SBOSAD4 June 2024 INA4230
PRODUCTION DATA
Using values from Table 8-2, the maximum value of the shunt resistor is calculated based on the value of the maximum current to be sensed (IMAX) and the maximum allowable sense voltage (VSENSE_MAX) for the chosen ADC range. When operating at the maximum current, the differential input voltage must not exceed the maximum full scale range of the device, VSENSE_MAX. Using Equation 6 for the given design parameters, the maximum value for RSHUNT is calculated to be 8.192mΩ. The closest standard resistor value that is smaller than the maximum calculated value is 8.0mΩ. Smaller resistors can be used to minimize power loss at the expense of reduced accuracy. The shunt resistor selected must have sufficient wattage to handle the power dissipation at maximum load at the desired operating temperature.