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(R) 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 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(R) 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). This 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 www.sensirion.com D/A converter DIGITAL Linearization and Temperature compensation A/D converter CMOSens(R) SENSOR CHIP Differential pressure Sensor - Medical - HVAC - Automotive - Process Automation Memory 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...4.0 V 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 VDD 5.0 V GND OUT 0.25 V to 4 V Sensirion - the sensor company 1 Specifications Table 1: Sensor specifications (at 23C and pabsolute = 966 mbar, VDD = 5.0 V unless otherwise noted). Parameter SDP1000-L025 SDP1000-L05 Min Max Min 62 -5 Typ -62 Measurement range Power supply -0.25 4.75 (see Tab 4) Typ Max Min 125 5.25 4.75 5.00 Typ SDP1000-R Max Min - 20 500 0.5 -0.08 5.25 4.75 0.25 -0.02 5.00 SDP1000-L 5.00 Typ SDP2000-L Max Min - 20 500 -100 3500 Pa 2 -0.08 2 -0.4 14 Inch water 5.25 4.75 5.25 4.75 5.25 V 5.00 Typ Unit Max 5.00 Typ. 4.00V at +62Pa Typ. 0.20V at -62Pa 4.00 4.00 4.00 4.00 V Zero Pressure Output 2.10 0.250 0.250 0.250 0.250 V Accuracy 0.5 0.6 0.2 0.3 0.1 0.2 0.2 0.3 0.1 0.2 % FS (1)(2) (also see Figure 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. (1) Offset stability 0 0.1 0 0.1 0 0.1 0 0.3 0 0.3 Pa / year 0.003 0.006 0.003 0.006 0 0 0 0 0 0 % FS/C (2) 0.03 0.03 0.03 0.05 0.03 0.05 0.03 0.05 0.1 0.2 0.05 0.1 0.2 0.2 0.5 1 Pa 0.2 0.5 1.5 0.2 0.5 1.5 1 2.5 8 Pa 1.5 2.2 3 1.5 2.2 3 8 11 14 Pa Full scale output (100 k load) Additional error over temperature (T 23C) Resolution < 30% 0.05 0.05 FS(1) Resolution 30..70% FS(1) 0.05 0.1 0.2 0.05 0.1 0.2 Resolution > 70% FS(1) 0.05 % m.v./C (1) FS = full scale or span, m.v. = measured value, i.e. reading, whichever value is bigger 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 (2) 7 9 (1) 8 7 (2) 6 (3) 5 4 SDP1000 / SDP2000 around 23C SDP1000 / SDP2000 between 0...50C Typical membrane based sensor with 1.5% FS error between 10...40C 3 (3) 2 (1) SDP1000-L (2,3) Membrane based sensors 6 offset drift/year [Pa] error [ % of measured value] 10 5 2 4 3 3 2 (2) 1 (1) 1 0 0 10 20 30 40 50 60 70 80 90 0 1 2 3 4 repeatability [Pa] differential pressure [% full scale] Figure 1: Accuracy (includes errors caused by offset, linearity, hysteresis and repeatability) of the SDP1000 -L (1), (2) compared with typical membrane sensors (3). www.sensirion.com 1 0 100 Figure 2: Max. repeatability and offset drift/year of the SDP1000-L (1) compared with two typical membrane based sensors (2,3). v5 February 2013 2/10 Table 2: Additional sensor specifications. (1) Media Air, N2 - for other gases contact Sensirion AG. Operating Conditions: - Temperature - Humidity -10 C ... +60 C / 14F ... 140 F non-condensing Ambient storage conditions1 -40 C ... +80 C / -40F ... 176 F Orientation 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 Sulfide), PEEK (Polyetheretherketone), FR4, Silicone as static sealing, Epoxy, Gold Gas flow through sensor see Figure 6. Lead free The SDP1000 family is fully RoHS compliant For maximum 2 weeks 1.1 Temperature Compensation The SDP1000 / SDP2000 differential pressure sensors feature a sophisticated built-in temperature compensation circuit. The temperature is measured on the CMOSens chip by means of a PTAT bandgap reference temperature sensor. Its data is fed into a compensation circuit which is also integrated on the CMOSens(R) sensor chip. No external temperature compensation is therefore required. 