MAX4274AGEUA application, or MAX4274AGEUA equivalent, this page provides verified technical context, real-world design meaning for key specs, validated SOT23-5 pinout, confirmed alternatives for gain-matched signal conditioning, and supply-chain support for industrial sensor and portable instrumentation designs.

Technical Context

The MAX4274AGEUA integrates a rail-to-rail output op-amp core with laser-trimmed on-chip feedback resistors (RF/RG), enabling factory-set noninverting gains without external components. Its internal compensation is optimized per gain version - e.g., at AV = +25V/V to +101V/V, it achieves up to 23MHz GBW product, far exceeding unity-gain-stable op-amps in high-gain configurations.

Input fault protection uses back-to-back SCR structures and diode clamping at both IN+ and IN−, limiting input fault current to <3.5mA at ±17V overvoltage. The inverting input connects directly to RG, making its voltage range rail-referenced (VEE to VCC), while the noninverting input accepts signals within VEE − 0.15V to VCC − 1.2V in open-loop mode - though MAX4274 lacks internal VCC/2 bias (unlike MAX4275).

Key Specifications

Pinout & Package

SOT23-5 package: compact 2.9mm × 1.6mm surface-mount outline with exposed pad for thermal performance; compatible with standard reflow profiles and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4174EUK-T, MAX4274AGEUA shares identical gain accuracy, fault tolerance, and SOT23-5 footprint but may differ in production lot traceability and screening; versus AD8220BRMZ, it trades programmable gain and CMRR for lower power, smaller size, and simpler implementation in single-ended sensor interfaces.

Availability

MAX4274AGEUA is available at Aetrix Electronics and suitable for low-side current-sense amplification, photodiode preamplification, and portable instrument front-end signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4274AGEUA 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 industrial, medical, and communications applications, emphasizing integration, reliability, and low-power operation.

The MAX4274AGEUA belongs to the GainAmp™ family of fixed-gain amplifiers, engineered to replace discrete op-amp-plus-resistor configurations with monolithic solutions offering guaranteed gain accuracy, fault resilience, and minimal board space.

FAQ

What is the operating temperature range for MAX4274AGEUA?

The MAX4274AGEUA is specified for operation from −40°C to +85°C. This industrial-grade temperature range ensures reliable performance in portable instruments, smart-card readers, and automotive body-control modules where ambient conditions vary widely. All electrical characteristics - including gain accuracy, input offset voltage, and supply current - are guaranteed across this full range.

Does MAX4274AGEUA include internal VCC/2 biasing at the noninverting input?

No, MAX4274AGEUA does not include internal VCC/2 biasing. That feature is exclusive to the MAX4275 variant. MAX4274AGEUA has a standard noninverting input (IN+) with common-mode range from VEE − 0.15V to VCC − 1.2V, intended for DC-coupled applications where external biasing is controlled by the system designer. Using MAX4274AGEUA in AC-coupled single-supply designs requires external bias network.

What is the maximum capacitive load the MAX4274AGEUA can drive without oscillation?

The MAX4274AGEUA remains stable with capacitive loads up to 470pF when driving directly from the output pin, with no isolation resistor required. This capability is verified per the manufacturer's test conditions (RL = 100kΩ, VCC = +5V, TA = +25°C) and applies to anti-aliasing filters, cable capacitance, or ADC input capacitance. Loads exceeding 470pF require series output isolation (e.g., 10–100Ω) to maintain phase margin.

Can MAX4274AGEUA be used in inverting amplifier configurations?

Yes, MAX4274AGEUA supports inverting configurations using its IN− pin as the signal input and IN+ grounded or biased. However, because the internal RF/RG network is optimized for noninverting gain (AV = 1 + RF/RG), inverting use requires external feedback components and forfeits the factory-trimmed 0.1% gain accuracy. For inverting applications requiring precision, the MAX4281 open-loop op-amp variant is recommended instead.

What is the gain bandwidth product of MAX4274AGEUA at AV = +100V/V?

At AV = +100V/V, the MAX4274AGEUA achieves a −3dB bandwidth of 230kHz, corresponding to a gain-bandwidth product of 23MHz. This is achieved through strategic decompensation of the internal op-amp core - a key differentiator from unity-gain-stable amplifiers, which would deliver only ~20kHz bandwidth at the same gain. The 23MHz GBW is measured under standard conditions (VCC = +5V, RL = 100kΩ, TA = +25°C).