MAX4377FASA-T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4377FASA-T is a dual high-side current-sense amplifier with an internal gain of +50V/V. It operates on a single supply voltage ranging from +3V to +28V and supports an input common-mode range of 0V to +28V, independent of the supply voltage. The device features a bandwidth of 1.7MHz at this gain setting and draws 1mA of supply current per amplifier. It provides buffered voltage outputs capable of driving up to 2mA into a ground-referenced load. The unit is housed in an 8-pin SOIC package and is rated for operation across an automotive temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• High-side current monitoring capability with a 0V to +28V common-mode input range that remains functional even during deep battery discharge conditions.
• Integrated fixed gain of +50V/V eliminates the need for external gain-setting resistors, simplifying circuit design.
• Buffered output stage provides sufficient drive strength to interface directly with analog-to-digital converters or control loops.

Instrumentation, Op Amps, Buffer Amps Applications

• Notebook computers
• Cell phones
• Current-limited power supplies
• Battery chargers
• Portable/battery-powered systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm the part status as obsolete or active through official manufacturer channels before finalizing procurement plans. Ensure the ordering information matches the required gain version and package type for the intended application.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a dual-channel solution is required for high-side current sensing in space-constrained designs. The +50V/V gain is suitable for applications requiring moderate amplification without external resistor networks. Verify that the 1.7MHz bandwidth meets the system's dynamic response requirements and that the 8-pin SOIC footprint aligns with the PCB layout constraints.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the MAX4376/MAX4377/MAX4378 family of precision high-side current-sense amplifiers. The MAX4377 specifically denotes the dual-channel variant within this series. Other members include the single-channel MAX4376 and the quad-channel MAX4378. All variants share similar electrical characteristics but differ in channel count and package options.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes within the same family include MAX4377TAUA+ (gain +20V/V) and MAX4377HAUA+ (gain +100V/V). These parts maintain identical pinouts and functionality but offer different internal gains. Verify that the alternative gain factor aligns with the system's full-scale output voltage requirements.