Precision op-amp for sensor front-ends and DC-critical loops
The Maxim Integrated MAX4238AUT/V+T is a single-channel, general-purpose operational amplifier built for applications where DC accuracy matters more than bandwidth. Its 0.1 µV input offset voltage and 1 pA input bias current make it a natural fit for precision sensor conditioning — thermocouple amplifiers, strain-gauge bridges, photodiode transimpedance stages, and medical instrumentation front-ends. The rail-to-rail output stage swings within millivolts of both supply rails, which preserves dynamic range in low-voltage, single-supply designs running from 2.7 V to 5.5 V.
What the key ratings mean for the BOM
The 0.1 µV offset eliminates the need for external nulling circuits or software calibration in many DC-coupled paths. The -40°C to 125°C operating range covers automotive under-hood and industrial environments. If your BOM calls for a precision op-amp that holds its offset across temperature without a trim pot, this part fits. The SOT-23-6 package keeps the footprint small — useful when the op-amp shares a board with dense passives or an MCU.
Lifecycle and sourcing reality
The MAX4238AUT/V+T carries an Active lifecycle status and is ROHS3 compliant. There is no end-of-life notice or last-time-buy window on this part. For BOM planning, this means no forced redesign from obsolescence in the near term.