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richardparkinson9
Visitor II
April 3, 2006
Question

ADC reference and temperature drift

  • April 3, 2006
  • 1 reply
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Posted on April 03, 2006 at 13:47

ADC reference and temperature drift

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    richardparkinson9Author
    Visitor II
    April 3, 2006
    Posted on April 03, 2006 at 13:47

    Hi,

    In the STR71x Reference Manual, it says that the Vcm and Vref voltages can be out by up to 5%, and that the resulting errors can be calibrated out by software.

    If I calibrate each chip once (at end of line test), what accuracy can I expect from the ADC? In other words, how much of the 5% error is due to variation between individual chips and how much is due to temperature variation, supply voltage and ageing?

    Thanks

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