Hello,
I'll be using the AD7490 on a shared SPI bus. Some of the SPI devices on the bus, including the AD7490 could be individually powered down. Will the SClk and Din pins be safely high impedance when Vdd is 0V?
Dout will have a tri-state buffer on it that enabled the output when the CS line is low.
Perhaps there are ESD protection diodes on these inputs that will then clamp SClk and Din to ground ?
Thanks for the help,
Adam