SBOA511A March   2021  – September 2021 INA209 , INA219 , INA220 , INA220-Q1 , INA226 , INA226-Q1 , INA228 , INA228-Q1 , INA229 , INA229-Q1 , INA230 , INA231 , INA232 , INA233 , INA234 , INA236 , INA237 , INA237-Q1 , INA238 , INA238-Q1 , INA239 , INA239-Q1 , INA260 , INA3221 , INA3221-Q1

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Defining Constraints
  4. 3 Find The Maximum Shunt Value
  5. 4 Find The Minimum Shunt Value
  6. 5 Maximum Resolution or Minimum Shunt Loss
  7. 6 What to Do if the Measurement Range Is Insufficient
  8. 7 Determine the Current LSB and Calibration Coefficient
  9. 8 Programming Your Device Registers
  10. 9 Summary
  11. 10Revision History

9 Summary

This application note shows a basic method for designing with a digital power monitor. Key specifications were discussed for determining shunt resistor range. Subsequently some insight was provided on how a shunt value can be tailored for resolution or power dissipation. After stressing the importance of the shunt, current range scaling was discussed along with programming registers.