MAX9923FEUB+T

Instrumentation, Op Amps, Buffer Amps Overview

The MAX9923FEUB+T is an ultra-precision, high-side current-sense amplifier in a 10-pin µMAX package. It features a fixed gain of 250 V/V and supports bidirectional or unidirectional operation via the REF pin. The device operates from a +2.85V to +5.5V single supply with a common-mode voltage range of +1.9V to +28V. Key electrical specifications include a maximum input offset voltage (VOS) of ±10µV over temperature, ±0.8% maximum gain accuracy, and a -3dB bandwidth of 2.5kHz. Quiescent supply current is 700µA, reducing to less than 1µA in shutdown mode.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low input offset voltage of ±10µV maximized for precision measurements
• Fixed internal laser-trimmed gain of 250 V/V ensuring ±0.8% accuracy
• Bidirectional capability allowing simultaneous charge and discharge monitoring
• Spread-spectrum autozeroing technique eliminates drift and 1/f noise

Instrumentation, Op Amps, Buffer Amps Applications

• Notebook and desktop power management systems
• Handheld Li-ion battery current monitoring
• Precision current sources

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix FEUB+T corresponds to the fixed 250 V/V gain variant within the MAX9923 family. Confirm RoHS compliance status as indicated by the plus sign. Ensure the ordering code matches the 10-pin µMAX package requirement. Cross-reference the manufacturer's latest datasheet for any potential revisions to the functional diagram or absolute maximum ratings before finalizing procurement.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high gain is required to amplify small differential sense voltages without external resistors. The fixed 250 V/V gain suits applications where minimal full-scale sense voltage is critical. Consider the bidirectional output feature if monitoring both charging and discharging currents is necessary. Verify that the 2.5kHz bandwidth meets the system's dynamic response requirements.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the MAX9922/MAX9923 series of ultra-precision current-sense amplifiers. While the MAX9922 offers adjustable gain, the MAX9923 variants provide fixed gains. The 'F' suffix specifically designates the 250 V/V gain option, distinguishing it from the T (25 V/V) and H (100 V/V) versions. All share the same package and extended temperature range specifications.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes within the same family include MAX9923TEUB+T (25 V/V gain) and MAX9923HEUB+T (100 V/V gain). These parts share identical pinouts and packages but differ in fixed gain values. Designers must ensure the system can accommodate the different amplification factors if swapping between these variants.