7.3.11 1.8 V to 5.5 V Logic Interface

All digital input and output pins are compatible with any logic supply voltage between 1.8 V and 5.5 V. Connect the interface logic supply voltage to the IOV_DD pin. Although timing is specified down to 2.7 V (see the Timing Characteristics), IOV_DD can operate as low as 1.8 V, but with degraded timing and temperature performance. For the lowest power consumption, logic V_IH levels should be as close as possible to IOV_DD, and logic V_IL levels should be as close as possible to GND. Note that the DAC8881 core internal digital logic operates from the same voltage as the 2.7V to 5.5V AV_DD supply, so the DV_DD pin must also be connected to the AV_DD supply voltage.