General Description

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.

Features

♦ 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

Applications

    Notebook/Desktop Power Management

    Handheld Li+ Battery Current Monitoring

    Precision Current Sources