With respect to the /CS pin on the AD7091, is this basically an output enable (e.g. can I always leave it on if I want to)?”
Can this pin be tied to ground indefinitely?
Any input or feedback is welcomed and appreciated!
I would not recommend tying /CS to ground. Aside from enabling the serial bus, /CS is used to frame data and it's logic level determines if a busy indicator is enabled. Idling it high would help achieve optimum static current consumption. It also has a role in the software reset which must be initiated after power up.Timing diagram for this software reset is shown in Figure 28 of the AD7091 datasheet.
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