MAX4128ESA

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4128ESA is a dual-channel, wide-bandwidth operational amplifier from the MAX4122–MAX4129 family. It features rail-to-rail input and output stages, enabling operation with single supplies from +2.7V to +6.5V or dual supplies of ±1.35V to ±3.25V. This decompensated device offers a 25MHz gain-bandwidth product and is stable at closed-loop gains of 10V/V or greater. It draws only 650µA per amplifier and can drive loads as low as 250Ω.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Rail-to-Rail Input and Output Stages
• Wide Bandwidth Operation
• Low Power Consumption
• High Capacitive Load Stability

Instrumentation, Op Amps, Buffer Amps Applications

• Data-Acquisition Systems
• Signal Conditioning
• Portable Equipment
• Battery-Powered Instruments

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'ESA' corresponds to the SO-8 package and -40°C to +85°C temperature range. Confirm that the application circuit maintains a minimum closed-loop gain of 10V/V to ensure stability, as this is a decompensated amplifier. Ensure supply voltages remain within the specified 2.7V to 6.5V limits for proper operation.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the MAX4128ESA when high speed and precision are required in low-voltage environments. Its decompensated nature allows for higher bandwidth compared to unity-gain stable counterparts, provided the gain requirement is met. The dual configuration saves board space while maintaining low power consumption suitable for battery-operated devices.

Instrumentation, Op Amps, Buffer Amps Part Context

Part of the MAX4122–MAX4129 series offering rail-to-rail I/O op amps. The MAX4128 specifically provides dual channels with a 25MHz GBW, distinguishing it from the 5MHz variants. It shares the family's low quiescent current and high capacitive load tolerance characteristics.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Other members of the MAX4122–MAX4129 family may serve as substitutes if channel count and gain requirements align. Verify that any replacement matches the 25MHz bandwidth and decompensated stability profile.