Datasheet SDP1000 Low Range Differential Pressure Sensor for Air and Non-Aggressive Gases For HVAC and medical OEM applications Unsurpassed performance thanks to CMOSens technology Offset and hysteresis free Excellent accuracy and reproducibility even below 10 Pa Fully calibrated and temperature compensated Linear or square root extracted output characteristics available Not sensitive to the mounting orientation Direct PCB mounting with simple snap-on system Datasheet v5.1 SDP1000 Product Summary The SDP1000 differential pressure sensors for air cover differential sensor transmitter with e.g. an 0...10 V output the following measurement ranges: 5 to 125 Pa (0.5 or other interfaces. inch H O), and -20 to 500 Pa (2 inch H O). Its leading performance is based on Sensirions 2 2 Mounted in a rugged, chemically inert PPS housing the proprietary CMOSens sensor technology which SDP1000 differential pressure sensors feature a unique combines the sensor element with amplification and A/D dynamic range, zero offset and unsurpassed long term conversion on one single silicon chip. The differential stability. This makes it an ideal fit for demanding yet cost pressure is measured by a thermal sensor element. In sensitive OEM applications in HVAC and medical contrast to other thermal differential pressure sensors equipment. only a very small amount of air is required. This leads to The devices are supplied with 5.0 V and provide a a reliable operation even under harsh conditions. In 0.254.0 V output. Although the output of the SDP1000 comparison to membrane based sensors the SDP1000 differential pressure sensor is analog, the internal differential pressure sensors show an extended linearization and temperature compensation is measurement range, better offset stability and improved performed digitally. This results in a superior accuracy, reproducibility even at lowest pressure ranges. In outstanding resolution, and lowest temperature addition, the SDP1000 is robust against pressure bursts dependence. and shows no sensitivity to the mounting orientation. Since fully exchangeable just a few external electronic components around the SDP1000 make a high quality Applications Block Diagram - Medical V DD - HVAC CMOSens 5.0 V SENSOR CHIP - Automotive GND - Process Automation OUT 0.25 V to 4 V www.sensirion.com Version 5.1 April 2017 1/8 Differential pressure Sensor A/D converter DIGITAL Linearization and Temperature compensation D/A Memory converterDatasheet SDP1000 Series 1 Specifications Table 1: Sensor specifications (at 23C and p = 966mbar, VDD = 5.0 V unless otherwise noted). absolute SDP1000-L025 SDP1000-L05 SDP1000-L Unit Parameter Min Typ Max Min Typ Max Min Typ Max -62 62 -5 125 - 20 500 Pa Measurement range -0.25 0.25 -0.02 0.5 -0.08 2 Inch water Power supply 4.75 5.00 5.25 4.75 5.00 5.25 4.75 5.00 5.25 V (see Tab 4) Full scale output Typ. 4.00V at +62Pa 4.00 4.00 V (100 k load) Typ. 0.20V at 62Pa Zero Pressure Output 2.10 0.250 0.250 V (1)(2) 0.5 0.6 0.2 0.3 0.1 0.2 % FS Accuracy (also see Figure 1) (1) 1.5 2 1.5 2 1 1.5 % m.v. (1) Repeatability 0.3 0.5 0.3 0.5 0.3 0.5 % m.v. Offset stability 0 0.1 0 0.1 0 0.1 Pa / year Additional error (2) 0.003 0.006 0.003 0.006 0 0 % FS/C over temperature 0.03 0.05 0.03 0.05 0.03 0.05 % m.v./C (T 23C) (1) Resolution < 30% FS 0.05 0.1 0.2 Pa (1) Resolution 30..70% FS 0.05 0.1 0.2 0.05 0.1 0.2 0.2 0.5 1.5 Pa (1) Resolution > 70% FS 1.5 2.2 3 Pa (1) FS = full scale or span, m.v. = measured value, i.e. reading, whichever value is bigger (2) FS = full scale or span, i.e. for the SDP1000-L it is 500 Pa (2 H2O), for the SDP1000-L025 it is 62 Pa (0.25 H2O) 7 10 9 (1) SDP1000-L (1) SDP1000 around 23C 6 (2,3) Membrane based sensors (2) SDP1000 between 050C 8 (3) Typical membrane based 5 7 2 sensor with 1.5% FS error 6 between 1040C 4 5 3 3 4 3 (3) 2 2 (2) 1 1 (1) 0 1 0 0 10 20 30 40 50 60 70 80 90 100 0 1 2 3 4 repeatability Pa differential pressure % full scale Figure 1: Accuracy (includes errors caused by offset, linearity, Figure 2: Max. repeatability and offset drift/year of hysteresis and repeatability) of the SDP1000-L (1), (2) the SDP1000-L (1) compared with two compared with typical membrane sensors (3). typical membrane based sensors (2,3). www.sensirion.com Version 5.1 April 2017 2/8 error % of measured value offset drift/year Pa