SBAS713C May 2015 – January 2017 ADS54J69
PRODUCTION DATA.
The device requires a 1.15-V nominal supply for IOVDD, a 1.9-V nominal supply for DVDD, a 1.9-V nominal supply for AVDD, and a 3.0-V nominal supply for AVDD3V. For detailed information regarding the operating voltage minimum and maximum specifications of different supplies, see the Recommended Operating Conditions table.
Figure 137 shows the suggested power-up sequencing for the device. Note that the 1.15-V IOVDD supply must rise before the 1.9-V DVDD supply. If the 1.9-V DVDD supply rises before the 1.15-V IOVDD supply, then the internal default register settings may not load properly. The other supplies (the 3-V AVDD3V and the 1.9-V AVDD), can come up in any order during the power sequence. The power supplies can ramp up at any rate and there is no hard requirement for the time delay between IOVDD ramp up to DVDD ramp-up (can be in orders of microseconds but is recommend to be a few milliseconds).