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TLV2186: input bias to +45°C

Ue
Genius 16565 points
Part Number: TLV2186

Hi all

My customer is evaluating the TLV2186 in an application where the operating temperature of the device will go to max +45°C and they have this question:

Can you provide more detailed data on the input bias current up to +45°C ? 

From figure 9 in the datasheet one cannot judge the range of the input bias at lower temperatures.

Best regards

Ueli

  • +1
    TI__Genius 9915 points

    Hi Ue,

    The input bias current specification is given in the electrical characteristics section of the datasheet.

    At 25°C, the typical IB specification is 0.1nA.

    The specification across temperature from -40°C to 85°C gives a maximum of 0.6nA.

    For your relatively moderate temperature of 45°C, the IB will be somewhere within this range.

    Figure 3 shows a typical distribution of TLV2186 IB measurements at 25°C.

    A good estimate is that the IB will double for every 10°C increase in temperature.

    Thanks,

    Zach

  • +1
    Guru 281010 points

    As a CMOS device, the TLV2186 does not require any input bias current; the specified bias currents are just leakage currents.

    In the graph above, the line is interpolated between the measurements at 25 °C and 85 °C. The actual leakage current at 45 °C will still be near zero. (There is no official specification.)

  • 0
    TI__Genius 9915 points

    Hi Ueli,

    Clemens is correct, the curve in the IB vs temp figure is interpolated from a few data points from a typical device. This figure shows that Ib increases exponentially over temperature and the significant ramp up occurs above 85°C.

    Regards,

    Zach

  • 0 in reply to Zach Olson
    TI__Genius 16565 points

    Hi Zach

    Thank you for pointing to the relevant datasheet sections, that does answer the question.

    ------------------

    Hi Clemens

    Thank you for the feedback.

    Best regards

    Ueli

  • 0 in reply to Ue
    TI__Genius 9915 points

    Hi Ueli,

    I'm happy to help, please let me know if you require further support.

    Regards,

    Zach