MAX9923HEUB+T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX9923HEUB+T is an ultra-precision, high-side current-sense amplifier in a 10-pin µMAX package. It features a fixed gain of 100V/V and an input common-mode voltage range of +1.9V to +28V, independent of the supply voltage. The device operates from a single +2.85V to +5.5V supply with a quiescent current of 700µA. Key electrical characteristics include a maximum input offset voltage (VOS) of ±20µV over temperature and a full-scale gain accuracy better than ±0.5%. It supports both unidirectional and bidirectional operation.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low input offset voltage of ±20µV (max) maintained over the extended temperature range
• Laser-trimmed internal resistor providing a fixed gain of 100V/V with ±0.5% accuracy
• Spread-spectrum autozeroing technique eliminates drift and 1/f noise effects
• Bidirectional or unidirectional sensing capability via the REF pin configuration

Instrumentation, Op Amps, Buffer Amps Applications

• Notebook and desktop power management systems
• Handheld Li-ion battery current monitoring for charge and discharge cycles
• Precision current sources requiring high accuracy at small sense voltages

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix HEUB corresponds to the 100V/V gain variant within the MAX9923 family. Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering code matches the required temperature range and package type for your design specifications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high precision is required for high-side current sensing with minimal sense voltage drop. The fixed 100V/V gain suits applications needing moderate amplification without external resistors. Consider the bidirectional mode if monitoring both charging and discharging currents is necessary.

Instrumentation, Op Amps, Buffer Amps Part Context

Part of the MAX9922/MAX9923 series of ultra-precision current-sense amplifiers. The MAX9923H variant specifically offers a fixed gain of 100V/V, distinguishing it from the adjustable MAX9922 and other fixed-gain variants like the MAX9923T (25V/V) and MAX9923F (250V/V). All share the same µMAX package and low-power architecture.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct functional substitutes within the same family include MAX9923TEUB+ (25V/V gain) and MAX9923FEUB+ (250V/V gain), provided the gain difference is acceptable. The MAX9922EUB+ serves as a substitute if adjustable gain via external resistors is preferred.