SDP1000 / SDP2000 Low Range Differential Pressure Sensor for Air and Non-Aggressive Gases For cost sensitive 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 actual size Data Sheet v5 SDP1000 / SDP2000 Product Summary The SDP1000 / SDP2000 differential pressure sensors around the SDP1000 / SDP2000 make a high quality for air cover the following measurement ranges: 5 to differential sensor transmitter with e.g. an 0...10 V output 125 Pa (0.5 inch H O), -20 to 500 Pa (2 inch H O), and - or other interfaces (see Figure 8). 2 2 100 to 3500 Pa (14 inch H O). Its leading performance is based on Sensirions 2 Mounted in a rugged, chemically inert PPS housing the proprietary CMOSens sensor technology which SDP1000 / SDP2000 differential pressure sensors combines the sensor element with amplification and A/D feature a unique dynamic range, zero offset and conversion on one single silicon chip. The differential unsurpassed long term stability. This makes it an ideal fit pressure is measured by a thermal sensor element. In for demanding yet cost sensitive OEM applications in contrast to other thermal differential pressure sensors HVAC and medical equipment. only a very small amount of air is required (see The devices are supplied with 5.0 V and provide a Figure 6). This leads to a reliable operation even under 0.254.0 V output. Although the output of the harsh conditions. In comparison to membrane based SDP1000 / SDP2000 differential pressure sensor is sensors the SDP1000 / SDP2000 differential pressure analog, the internal linearization and temperature sensors show an extended measurement range, better compensation is performed digitally. This results in a offset stability and improved reproducibility even at superior accuracy, outstanding resolution (up to 0.05 lowest pressure ranges (see Figure 1 and 2). In addition Pa), and lowest temperature dependence. The SDP1000 the SDP1000 / SDP2000 is robust against pressure is available with a linear or square root extracted output bursts and shows no sensitivity to the mounting characteristics at the same price. Since fully orientation. exchangeable just a few external electronic components SDP1000 / SDP2000 is fully RoHS compliant. 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 Sensirion - the sensor company Differential pressure Sensor A/D converter DIGITAL Linearization and Temperature compensation D/A Memory converter 1 Specifications Table 1: Sensor specifications (at 23C and p = 966 mbar, VDD = 5.0 V unless otherwise noted). absolute SDP1000-L025 SDP1000-L05 SDP1000-L SDP1000-R SDP2000-L Unit Parameter Min Typ Max Min Typ Max Min Typ Max Min Typ Max Min Typ Max -62 62 -5 125 - 20 500 - 20 500 -100 3500 Pa Measurement range -0.25 0.25 -0.02 0.5 -0.08 2 -0.08 2 -0.4 14 Inch water Power supply 4.75 5.00 5.25 4.75 5.00 5.25 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 4.00 4.00 V (100 k load) Typ. 0.20V at 62Pa Zero Pressure Output 2.10 0.250 0.250 0.250 0.250 V (1)(2) 0.5 0.6 0.2 0.3 0.1 0.2 0.2 0.3 0.1 0.2 % FS Accuracy (also see Figure 1) (1) 1.5 2 1.5 2 1 1.5 1 1.5 1 1.5 % m.v. (1) Repeatability 0.3 0.5 0.3 0.5 0.3 0.5 0.3 0.5 0.3 0.5 % m.v. Offset stability 0 0 0 0 0 Pa / year 0.1 0.1 0.1 0.3 0.3 (2) Additional error 0.003 0.006 0.003 0.006 0 0 0 0 0 0 % FS/C over temperature 0.03 0.05 0.03 0.05 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 0.05 0.1 0.2 0.2 0.5 1 Pa (1) Resolution 30..70% FS 0.05 0.1 0.2 0.05 0.1 0.2 0.2 0.5 1.5 0.2 0.5 1.5 1 2.5 8 Pa (1) Resolution > 70% FS 1.5 2.2 3 1.5 2.2 3 8 11 14 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 it is 500 Pa (2 H2O), for the SDP1000-L025 it is 62 Pa (0.25 H2O), (3) See 2.2 Voltage Output formula for conversion 7 10 9 (1) SDP1000-L (1) SDP1000 / SDP2000 around 6 (2,3) Membrane based sensors 23C 8 (2) SDP1000 / SDP2000 between 5 7 2 050C 6 (3) Typical membrane based 4 5 sensor with 1.5% FS error between 1040C 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 v5 February 2013 2/10 error % of measured value offset drift/year Pa