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Data Sheet Rev. 1
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Overview

Features and Benefits

  • Ultra-Precision VOS Over Temperature
    • MAX9922: ±10µV (max)
    • MAX9923T: ±25µV (max)
    • MAX9923H: ±20µV (max)
    • MAX9923F: ±10µV (max)
  • ±0.5% (max) Full-Scale Gain Accuracy
  • Bidirectional or Unidirectional ISENSE
  • Multiple Gains Available
    • Adjustable (MAX9922)
    • +25V/V (MAX9923T)
    • +100V/V (MAX9923H)
    • +250V/V (MAX9923F)
  • 1.9V to 28V Input Common-Mode Voltage, Independent of VDD
  • Supply Voltage: +2.85V to +5.5V
  • 700µA Supply Current, 1µA Shutdown Current
  • Extended Temperature Range (-40°C to +85°C)
  • Available in Space-Saving 10-Pin µMAX

Product Details

The MAX9922/MAX9923 ultra-precision, high-side current-sense amplifiers feature ultra-low offset voltage (VOS) of 25µV (max) and laser-trimmed gain accuracy better than 0.5%. The combination of low VOS and high-gain accuracy allows precise current measurements even at very small sense voltages.

The MAX9922/MAX9923 are capable of both unidirectional and bidirectional operation. For unidirectional operation, connect REF to GND. For bidirectional operation, connect REF to VDD/2.

The MAX9922 has adjustable gain set with two external resistors. The MAX9923T/MAX9923H/MAX9923F use an internal laser-trimmed resistor for fixed gain of 25V/V, 100V/V, and 250V/V, respectively. The devices operate from a +2.85V to +5.5V single supply, independent of the input common-mode voltage, and draw only 700µA operating supply current and less than 1µA in shutdown.

The +1.9V to +28V current-sense input common-mode voltage range makes the MAX9922/MAX9923 ideal for current monitoring in applications where high accuracy, large common-mode measurement range, and minimum full-scale VSENSE voltage is critical.

The MAX9922/MAX9923 use a spread-spectrum autozeroing technique that constantly measures and cancels the input offset voltage, eliminating drift over time and temperature, and the effect of 1/f noise. This, in conjunction with the indirect current-feedback technique, achieves less than 25µV (max) offset voltage.

The MAX9922/MAX9923 are available in a small 10-pin µMAX® package and are specified over the -40°C to +85°C extended temperature range.

Applications

  • Handheld Li+ Battery Current Monitoring
  • Notebook/Desktop Power Management
  • Precision Current Sources

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Evaluation Kits (1)

Documentation & Resources

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  • Data Sheets (1)
  • Reliability Data (1)
  • Technical Articles (5)
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    Tools & Simulations

    SPICE Models

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    MAX9922EUB+ Material Declaration Reliability Data 10-MINI_SO-N/A
    MAX9922EUB+T Material Declaration Reliability Data 10-MINI_SO-N/A
    Wafer Fabrication Data MAX9922 Reliability Data

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    MAX9922 Ask your question »
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