INA3221 detect direction

Hugo Wang

Expert 1525 points

Other Parts Discussed in Thread: INA3221

Hi Sir：

I have two questions about INA3221 detect direction.

1. Can the INA3221 detect reverse direction as followings？

2. If it can detect reverse direction, how about detect mode？Does It use serial data SDA 010101？

Thank you for your support.

over 10 years ago

0 Rabab Itarsiwala over 10 years ago

TI__Expert 4595 points

Hi Hugo,

INA3221 can detect bidirectional current upto 163.8 mV of shunt drop in either direction.

Can you elaborate on your second question.

0 Hugo Wang over 10 years ago in reply to Rabab Itarsiwala

Expert 1525 points

Hi Rabab：
How to we know to detect reverse direction？ Can we know from I2C address？
Thank you for your support.

0 Rabab Itarsiwala over 10 years ago in reply to Hugo Wang

TI__Expert 4595 points

Hi Hugo,
The sign bit D15 of the shunt register will indicate a reverse current. Please refer to the register detail section to learn about the shunt register.

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INA3221 detect direction