Resistor R16 is the burden resistor that is selected based on the current range and the turns-ratio specification of the CT (not required for shunt). The value of the burden resistor for this design is approximately 6.8 Ω. The anti-aliasing circuitry consisting of R and C follows the burden resistor. The input signal to the converter is a fully differential input with a voltage swing of ±500 mV maximum with gain of the converter set to 1. Similar to the voltage channels, the common-mode voltage is selectable to either analog ground (AGND_AFE) or internal reference.