Application Note CCS801 Design guidelines
This application note describes the design guidelines in terms of electronic design, mechanical and thermal considerations for CCS801.
CCS801 is an ultra-low power MOX gas sensor which willdetect a wide range of Volatile Organic Compounds (VOCs) such as Ethanol and can be used for applications which support indoor air quality monitoring. CCS801 with software algorithms can be used as an equivalent carbon dioxide (eCO₂) sensor to represent eCO₂ levels in real world environments, where the main source of VOCs is from humans.
For CCS801 a supply voltage (V-H) is provided to the integrated micro-heater and the gas concentration can be correlated to the change in resistance of the MOX sensing layer (R-S).
V-H can be set using a low-dropout (LDO) regulator or operated in constant or pulsed PWM mode to reduce power consumption. The sensor resistance (R-S) is typically determined using a series load resistor (R-L), a reference voltage (V-REF), and by reading an output voltage (V-OUT) with an Analogue-to-Digital Converter (ADC). The reference voltage (V-REF) must only be enabled during the sensor reading.
Therefore external control of CCS801 is required for the appropriate heater settings, perform sensor measurements and run software / algorithm to output a result.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2017-Sep-29 |
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v2-00 |
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835 KB |
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