1.2 Altitude Correction The SDP1000 / SDP2000 differential pressure sensors achieve their unsurpassed performance by using a dynamic measurement principle, i.e. an applied differential pressure forces a small air flow through the sensor. This results in a dependence of the indicated differential pressure on the ambient air density. While the temperature effect is compensated (see Paragraph 1.1) the altitude above sea level has an influence on the SDP1000 / SDP2000 output. If desired, this effect can be compensated by a correction factor according to the following equation: Table 3: Altitude correction factors. Altitude [meter] Ambient Pressure (Pamb) [mbar] 0 250 425 500 750 1500 2250 3000 1013 984 966 958 925 842 766 697 Correction Factor Pcal / Pamb 0.95 0.98 1.00 1.01 1.04 1.15 1.26 1.38 Example: The SDP1000 is used at 750 m above sea level. The output of the SDP1000 shows 0.5 V, which corresponds to Dpsensor = 33.3 Pa. Taking into account the correction factor Pcal / Pamb = 1.04 the effective differential pressure Dpeff is 33.3 Pa * 1.04 = 34.6 Pa. Note: Dpeff = Dpsensor * Pcal / Pamb where Dpeff is the effective differential pressure, Dpsensor the differential pressure indicated by the SDP1000 / SDP2000, Pcal the absolute pressure during calibration (966 mbar) and Pamb the actual ambient absolute pressure. www.sensirion.com This leads to the following correction factors: In many HVAC applications such as filter monitoring, fan/ventilator control or air flow measurement the described effect is actually welcome since at the end the mass flow and not volume flow is the effective value to control. v5 February 2013 3/10 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 output pin should be larger than 20 kOhm. The capacitive load at the output pin must not be larger than 200 pF. If the design shows a larger capacity at the output pin an additional resistor is required in series at the output (e.g. 620 Ohm). Linear output Square Root output Formula: P = lfactor * (voltage(1) - 0.250)/3.750 Formula: P = rfactor * (voltage(1) -0.250)^2 lfactor = Pascal Inch water (1) SDP1000-L05 SDP1000-L 125 500 0.5 2 SDP2000-L 3500 14 rfactor = Pascal Inch water (1) voltage: measured output voltage in Volt. SDP1000-R 35.55556 0.14222 voltage: measured output voltage in Volt. For bi-directional SDP1000-L025 Formular: P=lfactor * (voltage - 2.10)/1.90 lfactor = 62 Pa or 0.25 Inch water 4.00 4.00 SDP1000-R / SDP2000-R SDP1000-L / SDP2000-L output voltage [V] output voltage [V] 3.00 2.00 1.00 0.00 0 20 40 60 80 100 3.00 2.00 1.00 0.00 0 differential pressure [% full scale] 40 60 80 100 differential pressure [% full scale] Figure 2: Linear output at 5 Vdc supply of the SDP1000-L and the SDP2000-L. The fine lines indicate the maximum tolerances including a temperature variation from 0 to 50C. www.sensirion.com 20 Figure 3: Square root extracted output of the SDP1000-R and the SDP2000-R at 5 Vdc supply. The fine lines indicate the maximum tolerances including a temperature variation from 0 to 50C. v5 February 2013 4/10 Table 4: SDP1000 / SDP2000 electrical characteristics. Parameter Conditions Min. Typ. Max. Units 5.0 5.25 VDC 4.3 5.2 mA 20 200 pF 20 100 k 4.75 V 5.0 V 5.25 V Units Power Supply Voltage VDD Operating Current 4.75 5 V, no load, zero flow Output capacitive load Cload Recommended load Rload Table 5: Typical power supply dependence of the offset and the sensitivity. Parameter Offset Sensitivity www.sensirion.com Device SDP1000-L05 - 0.4 + 0.4 SDP1000-L - 1.6 + 1.6 SDP2000-L - 10.3 + 10.3 SDP1000-L05 28 30 32 SDP1000-L 7.1 7.5 7.9 SDP2000-L 1.01 1.07 1.13 v5 February 2013 Pa mV/Pa 5/10 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) 5.2 5.4 (0.205) The physical dimensions and mounting information is given in Figure 4 and 5. A A 16.0 (0.630) (0.213) 3.4 (0.134) No Components inside this Area C H 30.5 (1.200) G I Lo 44.0 (1.732) Hi F B 2.54 (0.100) Pin# 1 2 3 D 1.8 (0.071) 30.0 (1.181) Function 1 2 3 VDD (5 Vdc) Ground OUT (0.25...4 Vdc) E 22.1 18.3 (0.870) (0.720) 13.1 (0.516) Pin# B SDP100000206-10033-250-001 Figure 4: Pin out and physical dimensions in mm (inch). The drawing is not to scale. 3.2 Soldering Instructions Dim. [mm] [inch] [mil] A 3.00 0.118 118 B C D E F G H I 3.30 1.20 10.20 28.20 2.54 0.60 0.50 22.70 0.130 0.047 0.402 1.110 0.100 0.024 0.020 0.894 130 47 402 1110 100 24 20 894 Figure 5: SDP1000 / SDP2000 PCB footprint. The drawing is not to scale. 