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INA381-Q1: Leakage current of Digital inputs over full operating temperature range

Manoj Turpati
Intellectual 280 points
Part Number: INA381-Q1

Tool/software:

Hello TI Support Team,

We are currently evaluating the INA381-Q1 and noticed that the datasheet specifies a nominal leakage current of 1µA at 25°C for the digital inputs. However, we would appreciate it if you could confirm the expected leakage current behavior for the digital inputs (specifically the RST pin) over temperature, particularly at elevated temperatures such as 125°C.

While we understand that you cannot guarantee leakage current values beyond the specified values, it would be helpful if you could confirm whether a maximum leakage current of 10µA at 125°C is a conservative approach. This confirmation would assist us in our design and ensure that our calculations for the expected performance margin are aligned with the device's characteristics.

Thank you for your assistance, and we look forward to your response.

Best regards,

Manoj.

  • 0
    TI__Expert 7300 points

    Hi Manoj,

    We unfortunately don't test leakage current at 125C, so there's no way to confirm your ask.

    Best,
    Mallika Senthil

  • 0 in reply to Mallika Senthil
    Intellectual 280 points

    Hello Mallika,

    Thank you for your response.

    As the datasheet specifies a typical input leakage current of 1 µA at 25°C, and no data is available for higher temperatures, we would like to use a value of 10 µA at 125°C would be a reasonable and conservative assumption for our analysis.

    Could you please confirm whether this estimate aligns with your internal characterization, or advise if a more appropriate value should be considered for worst-case conditions?

    We appreciate your support.

    Best regards,

    Manoj.

  • 0 in reply to Manoj Turpati
    TI__Expert 7300 points

    Hi Manoj,

    I've asked our designers to simulate this, it will take a few weeks to get the data. But if that's too long a wait time, as an unofficial answer, 10uA is a safe estimate for worst case scenarios.

    Best,
    Mallika Senthil