Analog Devices Inc./Maxim Integrated MAX4174ADEUK-T

Overview

MAX4174ADEUK-T from Maxim Integrated is a single-channel, noninverting fixed-gain amplifier in SOT23-5 package, delivering +5V/V gain with 0.1% accuracy, rail-to-rail output swing, ±17V input fault protection, and 300µA supply current. It operates from +2.5V to +5.5V and targets low-side current-sense and portable instrument signal conditioning.

For engineers reviewing the MAX4174ADEUK-T datasheet, MAX4174ADEUK-T pinout, MAX4174ADEUK-T application, or MAX4174ADEUK-T equivalent, key selection criteria include guaranteed DC gain accuracy, capacitive-load stability up to 470pF, single-supply rail-to-rail operation, input overvoltage tolerance, and SOT23-5 footprint compatibility for space-constrained designs.

Technical Context

The MAX4174ADEUK-T integrates factory-laser-trimmed internal feedback resistors (RF/RG) to achieve precise +5V/V noninverting gain without external components. Its op-amp core is decompensated specifically for this gain setting, enabling a 23MHz GBW product and 330kHz –3dB bandwidth.

Input stage features back-to-back SCR structures and diode clamps with series resistors (RG at IN–, 5kΩ at IN+), allowing ±17V fault voltage tolerance without phase reversal or excessive current draw (<3.5mA). The noninverting input (IN+) is unbuffered and externally referenced, distinguishing it from the VCC/2-biased MAX4175 variant.

Key Specifications

Pinout & Package

SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, moisture sensitivity level 1 (MSL1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4174AEUK-T, the MAX4174ADEUK-T trades extended temperature rating for lower cost in commercial applications; compared with MAX4274AEUK-T, it provides half the channel count in the same footprint-ideal for minimizing component count where only one gain path is needed.

Availability

MAX4174ADEUK-T is available at Aetrix Electronics and suitable for portable instruments, smart-card readers, and low-side current-sense applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for MAX4174ADEUK-T 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer markets.

The MAX4174ADEUK-T belongs to the GainAmp™ family of fixed-gain amplifiers, designed to replace discrete op-amp-plus-resistor configurations with integrated, laser-trimmed precision in ultra-small packages for space- and power-sensitive signal chains.

FAQ

What is the exact gain configuration of the MAX4174ADEUK-T?

The MAX4174ADEUK-T is a noninverting fixed-gain amplifier with precisely trimmed +5V/V gain. This value is achieved using internal laser-trimmed RF and RG resistors, delivering 0.1% gain accuracy across temperature and supply voltage. Unlike the MAX4175 series, the MAX4174ADEUK-T does not include internal VCC/2 biasing at the noninverting input, making it suitable for DC-coupled applications where external reference control is required.

Does the MAX4174ADEUK-T support rail-to-rail input operation?

No, the MAX4174ADEUK-T does not support rail-to-rail input common-mode range. The IN− pin is connected to the internal RG resistor and must remain within the supply rails (VEE to VCC) to avoid distortion. The IN+ pin is a direct op-amp input with common-mode range extending from VEE to VCC − 1.2V. For true rail-to-rail input operation, consider the MAX4281 open-loop op amp instead.

Can the MAX4174ADEUK-T drive a 100pF capacitive load without oscillation?

Yes - the MAX4174ADEUK-T is stable with capacitive loads up to 470pF without requiring an isolation resistor. Its internal compensation is optimized for its +5V/V gain setting, ensuring robust phase margin even under heavy capacitive loading. This makes it ideal for driving ADC input filters, cable-connected sensors, or EMI-reduction networks directly from the output pin.

What is the maximum input overvoltage the MAX4174ADEUK-T can withstand?

The MAX4174ADEUK-T withstands ±17V applied to either IN+ or IN− input relative to VEE (ground in single-supply use), thanks to integrated back-to-back SCR structures and diode clamps with current-limiting resistors. Under such fault conditions, input current remains below 3.5mA, protecting both the device and upstream circuitry without phase reversal or latch-up.

Is the MAX4174ADEUK-T pin-compatible with other GainAmp devices in SOT23-5?

Yes - all MAX4174/MAX4175/MAX4274/MAX4275 variants share identical SOT23-5 pinout (IN−, OUT, VEE, VCC, IN+), enabling drop-in replacement across gain values and bias options. However, functional differences exist: MAX4174ADEUK-T has no internal VCC/2 bias, while MAX4175 variants do; MAX4274 variants are dual-channel. Always verify gain, bias, and channel count before substitution.