103-L-SV) and to mount the SDP1000 / SDP2000 after soldering. The SDP1000 / SDP2000 differential pressure sensor can be wave soldered. Direct reflow soldering is not recommended since it may affect the accuracy. If reflow soldering is required Sensirion recommends to use an SMD connector (e.g. type Samtec SSM- www.sensirion.com v5 February 2013 6/10 3.3 Connecting Hose 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). 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 gas flow [sccm] 120 100 80 Length of the connecting hose Deviation of Measured Value 60 0.5 m (20 inch) - 0.4 % 40 1.0 m (40 inch) - 0.8 % 2.0 m (80 inch) - 1.6 % 4.0 m (160 inch) - 3.2 % 20 0 0 20 40 60 80 100 differential pressure [% full scale] Figure 6: Typical air flow through the SDP1000 / SDP2000. Please note: 1 sccm = 1 cm3/min at 0C and 1013 mbar pressure (1 sccm = 0.001 norm liter). 4 Figure 7: Influence of the length of the connecting hose on the accuracy (using 3/16 inch inner diameter). Example: a 50 Pa difference pressure is shown as 49.8 Pa when using 0.5 m tube with 3/16 inch diameter. Application Example: A High End Differential Pressure Sensor Vsupply 12V IC1 Example: 5V IC2 C1 C1 C2 Output Vout : 0...10 Vdc Range: 0...500 Pa, linear characteristics Power supply Vsupply: 14.5... 27 Vdc SDP1000 / SDP2000 1 1 2 2 3 3 R1 R1 5V 12V 12V 12V OP2 R2 OP1 R3 + - R1 OP3 + - + - R4 Vout R6 R1 R5 Component Value IC1 LM78L12 IC2 LP2980 SDP SDP1000 OP1, OP2, OP3 LMC6044 C1 200 nF C2 2.2 uF R1 10 k (5%, 10 ppm) R2 18 k (5%, 10 ppm) R3 1 k (5%, 10 ppm) R4 100 6 k (3x18 k 5%, 10 ppm in parallel) 10 k (5%, 10 ppm) R5 Vout = (VSDP - 5V * (R3/(R2+R3))) * (R5+R6)/R5 R6 Figure 8: Schematic of a high-end differential pressure transmitter using the SDP1000 / SDP2000. With only a few external components and no additional calibration the transmitter features an accurate and temperature compensated 0...10 Vdc output signal. (Component values not valid for SDP1000-L025.) www.sensirion.com v5 February 2013 7/10 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 0.62 mbar 0.25 "H20 0.009 PSI 1-100313-03 SDP1000-L05 Voltage 0.25 - 4.0 V, linear 125 Pa 1.25 mbar 0.5 "H20 0.018 PSI 1-100235-03 SDP1000-L Voltage 0.25 - 4.0 V, linear 500 Pa 5 mbar 2 "H20 0.07 PSI 1-100110-03 SDP2000-L Voltage 0.25 - 4.0 V, linear 3500 Pa 35 mbar 14 "H20 0.50 PSI 1-100113-03 SDP1000-R Voltage 0.25 - 4.0 V, square root 500 Pa 5 mbar 2 "H20 0.07 PSI 1-100111-03 SDPx000-OEM For high quantity OEM versions (e.g. with digital output), please contact Sensirion. 6 - Revision history Table 7: Revision history Date Version Page(s) Changes November 2002 January 2003 December 2004 Juni 2005 March 2006 March 2006 Preliminary v0.9 First release V2.6 V2.7 V2.8 V2.9 all all all all all 2,6 October 2006 May 2008 V3.0 V3.1 1,8,9 All September 2008 V4.0 2-5,8 October 2011 February 2013 V4.1 V5 1 all First preliminary release Specifications, typos, various small modifications Introduction type L05 Change of address, adjusted specifications for type L05 Introduction of Sensirion USA address, updated disclaimer New Calibration temperature: 23C. Change of barbs/ports diameter specification RoHS statement, Introduction of revision history in this document RoHS statement on page 3, New disclaimer on page 10, Contact addresses updated, Various small modifications, Inconsistency in Zero Pressure / Full Scale Output corrected SDP2000-R discontinued, new SDP1000-L025 implemented, power consumption, power supply dependence and temperature dependence changed due to new SF04 sensor chip version, article number index counted up due to new sensor chip version. Small linguistic adaptations. Block diagram changed Updated product number. Minor updates. Notes: www.sensirion.com v5 February 2013 8/10 Important Notices * Warning, personal injury Do not use this product as safety or emergency stop devices or in any other application where failure of the product could result in personal injury (including death). Do not use this product for applications other than its intended and authorized use. Before installing, handling, using or servicing this product, please consult the data sheet and application notes. Failure to comply with these instructions could result in death or serious injury. If the Buyer shall purchase or use SENSIRION products for any unintended or