Product Brief PAS210 XENSIV environmental sensor (Infineon)

Product brief XENSIV™ environmental sensor CO2 PAS sensor based on the photoacoustic principle The XENSIV™ CO2 PAS sensor is a real carbon dioxide (CO2) sensor in an unprecedented small Key features form factor. Designed on the basis of a unique photoacoustic spectroscopy (PAS) concept, the sensor saves more than 75 percent space compared to existing commercial real CO › 2 Unprecedented small form factor in sensors. Its direct ppm readings, SMD capability and simple design allow for a quicker and an SMD module easier integration into customers’ systems in low and high-volume applications alike. ›ppm reading of the CO2 level ›Operating range The photoacoustic principle can be traced back to over 100 years ago and was first – CO2: 0 ppm to 10,000 ppm discovered by Alexander Graham Bell in 1880. The photoacoustic effect involves the – Temperature: 0 °C to 50 °C formation of sound waves (pressure changes) following light absorption in a material ›Supply voltage sample. The sound signal is quantified by detectors, such as microphones. In order to – VDDIO = 3.3 V obtain this effect, the light intensity must vary. A PAS gas sensor is based on the principle – VDD12 V = 12 V that gases absorb light in a specific wavelength of the infrared spectrum. CO › 2 molecules, Interface: UART, I2C, PWM for example, have strong absorption in the λ = 4.2 µm wavelength. The CO2 PAS sensor module integrates on the same PCB, the photoacoustic (PAS) Benefits -P transducer, a microcontroller for signal processing, algorithms and a MOSFET. As depicted in the block diagram, the PAS transducer includes: i) a proprietary infrared emitter with ›Saves space in customers’ end blackbody radiation which is periodically chopped by the MOSFET, ii) a narrow-band products V1-7600-EU-EC optical filter passing the CO › 2 specific wavelength λ = 4.2 µm, significantly improving Accurate and robust performance the sensor selectivity compared to other gases, including humidity, iii) and Infineon’s ›Easy-to-integrate SMD module high-SNR (Signal-to-Noise Ratio) MEMS microphone XENSIV™ IM69D130, detecting the ›On-board processing with the inte- pressure changes generated by the CO2 molecules. All the components are developed grated microcontroller and designed in-house in accordance with Infineon’s high-quality guidelines. The sensor ›Manufacturing scalability der number: B132-I0858- therefore benefits from Infineon’s illustrious record of accomplishments in MEMS design Or and acoustic capabilities, leading to the best-in-class price/performance CO2 sensor. / 2019 Applications e: 06 The CO2 PAS sensor is ideal for smart-home and building automation as well as various Dat indoor air quality IoT devices such as air purifiers, thermostats, weather stations and ›Ventilation control/building auto- ved. personal assistants. The sensor enables end users to track, understand and improve the mation eser air quality surrounding them in a timely and highly energy-efficient manner. ›Smart appliances such as air purifi- = 4.2 µm ers, air conditioners ›Consumer devices for air quality G. All Rights R monitoring, such as thermostats, weather stations and personal echnologies A assistants ›Smart indoor lighting Infrared Optical Absorption chamber Microphone ›In-cabin air quality monitoring light source filter with diffusion port with output © 2019 Infineon T www.infineon.com