my next design will use the converter AD9691. I am wondering now whether a power-up sequence for the supplies (AVDD1, AVDD2, AVDD3 ...) is needed? The datasheet currently give no further information.
Thanks and best regards,
There is no power-up sequence required for the AD9691. There is an internal power on reset (POR) circuit that holds the AD9691 in a reset mode until all the supplies are at their required level. Once all the supplies are at their required levels, the POR circuit releases the reset and the AD9691 is ready to work. However, if at this point there is no clock detected by the AD9691, the AD9691 goes into a low power mode. In order to recover from the low power mode, it is recommended to do a datapath soft reset (0x001 = 0x02) after the clock is applied.
Thanks for your help!
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