unauthorized application, Buyer shall defend, indemnify and hold harmless SENSIRION and its officers, employees, subsidiaries, affiliates and distributors against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if SENSIRION shall be allegedly negligent with respect to the design or the manufacture of the product. ESD Precautions The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation, take customary and statutory ESD precautions when handling this product. See application note "ESD, Latchup and EMC" for more information. Warranty SENSIRION warrants solely to the original purchaser of this product for a period of 12 months (one year) from the date of delivery that this product shall be of the quality, material and workmanship defined in SENSIRION's published specifications of the product. Within such period, if proven to be defective, SENSIRION shall repair and/or replace this product, in SENSIRION's discretion, free of charge to the Buyer, provided that: * notice in writing describing the defects shall be given to SENSIRION within fourteen (14) days after their appearance; * such defects shall be found, to SENSIRION's reasonable satisfaction, to have arisen from SENSIRION's faulty design, material, or workmanship; www.sensirion.com the defective product shall be returned to SENSIRION's factory at the Buyer's expense; and * the warranty period for any repaired or replaced product shall be limited to the unexpired portion of the original period. This warranty does not apply to any equipment which has not been installed and used within the specifications recommended by SENSIRION for the intended and proper use of the equipment. EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTH HEREIN, SENSIRION MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT. ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED. SENSIRION is only liable for defects of this product arising under the conditions of operation provided for in the data sheet and proper use of the goods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or stored not in accordance with the technical specifications. SENSIRION does not assume any liability arising out of any application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. All operating parameters, including without limitation recommended parameters, must be validated for each customer's applications by customer's technical experts. Recommended parameters can and do vary in different applications. SENSIRION reserves the right, without further notice, (i) to change the product specifications and/or the information in this document and (ii) to improve reliability, functions and design of this product. Copyright(c) 2001-2008, SENSIRION. CMOSens(R) is a trademark of Sensirion All rights reserved RoHS and WEEE Statement The SDP1000 family complies with requirements of the following directives: * EU Directive 2002/96/EC on waste electrical and electronic equipment (WEEE), OJ13.02.2003; esp. its Article 6 (1) with Annex II. * EU Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electricaland electronic equipment (RoHS), OJ 13.02.2003; esp. its Article 4. v5 February 2013 9/10 Headquarters and Sales Offices Sensirion AG Laubisruetistrasse 50 CH-8712 Staefa ZH Switzerland Phone: Fax: e-mail: Web: + 41 44 306 40 00 + 41 44 306 40 30 info@sensirion.com www.sensirion.com SENSIRION Inc Westlake Pl. Ctr. I, suite 240 2801 Townsgate Road Westlake Village, CA 91361 USA Phone: Fax: e-mail: Web: +1 805-409 4900 +1 805-435 0467 michael.karst@sensirion.com www.sensirion.com Sensirion Korea Co. Ltd. #1414, Anyang Construction Twr B/D 1112-1, Bisan-dong, Anyang-city Gyeonggi-Province, South Korea Phone: Fax: e-mail: Web: +82 31-440-9925~27 +82 31-440-9927 info@sensirion.co.kr www.sensirion.co.kr SENSIRION Japan Sensirion Japan Co. Ltd. Shinagawa Station Bldg. 7F 4-23-5 Takanawa Minato-ku, Tokyo, Japan phone: fax: e-mail: Web: +81 3-3444-4940 +81 3-3444-4939 info@sensirion.co.jp www.sensirion.co.jp www.sensirion.com v5 February 2013 10/10 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Sensirion: SDP1000-L SDP1000-L025 SDP1000-L05 SDP1000-R SDP2000-L