I am working with AD9763 DVDD=AVDD=3.3V.
I would like to drive the digital inputs (CLK, WRT, DB) with 2.5V pins from FPGA (the VOH Min of the FPGA is 2V). According to the AD9763 datasheet "Logic 1 Voltage @ DVDD1 = DVDD2 = 3.3 V is 2.1V" but is also gives typical of 3V. On page 25 (Rev F) it says "VTHRESHOLD = DVDDx/2(±20%)" = 1.98V.
So which Vin threshold is true? 1.98V or 2.1V or 3V?