Analog Devices ADRV9001 User Manual page 288

Reference Manual
POWER-SUPPLY RECOMMENDATIONS
Evaluation Board Power-Supply Overview
Figure 269 outlines the power-supply configuration used on the ADRV9001 evaluation board (EVB). This supply architecture follows a
conservative approach in the power-supply design. A switch-mode regulator (ADP5056) is used to achieve power efficiency while generating
domains that supply the ADRV9001. Remote sensing configuration is used to take into account the voltage drop in filters and ensure power
domain accuracy at the ADRV9001 input pins.
The ADP5056 contains three switch-mode step-down regulators. Each regulator produces a different power domain that supplies power to the
ADRV9001. They operate as follows:
Channel 1 generates 1.3 V, which supplies voltage for the ADRV9001 1.3 V power domains. Sensing is done after C/FB/C/FB cascaded
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filters and current sensing shunt resistor, ensuring that the 1.3 V analog power domain voltage stays within the user guide specifications.
The ADRV9001 EVB also supports an optional 1.0 V power domain. Generate this domain using an on-board LDO (ADP1762). This LDO
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uses its own remote sensing scheme to ensure that the 1.0 V analog power domain voltage stays within the user guide specifications.
Channel 2 generates 1.0 V, which supplies voltage for the ADRV9001 digital domain. Sensing is done after C/FB/C/FB cascaded filters and
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current sensing shunt resistor to ensure that the 1.0 V digital power domain voltage stays within data sheet specifications.
Channel 3 generates 1.8 V, which supplies voltage for the ADRV9001 digital and analog power domains. The C/FB/C/FB cascaded filters are
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used to isolate the analog power domain from the digital power domain. As more than one power domain is produced from a single source,
remote sensing is done before C/FB/C/FB cascaded filters.
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Figure 269. Power-Supply Connection Diagram
ADRV9001
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