• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 544 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

INA226 Question

Adam Stewart
Prodigy 10 points
Other Parts Discussed in Thread: INA226

Hi.

I am trying to use an INA226 to sense current up to 60 amps. I have programmed the configuration data as per the datasheet but I am not getting any readings above 32.767 amps. The shunt voltage is always at it's maximum 0x7FFF. I am using four 0.01 ohm resistors in parallel (0.0025 ohm) as a shunt. 

The configuration values I am using are:

CAL: 0x0400

Current LSB: 0.002

I am sure of the configuration values I obtained as the sensor works perfectly below 32.767 amps.

Am I just missing something with regards to the configuration, do I need a different shunt resistor or can this sensor not read about 32.767 amps?

Any advice would be greatly appreciated.

Thanks.

  • 0
    TI__Expert 4595 points

    Hi Adam,

    The maximum input sense voltage limit for INA226 is 81.92 mV and so you are at the maximum input with current = 32.768 A (81.92 mV / 0.0025 ohm). For 60 A full scale you will have to reduce the shunt resistor to half. Please let me know if you have questions.