CCS811
CCS811 is a low-power digital gas sensor solution, which integrates a gas sensor solution for detecting low levels of VOCs typically found indoors, with a microcontroller unit (MCU) and an Analog-to-Digital converter to monitor the local environment and provide an indication of the indoor air quality via an equivalent CO2 or TVOC output over a standard I2C digital interface.
CCS811 functions include; a metal oxide (MOX) gas sensor, a microcontroller, a Analog-to-Digital converter (ADC) and a I2C digital interface, all inside a compact 2.7 x 4.0 mm, 0.6mm LGA package suitable for low cost PCB technology. This unique technology signicantly reduces power consumption through very fast cycle and measurement times. The CCS811 supports multiple measurement modes which have been optimised for low-power consuming <1.2mW on average during active sensor measurement per minute and <6uW in idle mode. The CCS811 supports an integrated MCU that manages the sensor drive modes, ADC measurements and processes raw sensor data during gas detection using intelligent detection algorithms to represent equivalent CO2 (eCO2) level or TVOC measurement in real world environments, where the main cause of VOCs is from humans. This on-boarding processing reduces the overall system power consumption and processing required on the host system. The CCS811 supports a standard I2C digital interface compatible with application processors, and provides a highly integrated solution. Compared to using separate gas sensor and microcontroller chips, which typically require two or more additional components, the CCS811 can save on the device’s bill of materials (BOM) and up to 60 percent on the board footprint.
Target application for CCS811 is Indoor air quality monitoring in Smarthome and other accessory devices.