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Forum Post: RE: ADS1281 Timing

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Hello Chris,


Thank you for all your answers and explanations, below are my comments and follow up questions.

About Ans1- you answered my question, thank you!

About Ans2- Allow me to explain you my interpretation of your answer to Q2. If an analog signal presents itself at the input at (t=0) its settled digital equivalent will present itself after the 62nd /DRDY pulse ~ 1sec later. 

Q4.How much off is the value at the digital output at the 1st /DRDY, 2nd /DRDY..... pulse?

About Ans3- Just to make sure, you mean the external clock that I am applying to the RESET pin. Should be 62.5Hz X N (N =1,2,3,....).

Response to your comments;

In our application the ADS1281 will be controlled with an FPGA in a state machine configuration, causing us to choose the PINMODE configuration for the ADS1281. 

Q5. Regarding your screenshot comment, please explain, in PINMODE, which clock input (CLK or SCLK or /RESET) generates directly or indirectly the /DRDY output?

Thanks again,

AD


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