SNAS678B May 2018 – May 2019 HDC2080
When a circuit board layout is created from the schematic shown in Figure 16, a small circuit board is possible. The accuracy of a RH and temperature measurement depends on the sensor accuracy and the setup of the sensing system. The HDC2080 samples relative humidity and temperature in its immediate environment, it is therefore important that the local conditions at the sensor match the monitored environment. Use one or more openings in the physical cover of the thermostat to obtain a good airflow even in static conditions. Refer to the layout (Figure 18) for a PCB layout which minimizes the thermal mass of the PCB in the region of the HDC2080, which can improve measurement response time and accuracy.