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TLV9062: How to calculate amplifier's supply current

Stanley Dai
Expert 5810 points
Part Number: TLV9062

Hi Team,

Here are three questions from customer needing your helps.

1. What's the meaning of "Channel separation, DC" in datasheet? You can also refer to below screenshot.

2. How to calculate amplifier's supply current under different load and supply voltage? Calculation formula is welcomed.

3. Does the voltage output swing from supply rails below regard to both V+ and V-?

Best Regards,

Stanley

  • Former Member
    0 Former Member

    Hi Stanley,

    Would you mind trying to re-attach your images?  The seem to have failed to properly attach and I cannot see them.  Then, I can better answer questions 1 and 3.

    Here is a great TIPL lecture on measuring power consumed.  You will want to use the data sheet plots to estimate the quiescent current of the part.  This is the current consumed always when the amplifier is turned on and no current is going to a load.  Any other current consumed is used to drive the load.  Let me know if this is unclear.

    Regards,

    Daniel

  • 0 in reply to Former Member
    TI__Expert 5810 points

    Hi Daniel,

    For question 1 and 3, please see below attachments. You can also search in datasheet about the key words "Channel separation, DC" and " voltage output swing "

    1. What's the meaning of "Channel separation, DC" in datasheet? You can also refer to below screenshot.

    2. Does the voltage output swing from supply rails below regard to both V+ and V-?

    Regards,

    Stanley

  • Former Member
    0 Former Member in reply to Stanley Dai

    Hello Stanley,

    Channel separation is a parameter used to determine how one channel affects another.  In other words, if the output of channel 1 changes, then the channel separation estimates how much you would expect channel 2 to change.  So if you have a 1V change at the output of channel 1, you would expect a typical 10uV change at the output of channel 2.

    For your second question the answer is "yes."  That specification is valid to both rails.

    Please let me know if you have any further questions.

    Regards,

    Daniel