Analog Devices Inc./Maxim Integrated MAX4274CAESA

Overview

MAX4274CAESA from Maxim Integrated is a fixed-gain, rail-to-rail output operational amplifier in SOT23-5 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. It delivers 300µA quiescent current, 23MHz gain-bandwidth product at AV = +25V/V to +101V/V, and drives 1kΩ loads while maintaining DC precision - ideal for low-side current-sense amplification in portable instrumentation.

For engineers reviewing the MAX4274CAESA datasheet, MAX4274CAESA pinout, MAX4274CAESA application, or MAX4274CAESA equivalent, key selection considerations include confirmed noninverting gain configuration (+5V/V), SOT23-5 thermal and layout constraints, rail-to-rail output swing under 1kΩ load, and compatibility with single-supply systems requiring VCC/2 biasing (note: MAX4274CAESA lacks internal VCC/2 bias - use MAX4275 for that feature).

Technical Context

The MAX4274CAESA implements a decompen­sated op-amp core optimized for fixed noninverting gains (+1.25V/V to +101V/V), achieving up to 23MHz GBW at higher gains (e.g., +25V/V) - significantly exceeding unity-gain-stable alternatives. Its internal RF/RG network is laser-trimmed for 0.1% ratio accuracy, eliminating external resistor matching errors and PCB area.

Input stage includes back-to-back SCR structures and diode clamps enabling ±17V fault tolerance without phase reversal or excessive current draw (<3.5mA per input). The inverting input connects directly to RG, limiting its common-mode range to within supply rails, while the noninverting input accepts VEE to VCC – 1.2V.

Key Specifications

Pinout & Package

SOT23-5 surface-mount package (2.9mm × 1.6mm × 1.1mm), thermally enhanced for compact portable designs. Pin 1 marked via dot; standard JEDEC SOT23-5 footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4275CAESA, MAX4274CAESA provides identical performance except for missing internal VCC/2 bias - making it more flexible for DC-coupled use but requiring external biasing. Versus AD8220ARMZ, MAX4274CAESA trades CMRR and common-mode range for 75% lower supply current, 40% smaller footprint, and factory-guaranteed 0.1% gain accuracy without external components.

Availability

MAX4274CAESA is available at Aetrix Electronics and suitable for portable instrumentation, smart-card readers, and low-side current-sense applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4274CAESA 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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and consumer systems.

The MAX4274CAESA belongs to the GainAmp™ family of fixed-gain amplifiers, engineered to replace op-amp-plus-resistor configurations with integrated, laser-trimmed precision - targeting space-constrained, low-power signal conditioning in portable and battery-operated equipment.

FAQ

What is the exact gain setting of MAX4274CAESA?

The MAX4274CAESA is configured for noninverting fixed gain of +5V/V. This value is factory-laser-trimmed into the internal RF/RG resistor network and is guaranteed to ±0.1% accuracy across temperature. It cannot be reconfigured externally - the gain is hardwired and verified during production test.

Does MAX4274CAESA include internal VCC/2 biasing at the noninverting input?

No, MAX4274CAESA does not include internal VCC/2 biasing. That feature is exclusive to the MAX4275CAESA variant. For MAX4274CAESA, the IN+ pin requires external DC biasing (e.g., resistor divider or reference) in single-supply AC-coupled applications to establish proper operating point.

What is the maximum capacitive load MAX4274CAESA can drive without oscillation?

MAX4274CAESA is stable driving capacitive loads up to 470pF with no external isolation resistor. This is validated across process, voltage, and temperature. Loads exceeding 470pF require a series isolation resistor (e.g., 100Ω) between OUT and the load capacitance to maintain phase margin.

Can MAX4274CAESA operate from a 2.5V supply?

Yes, MAX4274CAESA is fully specified and functional from +2.5V to +5.5V single supply. At VCC = 2.5V, it maintains rail-to-rail output swing (within 150mV of rails into 1kΩ), 300µA supply current, and 0.1% gain accuracy - making it suitable for ultra-low-voltage battery systems.

Is MAX4274CAESA pin-compatible with other GainAmp devices in SOT23-5?

Yes, all GainAmp devices in SOT23-5 package - including MAX4174, MAX4175, MAX4274, MAX4275, and MAX4281 - share identical pinout (IN–, OUT, VCC, VEE, IN+). This allows direct substitution in existing layouts when changing gain or bias configuration, provided the application's input biasing and fault requirements align.