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 - v4.0 SDP1000 / SDP2000 Product Summary The SDP1000 / SDP2000 differential pressure sensors for air cover the following measurement ranges: -5 to 125 Pa (0.5 inch H2O), -20 to 500 Pa (2 inch H2O), and -100 to 3500 Pa (14 inch H2O). Mounted in a rugged, chemically inert PPS housing the SDP1000 / SDP2000 differential pressure sensors feature a unique dynamic range, zero offset and unsurpassed long term stability. This makes it an ideal fit for demanding yet cost sensitive OEM applications in HVAC and medical equipment. The devices are supplied with 5.0 V and provide a 0.25...4.0V output. Although the output of the SDP1000 / SDP2000 differential pressure sensor is analog, the internal linearization and temperature compensation is performed digitally. This results in a superior accuracy, outstanding resolution (up to 0.05 Pa), and lowest temperature dependence. The SDP1000 is available with a linear or square root extracted output characteristics at the same price. Since fully exchangeable just a few external electronic components around the SDP1000 / SDP2000 make a high quality differential sensor transmitter with e.g. an 0...10 V output or other interfaces (see Figure 8). Its leading performance is based on Sensirion's proprietary CMOSens® sensor technology which combines the sensor element with amplification and A/D conversion on one single silicon chip. The differential pressure is measured by a thermal sensor element. In contrast to other thermal differential pressure sensors only a very small amount of air is required (see Figure 6). Thhis leads to a reliable operation even under harsh conditions. In comparison to membrane based sensors the SDP1000 / SDP2000 differential pressure sensors show an extended measurement range, better offset stability and improved reproducibility even at lowest pressure ranges (see Figure 1 and 2). In addition the SDP1000 / SDP2000 is robust against pressure bursts and shows no sensitivity to the mounting orientation. SDP1000 / SDP2000 is fully RoHS compliant. Applications Block Diagram Medical HVAC Automotive Process Automation .!5 d ^ c !5 o CD co 5 -W CMOSens® SENSOR CHIP 5.0 V GND OUT 0.25 V to 4 V CD CD C O O ro 2> o LJ < ~ E e e www.sensirion.com Sensirion - the sensor company

SENSIRION TH6 SENSOR COMPANY Table 2: Additional sensor spcifications. Media Air, N2 - for other gases contact Sensirion AG. Operating Conditions: - Temperature - Humidity -10 °C ... +60 °C / 14°F ... 140 °F non-condensing Ambient storage conditions1 -40 °C ... +80 °C / -40°F ... 176 °F Position sensitivity below resolution Response time 40 ms (for faster response time contact Sensirion) Admissible overpressure (short term) 1 bar (14.5 PSI) Burst Pressure Capability 2 bar (29 PSI) Weight 14 g Protection Class IP 20 Wetted materials Glass (silicon nitride, silicon oxide), Silicon, PPS (Polyphenylene...

2 Electrical Specifications 2.1 Power Supply The SDP1000 / SDP2000 differential pressure sensors require a stable voltage supply of 5 V. Influence of the supply voltage variation on the offset and the sensitivity are given in Table 5. 2.2 Voltage Output The SDP1000 / SDP2000 features a voltage output from 0.25 V to 4.0 V (Figure 2, 3). An output voltage below 0.25 V indicates a negative differential pressure. This range is not calibrated however. Exempt from this statement is the SDP1000-L025, which features a fully bidirectional calibration with 0.2 to 4.0 V output. The resistive load at the...

SENSIRION TH6 SENSOR COMPANY Table 4: SDP1000 / SDP2000 electrical characteristics. Parameter Conditions Min. Typ. Max. Units Power Supply Voltage Vdd 4.75 5.0 5.25 VDC Operating Current 5 V, no load, zero flow 4.3 5.2 mA Output capacitive load Cload 20 200 pF Recommended load Rload 20 100 oo kQ Table 5: Typical power supply dependence of the offset and the sensitivity. Parameter Device 4.75 V 5.0 V 5.25 V Units Offset SDP1000-L05 - 0.4 + 0.4 Pa SDP1000-L - 1.6 + 1.6 SDP2000-L - 10.3 + 10.3 Sensitivity SDP1000-L05 28 30 32 mV/Pa SDP1000-L 7.1 7.5 7.9 SDP2000-L 1.01 1.07 1.13 www.sensirion.com...

SENSIRION TH6 SENSOR COMPANY 3 Physical Dimensions and Mounting Information 3.1 Housing The SDP1000 / SDP2000 differential pressure sensor is mounted in chemically inert PPS housing. The rugged package has been designed to withstand continuous overpressures of at least 1 bar (14.5 PSI). Burst pressure is > 2 bar (29 PSI) The physical dimensions and mounting information is given in Figure 4 and 5. 5.2 (0.205) A 16.0 (0.630] 30.5 (1.200) 2.54 (0.100) 1.8 Pin# 1 2 3 (0.071) | un n 'RFH 22.1 (0.870) L 1 fi □ 13.1 (0.516) q 18.3 (0.720) Dim. A [mm] [inch] [mil] 118 3.00 0.118 B 3.30 0 .130 130 C 1.20...

SENSIRION TH6 SENSOR COMPANY 3.3 Connecting Hose Sensirion recommends a hose with an inner diameter of 1/8 to 3/20 inch (3.18 to 3.8mm). Due to the dynamic measurement principle, a small air flow is required (Figure 6) which leads to a dependence on the length of the hose (Figure 7). Tubes up to 1 m show less than 1 % error of the measured value (Figure 7). E _o 0> 120 -t 100 -80 -60 -40 - 20 0 Length of the Connecting hose Deviation of Measured Value 0.5 m (20 inch) - 0.4 % 1.0 m (40 inch) - 0.8 % 2.0 m (80 inch) - 1.6 % 4.0 m (160 inch) - 3.2 % 0 20406080100 differential pressure [% full scale]...

5 Ordering Information When ordering SDP1000 / SDP2000 differential pressure sensors please refer to the following part names and article numbers. For the latest product information and local distributor check out Sensirion's website on http://www.sensirion.com Table 6: Overview ordering information Part Name Output Range (Full Scale) Article Number SDP1000-L025 Voltage 0.2 - 4.0 V, linear ± 62 Pa ± 62 mbar ±0.25 "H20 ± 0.009 PSI 1-100313-02 SDP1000-L05 Voltage 0.25 - 4.0 V, linear 125 Pa 1.25 mbar 0.5 "H20 0.018 PSI 1-100235-02 SDP1000-L Voltage 0.25 - 4.0 V, linear 500 Pa 5 mbar 2 "H20 0.07...