Analog Devices Inc./Maxim Integrated MAX4274ABEUA

Overview

MAX4274ABEUA 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 noninverting gains of +1.25V/V to +101V/V or inverting gains from –0.25V/V to –100V/V, operates from +2.5V to +5.5V, consumes only 300µA, and achieves up to 23MHz GBW at AV = +25V/V to +101V/V. It is used in low-side current-sense amplification and photodiode preamplification in portable instrumentation.

For engineers reviewing the MAX4274ABEUA datasheet, MAX4274ABEUA pinout, MAX4274ABEUA application, or MAX4274ABEUA equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional trade-offs.

Technical Context

The MAX4274ABEUA integrates a decompen­sated rail-to-rail op-amp core with laser-trimmed on-chip RF/RG resistor networks, enabling factory-set fixed gain with 0.1% accuracy. Its compensation is optimized per gain version - e.g., AV = +25V/V to +101V/V yields 23MHz GBW, while lower gains retain higher bandwidth via tailored decompensation.

Input fault protection uses back-to-back SCR structures and diode clamps with series limiting resistors (RG on IN–, 5kΩ on IN+), allowing ±17V overvoltage without phase reversal or excessive current draw (<3.5mA). The device supports capacitive loads up to 470pF without isolation resistors and maintains rail-to-rail output swing into 1kΩ.

Key Specifications

Pinout & Package

SOT23-5 package: compact 5-pin surface-mount housing with exposed pad for thermal performance; footprint compatible with industry-standard SOT23 layouts and reflow processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4174ABEUA, MAX4274ABEUA adds extended temperature support (+125°C) and identical electrical specs - ideal for automotive or industrial deployments. Versus AD8220BRMZ, it offers lower power, smaller size, and fault tolerance but lacks differential input architecture and wide-supply flexibility.

Availability

MAX4274ABEUA is available at Aetrix Electronics and suitable for portable instrumentation, smart-card readers, low-side current-sense monitoring, and photodiode preamplification requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX4274ABEUA 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 demanding industrial, medical, and communications applications.

The MAX4274ABEUA belongs to the GainAmp™ family - engineered to replace discrete op-amp + resistor gain stages with integrated, laser-trimmed fixed-gain solutions for space-constrained, high-accuracy signal conditioning.

FAQ

What is the operating temperature range for the MAX4274ABEUA?

The MAX4274ABEUA is specified for operation from –40°C to +125°C. This extended temperature range makes it suitable for under-hood automotive modules, industrial PLC I/O cards, and outdoor instrumentation where ambient conditions exceed standard commercial limits. The MAX4274ABEUA maintains its 0.1% gain accuracy and ±17V fault protection across this full range, as verified in production testing per Maxim's datasheet Rev 3.

Does the MAX4274ABEUA include internal VCC/2 biasing at the noninverting input?

No, the MAX4274ABEUA does not include internal VCC/2 biasing. That feature is exclusive to the MAX4275 variant (e.g., MAX4275ABEUA). The MAX4274ABEUA has an uncommitted IN+ pin, allowing external DC biasing for dual-supply configurations or custom AC-coupled setups. This gives designers full control over common-mode voltage - critical for precision current-sense or differential input applications where midsupply bias is not required.

What gain options are available for the MAX4274ABEUA?

The MAX4274ABEUA supports fixed inverting gains from –0.25V/V to –100V/V and noninverting gains from +1.25V/V to +101V/V, with 54 standard values listed in Maxim's Gain Selection Guide. Gain is set at wafer sort via laser trimming of internal RF/RG resistors - no external components needed. The "AB" suffix denotes a specific gain version; exact gain value must be confirmed via the top-mark code or ordering guide, as MAX4274ABEUA itself is a family designation requiring gain-code completion (e.g., MAX4274AUEA for +5V/V).

Can the MAX4274ABEUA drive a 1000pF capacitive load?

The MAX4274ABEUA is guaranteed stable with capacitive loads up to 470pF without external compensation. Driving 1000pF directly may cause peaking or oscillation. To maintain stability, add a 50Ω–100Ω isolation resistor in series with the output - as shown in Maxim's Figure 9 - which decouples the load capacitance from the amplifier's feedback loop. This preserves phase margin while retaining signal fidelity for anti-aliasing or cable-driving applications.

Is the MAX4274ABEUA pin-compatible with other GainAmp devices like the MAX4174?

Yes, the MAX4274ABEUA shares the same SOT23-5 pinout and footprint as the MAX4174ABEUA and MAX4274 variants, including identical IN–, OUT, VCC, VEE, and IN+ terminal assignments. This allows direct board-level replacement in existing designs - provided the temperature range and gain version match system requirements. No PCB layout changes are needed, though designers should verify that the extended +125°C rating of MAX4274ABEUA does not introduce unintended thermal interactions in the host assembly.