SNAS678B May 2018 – May 2019 HDC2080
The HDC2080 operates only as a slave device on the I2C bus interface. It is not allowed to have multiple devices on the same I2C bus with the same address. Connection to the bus is made through the open-drain I/O lines, SDA, and SCL. The SDA and SCL pins feature integrated spike-suppression filters and Schmitt triggers to minimize the effects of input spikes and bus noise. After power-up, the sensor needs at most 3 ms, to be ready to start RH and temperature measurement. After power-up the sensor is in sleep mode until a communication or measurement is performed. All data bytes are transmitted MSB first.