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Why do the AD7606 pins in the "Typical Connection Diagram" such as RANGE, /STDBY have resistors and what values should they be?

Why do pins RANGE, STBY, REFSEL, SER/PAR have resistors and what values should
these resistors have?


These pins are all digital input pins and the resistors act as
pull-up/pull-down resistors, in order to pull the logic inputs to the required
level. A value of 1Kohm should be enough for these resistors.