MAX4377TAUA

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4377TAUA+ is a dual-channel high-side current-sense amplifier from the MAX4376/7/8 family, manufactured by Analog Devices (Maxim Integrated). It features an internal fixed voltage gain of +20 V/V and operates within a supply voltage range of +3V to +28V. The device provides buffered voltage outputs capable of driving up to 2mA into a ground-referenced load. It supports a common-mode input range from 0V to +28V, independent of the supply voltage, ensuring functionality during deep discharge conditions. The unit operates over the automotive temperature range of -40°C to +125°C with a typical supply current of 1mA per amplifier.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Provides buffered voltage output eliminating the need for external gain-setting resistors
• Supports high-side current monitoring with a common-mode range extending down to 0V
• Operates independently of supply voltage, maintaining feedback viability in deep discharge scenarios

Instrumentation, Op Amps, Buffer Amps Applications

• Notebook computers
• Cell phones
• Battery chargers
• Current-limited power supplies
• Automotive current detect systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing this component. Confirm that the part number includes the '+' designation for lead-free/RoHS compliance status. Ensure the selected variant matches the required dual-channel configuration and +20 V/V gain specification for your circuit design.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the MAX4377TAUA+ when a dual-channel solution is required for high-side current sensing. The +20 V/V gain is suitable for applications requiring higher output voltage swings relative to the sense resistor drop compared to the +50 or +100 V/V variants. Consider the 8-pin µMAX package for space-constrained designs where dual channels are necessary.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the MAX4376/MAX4377/MAX4378 series of precision high-side current-sense amplifiers. The MAX4377 specifically denotes the dual-channel version of the family, available in both SO-8 and µMAX-8 packages. The 'T' suffix identifies the tape-and-reel packaging format, while 'F' and 'H' suffixes denote alternative gain versions of +50 V/V and +100 V/V respectively.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct functional substitutes within the same family include MAX4377FAUA+ (+50 V/V gain) and MAX4377HAUA+ (+100 V/V gain), provided the system allows for adjustment of the external sense resistor value to accommodate the different gain factors.