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High quiscent current in power down mode

Etienne Droniou
Prodigy 130 points
Part Number: INA219

Hi everyone, 

I work with a custom board with an INA219 on it. 

My problem is that we work on low power (58µA) but when we put the INA219 in power down mode the current consumption rise up to 81µA. 

According to the datasheet, the quiescent current in power down mode is 6µA typ and 15µA max.

I'm wondering why I have 20µA insteed of the 6µA of the datasheet.

Thank you in advance for your response.

Etienne

  • 0
    TI__Mastermind 32395 points

    Hello Etienne,

    Thank you for posting your question. What you are describing is certainly not correct behavior. Would you please share some details about:

    1. What is the current consumption when INA219 is not in power-down mode?

    2. How are you measuring current consumption? Is the 81uA current measurement going into the supply pin, thus this is IQ, or is the measurement of the input bias current (IB)? Where and how are you measuring the current consumption of INA219?

    3. Are you able to communicate with the device during power-on operation and get expected load current readings? 

    Sincerely,

    Peter