CCS801B-COPD500 ScioSense

CCS801 Ultra-Low Power Analog VOC Sensor for Indoor Air Quality Monitoring ams micro-hotplate technology provides a unique silicon General Description platform for the CCS80x range of Metal Oxide (MOX) gas sensors. These devices enable sensor miniaturization, have ultra-low power consumption and provide fast response times due to the ability to heat the micro-hotplate very quickly.The micro-hotplates are fabricated using a robust silicon dioxide membrane and include an embedded tungsten heating element to heat the MOX based sensing material. The MOX sensing material can be heated up to 500C to allow the electrical resistance of the MOX sensor to be monitored to detect the target gas. By exploiting the fast heater cycling times, temperature modulation techniques can be used to reduce the device power consumption and implement advanced gas sensing methods. Software libraries containing proprietary algorithms and example Android applications are available for indoor air quality monitoring. Product Overview CCS801 is an ultra-low power analog sensor for monitoring indoor air quality including Carbon Monoxide (CO) and a wide range of Volatile Organic Compounds (VOCs) such as Ethanol. CCS801 can be used as an equivalent carbon dioxide (eCO ) 2 sensor to represent eCO levels in real world environments, 2 where the main source of VOCs is from humans. For CCS801 a supply voltage (V ) is provided to the integrated H micro-heater and the gas concentration can be correlated to the change in resistance of the MOX sensing layer (Rs). V can be operated in constant or pulsed mode to reduce power H consumption. The sensor resistance (R ) is typically determined S using a series load resistor (R ), a reference voltage (V ), and L REF by reading an output voltage (V ) with an OUT Analogue-to-Digital Converter (ADC). The reference voltage (V ) must only be enabled during the sensor reading. REF CCS801 is supported in a compact 2mm x 3mm x 1mm DFN (Dual Flat No lead) package as standard. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet Page 1 v1-04 2018-Apr-23 Document FeedbackCC S8 01 Gene ral Des c rip t ion Key Benefits & Features The benefits and features of CCS801, Ultra-Low Power Analog VOC Sensor for Indoor Air Quality Monitoring are listed below: Figure 1: Added Value of Using CCS801 Sensor Benefits Features Extend battery life for portable applications Optimized low-power modes Sensitive to target gases Reduced cross sensitivity Fast heating time <15ms Quick response to target gases Suitable for small form factor designs Compact 2mm x 3mm x 1mm DFN package Applications CCS801 can be used to detect VOCs for indoor air quality monitoring. Application Diagram The recommended configuration of this device is shown below: Figure 2: Recommended Sensor Configuration V REF R = 200K L V OUT Gas 1 3 R S GND R H 2 4 V = 1.4 - 1.6V H GND Page 2 ams Datasheet Document Feedback v1-04 2018-Apr-23