MAX9922

19-4429; Rev 0; 3/09 KIT ATION EVALU E L B AVAILA Ultra-Precision, High-Side Current-Sense Amplifiers 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 www.datasheet4u.com General Description MAX9922/MAX9923 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 highgain 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 ...