Arduino Shield SGPC3_SHTC1 Sensirion

Datasheet SGPC3 Indoor Air Quality Sensor for TVOC Measurements Ultra-low power gas sensor for indoor air quality applications Outstanding long-term stability Ultra-low power consumption: 0.065 mA at 1.8V 2 I C interface with TVOC output signal 3 Very small 6-pin DFN package: 2.45 x 2.45 x 0.9 mm Tape and reel packaged, reflow solderable Product Summary 3 The very small 2.45 x 2.45 x 0.9 mm DFN package The SGPC3 is a digital ultra-low power gas sensor designed for mobile and battery-driven indoor air and its ultra-low power consumption make the quality applications. Sensirions CMOSens SGPC3 perfectly suited for mobile and wearable technology offers a complete sensor system on a applications. Sensirions state-of-the-art production 2 process guarantees high reproducibility and reliability. single chip featuring a digital I C interface, a temperature-controlled micro-hotplate and a Tape and reel packaging, together with suitability for preprocessed indoor air quality signal. The sensing standard SMD assembly processes make the SGPC3 element features an unmatched robustness against predestined for high-volume applications. contamination by siloxanes present in real-world applications enabling a unique long-term stability and low drift. Block Diagram Figure 1 Functional block diagram of the SGPC3. www.sensirion.com Version 1.0 May 2020 D1 1/19 1 Sensor Performance 1.1 Gas Sensing Performance Parameter Signal Values Comments Measurement Ethanol signal 0 ppm to 1000 ppm 1 range The specifications below are defined for this measurement Specified 2 Ethanol signal 0.3 ppm to 30 ppm range. The specified measurement range covers the gas range concentrations expected in indoor air quality applications. Accuracy is defined as c - c set c set with c the measured concentration and c the set concentration set point. The concentration c is determined by see Figure 2 Relative s - s Ethanol signal ref out 3 accuracy typ.: 15% of meas. value c = c exp ( ) ref 512 with sout: Ethanol signal output at concentration c s : Ethanol signal output at concentration ref cref = 0.18 ppm see Figure 3 Change of accuracy over time: Siloxane accelerated 4 Long-term drift Ethanol signal 5 lifetime test typ.: 1.3% of meas. value Resolution of Ethanol signal output in relative change of the Resolution Ethanol signal 0.2 % of meas. value measured concentration The on-chip baseline algorithm has been optimized for Low power mode: 2s Sampling time Ethanol signal these sampling rates. The sensor shows best performance Ultralow power mode: 30s when used with this sampling rate. Table 1 Gas sensing performance. Specifications are at 25C, 50% RH and typical VDD. All parameters are determined for the low-power operation mode with one measurement every 2s. The sensors have been operated for at least 24h before the first characterization. 1 Exposure to ethanol and H2 concentrations up to 1000 ppm have been tested. For applications requiring the measurement of higher gas concentrations please contact Sensirion. 2 ppm: parts per million. 1 ppm = 1000 ppb (parts per billion) 3 90% of the sensors will be within the typical accuracy tolerance, >99% are within the maximum tolerance. 4 The long-term drift is stated as change of accuracy per year of operation. 5 Test conditions: operation in 250 ppm Decamethylcyclopentasiloxane (D5) for 200h simulating 10 years of operation in an indoor environment. www.sensirion.com Version 1.0 May 2020 D1 2/19