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ADC10080: Vcom voltage variation and temp drift

user5163865
Genius 3940 points
Part Number: ADC10080

Hi,

Our customer has the following questions. Does TI have any information?
1. Vcom variation at room temperature, histogram.
2. Vcom temperature drift
The datasheet says "not tested", please let me know if you have any data.
Best regards,
Hiroshi
  • 0
    Genius 3940 points
    I'm sorry. This pin is an input PIN as far as I can see the data sheet.
    I will explain to the customer.
  • 0 in reply to user5163865
    Genius 3940 points
    Sorry for getting confused.
    According to D/S,
    VCOM PIN
    This pin supplies a voltage for possible use to set the common mode input voltage. This pin may also be
    connected to VIN-, so that VIN+ may be used as a single ended input. This pin should be bypassed with at least a
    0.1 uF capacitor. Do not load this pin.
    Is Vcom = 1.45V output?
    Does TI have any information?
    1. Vcom variation at room temperature, histogram.
    2. Vcom temperature drift
    Vcom depends on internal REF (80ppm), so I think it is more error, but is it correct?
    best regards,
    Hiroshi
  • 0 in reply to user5163865
    TI__Genius 12780 points

    Hi Hiroshi,

    We do not have any additional data plots / information on this device. As you have pointed out, with the internal 1.2V VREF, there is +/- 80 ppm/C. I believe that if a more stable external reference is used, the VOCM will, in turn, be more stable. However, I don't have the data to support this claim.

    Best Regards,

    Dan

  • 0 in reply to dBrock
    Genius 3940 points

    Hi Dan,

    Thank you for your reply.
    I posted another thread because of an additional question from my customer.
    I understand that there is no data for the questions.
    Best Regards,

    Hiroshi