Preliminary Datasheet SDP3x-Digital Digital Differential Pressure Sensor Smallest size enables portable applications Reflow solderable Pick & Place Excellent repeatability, no drift, no offset Extended feature set smart averaging Calibrated and temperature compensated Product Summary The SDP3x sensor family is Sensirions series of small differential pressure sensors designed for high-volume applications where size is a key requirement. It builds on the next generation CMOSens sensor chip that is at the heart of Sensirions new differential pressure and flow sensing platform. The digital SDP3x sensor features fast measurement speed, excellent accuracy and long-term stability and has no zero-point drift. Furthermore, it is reflow solderable and provides extended functionality, such as smart averaging, multiple temperature 2 compensation modes, configurable I C address and interrupts. Benefits of Sensirions CMOSens Technology High reliability and long-term stability Best signal-to-noise ratio Industry-proven technology with a track record of more than 15 years Designed for mass production High process capability Content 1. Sensor Performance .............................................................. 2 2. Specifications ......................................................................... 3 3. Pin Assignment ...................................................................... 4 4. Measurement Modes ............................................................. 5 5. Digital Interface Description ................................................... 6 6. Package Outline................................................................... 11 7. Soldering .............................................................................. 12 8. Shipping Package ................................................................ 13 9. Ordering Information ............................................................ 13 Revision History ............................................................................ 13 Important Notices ......................................................................... 14 Headquarters and Subsidiaries .................................................... 14 www.sensirion.com Version 0.8 January 2017 1/14 1. Sensor Performance 1 1.1 Differential Pressure Specification Parameter SDP31 SDP32 - 500 to + 500 Pa - 125 to + 125 Pa 2 Measurement range ( 2 inches H O) ( inch H O) 2 2 3,4 Zero point accuracy 0.1 Pa 0.08 Pa 3,4 Span accuracy 3% of reading 3% of reading 4 Zero point repeatability 0.03 Pa 0.025 Pa 4 Span repeatability 0.5% of reading 0.5% of reading Span shift due to < 0.5% of reading per 10C < 0.5% of reading per 10C temperature variation Offset stability < 0.01 Pa/year < 0.01 Pa/year Flow step response time ( ) < 3ms 63 Resolution 16 bit Calibrated for Air, N 2 Media compatibility Air, N O , non-condensing 2, 2 Calibrated temperature -40 C to +85 C range 5 1.2 Temperature Specification Parameter Value Measurement range - 40 C to +85 C Resolution 16 bit 2 C (-10 C to +60 C) Accuracy 3 C (-40 C to +85 C) Repeatability 0.1C 1 Unless otherwise noted, all sensor specifications are valid at 25C with VDD = 3.3 V and absolute pressure = 966 mbar. 2 For other pressure ranges contact Sensirion 3 Includes repeatability 4 Total accuracy/repeatability is a sum of zero-point and span accuracy/repeatability. 5 The measured temperature is the temperature of the bulk silicon in the sensor. This temperature value is not only depending on the gas temperature, but also on the sensors surroundings. Using the signal to measure solely the gas temperature will need special precautions, such as isolating the sensor from external temperate influences. www.sensirion.com Version 0.8 January 2017 2/14