Issue
I am currently consistently getting 235% of the output voltage compared with what is expected using an INA250A4 and an INA250A2.
For example, using the INA250A4, with a current of 0.5A, the output is 2.35V which correlates to a reading of 1.18A. The same multiplication of expected output occurs with other currents passed through:
| Voltage | Ohms | Expected output V | Actual output V | Expected Analog | Actual Analog | Calculated Amps | Actual Amps | % |
| 12.00 | 14.10 | 1.70 | #VALUE! | 2112.19 | N/A | 0.85 | #VALUE! | |
| 12.00 | 24.00 | 1.00 | 2.35 | 1240.91 | 2920.00 | 0.50 | 1.18 | 235.31% |
| 12.00 | 38.10 | 0.63 | 1.47 | 781.68 | 1830.00 | 0.31 | 0.74 | 234.11% |
| 4.46 | 14.10 | 0.71 | 1.48 | 880.08 | 1840.00 | 0.32 | 0.74 | 234.39% |
| 4.56 | 24.00 | 0.42 | 0.89 | 517.05 | 1100.00 | 0.19 | 0.44 | 233.28% |
| 4.60 | 38.10 | 0.26 | 0.56 | 325.70 | 700.00 | 0.12 | 0.28 | 233.61% |
The amperage has been checked and matches the calculated values in the table above as the entire system consumes only ~0.4A in addition to the load circuitry.
INA250 Implementation
Thanks,
Dean
