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INA310B: Datasheet Error

Francis Jiang
Expert 4090 points

Part Number: INA310B

Hi Team,

Whether there is a error of figure 6-37? The Figure 6-40 and below table both show the tp is about 1us under 20mV OD condition, not 75ns.

image.png

image.png

Thanks.

BRs,

Francis

 

  • 0
    TI__Genius 9625 points

    Hello Francis,

    This may be a different interpretation of the spec, but I agree that this looks inconsistent. Allow me to check with the team and get back to you on this.

    Levi DV

  • +1 in reply to Levi DV
    TI__Genius 9625 points

    Hi Francis,

    I checked with the team and the spec in the electrical characteristics table includes the delay of the amplifier and the comparator, while the plot only includes the delay time from the comparator itself. So the datasheet is correct.

    Let me know if you have any more questions,

    Levi DV

  • 0 in reply to Levi DV
    Prodigy 10 points

    So you mean the amplifier and comparator have a 1µs delay, while the comparator only takes up about 75ns during the 20mV overshoot. In other words, the delay is mainly caused by the amplifier, right?

    Looking forward to your reply.

  • 0 in reply to Levi DV
    TI__Expert 4090 points

    Hi Levi,

    Thanks for your reply.

    The amplifier you mean is INA310B internal amplifier, the pre-signal of comparator's positive input? Could you please help share more details of tp test condition?

    BRs,

    Francis

  • +1 in reply to Francis Jiang
    TI__Genius 9625 points

    Hello,

    Yes I am talking about the internal amplifier causing most of the delay before the signal reaches the comparator's positive input, while the comparator itself only causes a delay of about 75ns. The test conditions are specified in the datasheet at the top of the electrical characteristics table, or above the typical characteristic plots.

    Let me know if you have any more questions,

    Levi DV