MAX4174BAEUK-T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4174BAEUK-T is a single-channel fixed-gain amplifier from the GainAmp family, housed in a 5-pin SOT23 package. It operates on a single +2.5V to +5.5V supply with a typical supply current of 300µA. The device features factory-trimmed internal gain-setting resistors providing 0.1% gain accuracy and includes an internal VCC/2 bias at the noninverting input. It offers rail-to-rail output capability, high-voltage fault protection up to ±17V, and stability with capacitive loads up to 470pF.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Integrates precision laser-trimmed internal gain-setting resistors for simplified design
• Includes internal VCC/2 biasing at the noninverting input for single-supply applications
• Features rail-to-rail outputs capable of driving 1kΩ loads
• Provides high-voltage fault protection withstanding ±17V at either input

Instrumentation, Op Amps, Buffer Amps Applications

• Portable Instruments
• Smart-Card Readers
• Infrared Receivers for Remote Controls
• Keyless Entry Systems
• Low-Side Current-Sense Amplifiers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific gain code corresponding to the 'B' suffix against the manufacturer's Gain Selection Guide, as this determines the exact amplification factor. Confirm that the SOT23-5 package and -40°C to +85°C temperature range align with your system requirements. Ensure compatibility with single-supply operation between +2.5V and +5.5V. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a compact solution with precise fixed gain is required without external feedback resistors. The internal VCC/2 bias simplifies AC-coupled single-supply designs by eliminating external bias networks. Consider the trade-off between bandwidth and gain, as higher gains offer reduced bandwidth despite decompensation. Verify that the input voltage range constraints do not conflict with signal levels, particularly for DC-coupled applications requiring the MAX4174 variant instead.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the Maxim Integrated GainAmp family, which combines low-cost rail-to-rail op amps with precision internal gain-setting resistors. The family includes open-loop unity-gain-stable versions (MAX428x) and fixed-gain variants (MAX417x/MAX427x). The MAX4174 series specifically provides fixed gains without internal bias, while the MAX4175 adds internal VCC/2 biasing. These devices are designed to replace discrete op-amp plus resistor gain blocks in space-constrained applications.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct replacements within the same package and functionality include other members of the MAX4174/MAX4175 family with different gain codes. For open-loop configurations, the MAX4281 serves as a compatible core component. Ensure any substitute maintains the SOT23-5 footprint and supports the required supply voltage range.