MAX4378HASD+

Instrumentation, Op Amps, Buffer Amps Overview

The MAX4378HASD+ is a quad high-side current-sense amplifier from the Analog Devices/MAXIM MAX437x family. It features an internal fixed gain of +100V/V, providing buffered voltage outputs that eliminate external gain-setting resistors. The device operates with a supply voltage range of +3V to +28V and supports a common-mode input range of 0V to +28V, independent of the supply voltage. It draws 1mA of supply current per amplifier and offers a bandwidth of 1.2MHz at the +100V/V gain setting. The component is housed in a 14-pin SOIC package and is qualified for the automotive temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Quad-channel architecture with integrated +100V/V fixed gain
• High-side sensing capability with 0V to +28V common-mode range
• Buffered output stage capable of driving up to 2mA into ground-referenced loads
• Automotive-grade qualification supporting extended temperature environments

Instrumentation, Op Amps, Buffer Amps Applications

• Battery chargers and smart battery packages
• Current-limited power supplies
• General-system and board-level current monitoring
• Fuel gauges in personal computers
• PA bias control in portable systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and RoHS compliance status. Ensure the selected variant matches the required channel count and gain configuration for the target application. Cross-reference the manufacturer's latest datasheet revision to validate pinout assignments and absolute maximum ratings before finalizing procurement specifications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this part when a four-channel solution is required for high-side current monitoring. The +100V/V gain is optimal for detecting small sense voltages across low-value shunt resistors. Consider the 14-pin SOIC footprint constraints during PCB layout. Verify that the system's load current does not exceed the thermal dissipation limits defined for the chosen package style under expected ambient conditions.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the MAX4376/MAX4377/MAX4378 series of precision current-sense amplifiers. While the MAX4376 provides single-channel and MAX4377 dual-channel configurations, the MAX4378 specifically integrates four independent amplifiers within a single package. All variants share identical electrical characteristics regarding bandwidth, supply operation, and common-mode voltage handling, differing only in channel density and physical package dimensions.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct functional substitutes within the same family include MAX4378TASD+ (Gain +20V/V) and MAX4378FASD+ (Gain +50V/V). These parts maintain the same 14-pin SOIC footprint and electrical interface but utilize different internal gain settings.