ePY12XX1 (SMD) (Rev. 3.0) PRELIMINARY TM 2 ezPyro I C Pyroelectric Infrared Sensor for Gas Sensing (SMD) Introduction The ezPyro range of thin film digital pyroelectric IR sensors for gas detection and concentration measurement combines high quality sensors with a high level of configurable electronic integration in a small SMD package. High sensitivity combined with fast response times ensure rapid and accurate detection of target gases. These sensors integrate a digital, current mode read-out that enables lower IR-emitter duty cycles, thereby saving significantly on system level power consumption, while maintaining high SNR. Programmable gain and filtering offer maximum flexibility in system design. Industry 2 standard I C communication enables plug-and-play connectivity to microcontrollers and allows easy tuning and calibration. ezPyro sensors are very stable over time ensuring a long and maintenance-free operational lifespan. Various optical filter options are available. These sensors can also be daisy-chained to allow synchronized sampling across devices. Sensor Characteristics Electrical Characteristics Filter aperture d = 1.65 mm Supply voltage 1.75 to 3.6 V 2 Element size 0.64 x 0.64 mm Supply current (typ.) 1 to 23 A 2 SMD Package 5.65 x 3.7 x 1.55 mm Digital I/O I C (FM+ compatible) 1 8 D* (typ.) 2.5 x 10 cmHz/ W ADC 15bit ADC 1ksp 1 -10 NEP (typ.) 2.7 x 10 W/Hz Operating Temperature -40 to +85 C Time Constant ~ 10ms (10-20 Hz peak) Storage Temperature -40 to +110 C Field of View ~90 Sensor read-out Current mode Gain / digital filtering / sampling rate / power Configurable modes 1) Measured without filter 500K, 10 Hz, room temperature Order Information Part Number Filter m Filter BW m Gas Ordering Code Description ePY12211 3.91 90 Reference ePYxxxxx-R7 800 pcs on 7 tape and reel ePY12221 3.30 160 CH4 ePYxxxxx-R13 4000 pcs on 13 tape and reel ePY12231 4.26 180 CO2 ePYxxxxx bulk ePY12241 4.64 180 CO ePYxxxxx-B1 Sensor on a breakout PCB ePY12261 5.30 180 NO For more information contact: sales pyreos.com Please note: the information contained in this document is subject to change without further notification. Pyreos reserves the right to alter the performance and any resulting specification. Pyreos may choose not to supply any engineering sample devices as a commercial product. No responsibility is accepted for any consequential loss incurred. Pyreos Ltd, SMC, Alexander Crum Brown Road, Edinburgh EH9 3FF, UK. Tel: +441316507009, www.pyreos.com 1 ePY12XX1 (SMD) (Rev. 3.0) PRELIMINARY Package Information Signal Filtering & Power Modes Fixed Analog Fixed Digital Max ADC Power Mode (base Digital Low Pass Filter High Pass Filter Analog (Hz) Low Pass Low Pass Sampling Rate sample rate) (Hz) Filter (Hz) Filter (Hz) (sps) Normal Power Mode Off 1 2 4 8 600 250 180 90 45 22.5 1000 Low Power Mode Off 0.17 0.33 0.66 1.3 100 42 30 15 7.5 3.75 166 Typical Current Consumption Mode Description (1.8 V, room temperature) Normal Power Mode Normal power consumption, 1 kHz max. sample rate 22 A Power consumption 3.5 A Low Power Mode Low power consumption, 166 Hz max. sample rate 2 Normal Operation Mode Sensor signal readout over I C 22 A Operational 21 A (Normal), 3.5 A (Low) Sleep Mode Hardware interrupt on infrared trigger state Power Down Mode Sensor is disabled 1.1 A Circuit Diagrams Single Device Block Diagram Three Devices with Synchronised Sampling Please note: the information contained in this document is subject to change without further notification. Pyreos reserves the right to alter the performance and any resulting specification. Pyreos may choose not to supply any engineering sample devices as a commercial product. No responsibility is accepted for any consequential loss incurred. Pyreos Ltd, SMC, Alexander Crum Brown Road, Edinburgh EH9 3FF, UK. Tel: +441316507009, www.pyreos.com 2