MAX4038EUA+

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4038EUA+ is a dual-channel, low-bias operational amplifier manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +1.4V to +3.6V supply and consumes only 800nA of supply current per amplifier. The device features rail-to-rail outputs capable of driving 5kΩ loads to within 25mV of the rails. Key electrical parameters include a typical input bias current of 1.0pA, an input offset voltage of ±200µV, and a gain-bandwidth product of 4kHz. It is housed in an 8-pin µMAX package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low supply current consumption of 800nA per amplifier for extended battery life
• Rail-to-rail output stage drives loads to within millivolts of supply rails
• Extremely low input bias current of 1.0pA (typical) minimizes loading effects
• No phase reversal occurs for overdriven inputs

Instrumentation, Op Amps, Buffer Amps Applications

• Battery-powered and solar-powered systems
• Portable medical instrumentation
• Micropower thermostats and potentiostats
• Electrometer amplifiers
• Remote sensor amplifiers

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'EUA+' corresponds to the lead-free/RoHS-compliant version in the 8-pin µMAX package with a -40°C to +85°C temperature range. Confirm that the ordering information matches the exact pinout and functional requirements for your design, as other variants in the family may include internal references or different packages.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when ultra-low quiescent current is critical alongside precision requirements. The MAX4038EUA+ provides two independent channels without an internal reference, distinguishing it from the MAX4039. Ensure the application can tolerate the 4kHz gain-bandwidth product and that the 1.4V minimum supply voltage aligns with the system's power architecture.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the MAX4036–MAX4039 family of low-IBIAS, rail-to-rail operational amplifiers designed for single-supply operation. While the MAX4036 and MAX4038 lack internal references, the MAX4037 and MAX4039 integrate a 1.232V buffered reference. The MAX4038 specifically offers dual-channel performance in compact surface-mount packages like the µMAX.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes within the same family include the MAX4038AAUA+ for an extended temperature range (-40°C to +125°C). Other package options such as TDFN or UCSP are available under different part numbers (e.g., MAX4038ETA-T). Verify that any replacement maintains the required 800nA supply current and 1.0pA input bias current specifications.