MAX4377HASA

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4377HASA is a dual high-side current-sense amplifier with an internal gain of +100V/V. It operates on a single supply voltage ranging from +3V to +28V and features a common-mode input range of 0V to +28V, independent of the supply voltage. The device provides buffered voltage outputs capable of driving up to 2mA into a ground-referenced load. It offers a bandwidth of 1.2MHz at the +100V/V gain setting and maintains a typical full-scale accuracy of ±0.5%. The unit draws 1mA of supply current per amplifier and functions within an automotive temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• High-side current monitoring capability with a common-mode input range extending down to 0V, enabling operation even during deep battery discharge conditions.
• Integrated fixed gain of +100V/V eliminates the need for external precision gain-setting resistors, simplifying circuit design.
• Buffered voltage output stage provides sufficient drive current for direct connection to analog-to-digital converters or control loops.

Instrumentation, Op Amps, Buffer Amps Applications

• Battery chargers
• Notebook computers
• Current-limited power supplies
• Fuel gauges in PCs
• Automotive current detection

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix against official documentation to confirm package type and RoHS compliance status. Confirm that the 'H' designation corresponds to the required +100V/V gain for your application. Ensure the ordering code matches the dual-channel configuration required by your schematic. Cross-reference the manufacturer's latest datasheet revision to validate all electrical parameters before finalizing procurement.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a high gain of +100V/V is necessary to amplify small sense voltages for precise measurement. The dual-channel architecture allows simultaneous monitoring of two separate current paths within a compact footprint. Verify that the 1.2MHz bandwidth meets the dynamic response requirements of your control loop. Ensure the operating voltage remains within the specified 3V to 28V range for optimal performance.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the MAX4376/MAX4377/MAX4378 family of precision high-side current-sense amplifiers. The MAX4377 specifically denotes the dual-channel variant, offering two independent sensing channels in a single package. This family is designed for space-constrained applications requiring accurate current monitoring without interfering with the system ground path.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

MAX4377FAUA+ (Gain +50V/V)

Instrumentation, Op Amps, Buffer Amps FAQ

What is the function of the 'H' suffix in the MAX4377HASA?

The 'H' suffix indicates that the amplifier has a fixed internal voltage gain of +100V/V.

Can the MAX4377HASA monitor current when the common-mode voltage is near 0V?

Yes, the device features a common-mode input range of 0V to +28V, allowing it to function correctly even when connected to a battery pack in deep discharge.