Other Parts Discussed in Thread: LMX2572
We refer to Figures 19 and 20 in the LMX2572EVM Evaluation Instructions to design the module with the LMX2572. Could you give us some advice on the following?
(1) In Figure 20, there are 12kΩ resistors in series on the control lines of SYNC, SCK, SDI, etc. Is this ESD protection? Are these necessary?
(2) When the ramping function and SYSREF are not used, is it OK to ground RampClk, RampDir, and SysRefReq pins directly, or should a resistor be added like Figure 20?