AD9914 DAC calibration time

Question

Hi. I have a question about the DAC calibration time. 
 We use approx 2.4GHz system clock, this means DAC calibration is time is approx 200us. This means i have to wait at least 200us between enabling and disabling the DAC Cal bit, correct ? 
 Does this delay have an upper limit ? Since i control the chip via a PC interface the register access is quite slow, propably 100ms between enabling and disabling the DAC cal bit. Is this a problem ? 
 Cheers 
 Jan

Jules.Nikko · Accepted Answer

Hi jago , 
 That is correct. With a SYSCLK of approximately 2.4 GHz, the DAC calibration time is about 200 &micro;s, so the DAC CAL bit must remain asserted for at least that duration to ensure calibration completes successfully. 
 There is no specified maximum assertion time for the DAC CAL bit. Therefore, a delay of approximately 100 ms between setting and clearing the bit, due to the PC interface latency, is not expected to cause any issues, as it is significantly longer than the required calibration time. 
 All the best, 
 Jules)

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AD9914 DAC calibration time

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