Quick question. Is there a difference between the AD5421ACPZ and AD5421BCPZ chips? I've not been able to find any difference in the datasheet or the website. The only difference seems to be the price.
The B grade parts have better performance from the A grade parts. You can determine if the given specs is an A, B, or C grade by looking at the comments column of the specifications table. An example is shown below.
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