Summary of INFINEON TECHNOLOGIES XENSIV™ PAS CO2 SENSOR
Increasingly efficient building insulation can reduce energy use but may worsen indoor air quality; moderate CO2 levels (around 1000 ppm) impair concentration and cause drowsiness. There is growing demand for smart CO2 sensors that detect rising CO2 and alert users or trigger ventilation. The described Infineon XENSIV PAS CO2 sensor measures 0–10000 ppm with ±(30 ppm + 3%) accuracy (400–5000 ppm), supports I2C, UART, and PWM, consumes ~30 mW at one measurement per minute, and comes in a compact SMD package with self-calibration and configurable sampling and baseline options.
Parts used in theInfineon XENSIV PAS CO2 Sensor Project:
- Infineon XENSIV PAS CO2 sensor (SMD package, 14 x 13.8 x 7.5 mm)
- I2C interface for communication
- UART interface for communication
- PWM output option (PWMA)
- Power supply capable of ~30 mW consumption
- Tape and reel packaging for SMD mounting
- Onboard advanced compensation and self-calibration firmware
Increasingly efficient building insulation can help to mitigate the effects of climate change, but heavily insulated buildings are not always good for human health. Poor ventilation can result in lower oxygen levels and a build-up of carbon dioxide (CO2). Even moderate levels of CO2 can have a negative impact on health and productivity. Already at 1000 ppm, people begin to experience drowsiness and have difficulty concentrating. Consequently, there is a growing demand for smart indoor air quality sensors that can “smell” rising levels of CO2 and either alert the user or trigger a system response.
Key Features
- Operating range: 0 ppm to 10000 ppm
- Accuracy: ± (30 ppm +3%) of reading between 400 ppm and 5000 ppm
- Interface: I2C, UART, and PWM
- Average power consumption: 30 mW typically at 1 measurement/minute
Additional Features
- Exceptionally small form factor (14 x 13.8 x 7.5 mm)
- Accurate and robust performance at ppm level (±30 ppm ±3% of reading)
- SMD package delivered in tape and reel
- Advanced compensation and self-calibration algorithms
- Various configuration options (e.g. sampling rate, baseline calibration) and interfaces (UART, I2C, PWM)
Read more: INFINEON TECHNOLOGIES XENSIV™ PAS CO2 SENSOR
- What is the operating CO2 range of the sensor?
The operating range is 0 ppm to 10000 ppm. - How accurate is the sensor?
The accuracy is ±(30 ppm + 3%) of reading between 400 ppm and 5000 ppm. - Which communication interfaces does the sensor support?
It supports I2C, UART, and PWM interfaces. - What is the typical power consumption?
Average power consumption is about 30 mW at one measurement per minute. - What is the physical size of the sensor package?
The SMD package measures 14 x 13.8 x 7.5 mm. - Does the sensor include self-calibration?
Yes, it includes advanced compensation and self-calibration algorithms. - Can sampling rate and baseline calibration be configured?
Yes, various configuration options such as sampling rate and baseline calibration are available. - Is the sensor suitable for detecting levels that affect human concentration?
Yes, it measures CO2 levels including around 1000 ppm, which the article notes can cause drowsiness and difficulty concentrating.
