INA210 datasheet(20/39 Pages) TI1

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Max_Current=Current_LSB

32767

Max_Current=0.06226

Max_ShuntVoltage=Max_Current_Before_Overflow

SHUNT

Max_ShuntVoltage=0.3113

MaximumPower=Max_Current_Before_Overflow

BUS_MAX

MaximumPower=1.992

Corrected_Full_Scale_Cal=trunc

Cal

MeasShuntCurrent

INA220_Current

Corrected_Full_Scale_Cal=3462

INA220

SBOS459D – JUNE 2009 – REVISED SEPTEMBER 2010

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7. Compute the maximum current and shunt voltage values (before overflow), as shown by Equation 15 and

Equation 16. Note that both Equation 15 and Equation 16 involve an If - then condition.

(15)

If Max_Current

≥ Max Possible_I then

Max_Current_Before_Overflow = MaxPossible_I

Else

Max_Current_Before_Overflow = Max_Current

End If

(Note that Max_Current is less than MaxPossible_I in this example.)

Max_Current_Before_Overflow = 0.06226 (Note: This result is displayed by software as seen in Figure 21.)

(16)

If Max_ShuntVoltage

≥ VSHUNT_MAX

Max_ShuntVoltage_Before_Overflow = VSHUNT_MAX

Else

Max_ShuntVoltage_Before_Overflow= Max_ShuntVoltage

End If

(Note that Max_ShuntVoltage is less than VSHUNT_MAX in this example.)

Max_ShuntVoltage_Before_Overflow = 0.3113 (Note: This result is displayed by software as seen in

Figure 21.)

8. Compute the maximum power with equation 8.

(17)

9. (Optional second calibration step.) Compute the corrected full-scale calibration value based on measured

current.

INA220_Current = 0.06226

MeaShuntCurrent = 0.05

(18)

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