Frequently Asked Question
Is there a power up sequence I should follow?
Yes, it is good practice to power VDD first and VSS second. The order of VA, VB, and VW is not important but they should be powered last. There are ESD protection diodes between the VDD and the A, B, and W terminals. For example, the cathode of one of the diodes connects to VDD and the anode connects to the A terminal. As a result, any voltage occurring at the A terminal before VDD will forward bias the diode and power the VDD. For AD5231/AD5232/AD5233/AD5235 only, the digital signals should also be powered after VDD. Please refer to datasheets for additional information regarding digital signal sequence.