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Is DAC Calibration in AD9914 neceassary?

Question asked by wangrui6268 on Aug 2, 2015
Latest reply on Aug 11, 2015 by wangrui6268

Hello!

 

I would like to use AD9914 as fast frequency hopping,and now I want to change REF CLK alternant (for example 3.3GHz and 3.5GHz alternant) for some reson.Of course, FTW is changing as well. From the datesheet,we know DAC calibration occurs when the REF CLK or internal system clock is changed.But the length of time to calibrate the DAC clock is very long (about 100 μs),and I want the frequency hopping is fast(about 50ns),so I wouldn't calibration the DAC output when the REF CLK changs alternant.Is that OK? and what will happen if I don't calibration the DAC output?

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