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MAX9923FEUB+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX9923FEUB+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 15 page General Description The MAX9922/MAX9923 ultra-precision, high-side cur- rent-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 unidirec- tional and bidirectional operation. For unidirectional operation, connect REF to GND. For bidirectional oper- ation, 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 mini- mum 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 tech- nique, 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 Notebook/Desktop Power Management Handheld Li+ Battery Current Monitoring Precision Current Sources 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 Ultra-Precision, High-Side Current-Sense Amplifiers ________________________________________________________________ Maxim Integrated Products 1 Ordering Information 19-4429; Rev 1; 1/10 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. + Denotes a lead(Pb)-free/RoHS-compliant package. EVALUATION KIT AVAILABLE PART PIN- PACKAGE TEMP RANGE GAIN (V/V) MAX9922EUB+ 10 µMAX -40°C to +85°C Adjustable MAX9923TEUB+ 10 µMAX -40°C to +85°C 25 MAX9923HEUB+ 10 µMAX -40°C to +85°C 100 MAX9923FEUB+ 10 µMAX -40°C to +85°C 250 Pin Configuration 1 2 3 4 5 10 9 8 7 6 VDD OUT FB REF N.C. RS- RS+ RSB MAX9922 MAX9923T MAX9923H MAX9923F µMAX TOP VIEW GND SHDN + Typical Operating Circuits appear at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc. |
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