SBAU416B November 2022 – January 2024 ADS9813
By default, the TSWDC155EVM provides the ADS9813EVM and ADS9817EVM with a 3.3-V supply ("3P3V"). The ADS9813EVM and ADS9817EVM both have a TPS61070 boost converter that boosts the 3.3-V supply to 5.4 V. By default, this voltage is applied to low-dropout regulators (LDOs) to derive the AVDD, DVDD, and IOVDD supplies when J18 is in the [1-2] position. U3 (TPS7A2050) provides the 5-V AVDD supply and U4 and U6 (TPS7A2018) provide the 1.8-V DVDD and IOVDD supplies, respectively. The LDO input voltage (LDO_IN) can be changed to an external source (5.2 V to 5.5 V) applied to terminal block J17 by placing a shunt on J18 in the [2-3] position. In this case U2 (LM66100), provides reverse polarity protection if the connection is wired incorrectly. Figure 5-1 shows the power tree schematic for the ADS9813EVM and ADS9817EVM.