www.sensirion.com sensirion - the sensor company sdp1000 / sdp2000 low range differential pressure sensor for air and non-aggressive gases data sheet C v 5 ? for cost sensitive hvac and medical oem applicati ons ? 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 characteri stics available ? not sensitive to the mounting orientation ? direct pcb mounting with simple snap-on system sdp1000 / sdp2000 product summary the sdp1000 / sdp2000 differential pressure sensors for air cover the following measurement ranges: C5 to 125 pa (0.5 inch h 2 o), -20 to 500 pa (2 inch h 2 o), and - 100 to 3500 pa (14 inch h 2 o). mounted in a rugged, chemically inert pps housing t he sdp1000 / sdp2000 differential pressure sensors feature a unique dynamic range, zero offset and unsurpassed long term stability. this makes it an i deal fit for demanding yet cost sensitive oem applications in hvac and medical equipment. the devices are supplied with 5.0 v and provide a 0.254.0 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 i n 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 compone nts 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 sensirions proprietary cmosens ? sensor technology which combines the sensor element with amplification and a/d conversion on one single silicon chip. the differen tial pressure is measured by a thermal sensor element. i n contrast to other thermal differential pressure sen sors 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 add ition the sdp1000 / sdp2000 is robust against pressure bursts and shows no sensitivity to the mounting orientation. sdp1000 / sdp2000 is fully rohs compliant. applications - medical - hvac - automotive - process automation block diagram differential pressure sensor cmosens ? sensor chip digital linearization and temperature compensation a/d converter memory d/a converter v dd 5.0 v out 0.25 v to 4 v gnd actual size
www.sensirion.com v5 february 2013 2/10 1 specifications table 1: sensor specifications (at 23c and p absolute = 966 mbar, vdd = 5.0 v unless otherwise noted). parameter sdp1000-l025 sdp1000-l05 sdp1000-l sdp1000-r sdp200 0-l unit min typ max min typ max min typ max min typ max min typ max measurement range -62 62 -5 125 - 20 500 - 20 500 -100 3500 pa -0.25 0.25 -0.02 0.5 -0.08 2 -0.08 2 -0.4 14 inch water power supply (see tab 4) 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 full scale output (100 k w load) typ. 4.00v at +62pa typ. 0.20v at C62pa 4.00 4.00 4.00 4.00 v zero pressure output 2.10 0.250 0.250 0.250 0.250 v accuracy (also see figure 1) 0.5 0.6 0.2 0.3 0.1 0.2 0.2 0.3 0.1 0.2 % fs (1)(2) 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 additional error over temperature (t 23c) 0.003 0.006 0.003 0.006 0 0 0 0 0 0 % fs/c (2) 0.03 0.05 0.03 0.05 0.03 0.05 0.03 0.05 0.03 0 .05 % m.v./c resolution < 30% fs (1) 0.05 0.1 0.2 0.05 0.1 0.2 0.05 0.1 0.2 0.05 0.1 0.2 0.2 0.5 1 pa resolution 30..70% fs (1) 0.2 0.5 1.5 0.2 0.5 1.5 1 2.5 8 pa resolution > 70% fs (1) 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 i s 500 pa (2 h2o), for the sdp1000-l025 it is 62 pa (0.25 h2o), (3) see 2.2 voltage output formula for conversion figure 1: accuracy (includes errors caused by offs et, linearity, hysteresis and repeatability) of the sdp1000 -l (1) , (2) compared with typical membrane sensors (3). figure 2: max. repeatability and offset drift/yea r of the sdp1000-l (1) compared with two typical membrane based sensors (2,3). 0 1 2 3 4 5 6 7 8 9 10 0 10 20 30 40 50 60 70 80 90 100 error [ % of measured value] differential pressure [% full scale] 0 1 2 3 4 5 6 7 0 1 2 3 4 offset drift/year [pa] repeatability [pa] (1) (2) (3) (1) sdp1000 - l (2,3) membrane based sensors 1 2 3 (1) sdp1000 / sdp2000 around 23c (2) sdp1000 / sdp2000 between 0?50c (3) typical membrane based sensor with 1.5% fs error between 10?40c
www.sensirion.com v5 february 2013 3/10 table 2: additional sensor specifications. media air, n 2 C for other gases contact sensirion ag. operating conditions: - temperature - humidity -10 c +60 c / 14f 140 f non-condensing ambient storage conditions 1 -40 c +80 c / -40f 176 f orientation sensitivity below resolution response time 40 ms (for faster response time conta ct sensirion) admissible overpressure (short term) 1 bar (14.5 ps i) burst pressure capability 2 bar (29 psi) weight 14 g protection class ip 20 wetted materials glass (silicon nitride, silicon oxide), silicon, pp s (polyphenylene sulfide), peek (polyetheretherketone), fr4, silicone as stati c sealing, epoxy, gold gas flow through sensor see figure 6. lead free the sdp1000 family is fully rohs complian t (1) for maximum 2 weeks 1.1 temperature compensation the sdp1000 / sdp2000 differential pressure sensors feature a sophisticated built-in temperatur e 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 th e cmosens ? 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 fl ow through the sensor. this results in a dependence of the indicated differential pressure on the ambient air density. while the temperature effect is compensate d (see paragraph 1.1) the altitude above sea level ha s an influence on the sdp1000 / sdp2000 output. if desired, this effect can be compensated by a correction factor according to the following equati on: dp eff = dp sensor * p cal / p amb where dp eff is the effective differential pressure, dp sensor the differential pressure indicated by the sdp1000 / sdp2000, p cal the absolute pressure during calibration (966 mbar) and p amb the actual ambient absolute pressure. this leads to the following correction factors: table 3: altitude correction factors. altitude [meter] ambient pressure (p amb ) [mbar] correction factor p cal / p amb 0 1013 0.95 250 984 0.98 425 966 1.00 500 958 1.01 750 925 1.04 1500 842 1.15 2250 766 1.26 3000 697 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 dp sensor = 33.3 pa. taking into account the correction factor p cal / p amb = 1.04 the effective differential pressure dp eff is 33.3 pa * 1.04 = 34.6 pa. note: in many hvac applications such as filter monitoring , fan/ventilator control or air flow measurement the described effect is actually welcome since at the e nd the mass flow and not volume flow is the effective value to control.
www.sensirion.com v5 february 2013 4/10 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 of fset 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 volta ge 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 wi th 0.2 to 4.0 v output. the resistive load at the output pin should be larg er 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 res istor is required in series at the output (e.g. 620 ohm). linear output formula: p = lfactor * (voltage (1) C 0.250)/3.750 lfactor = sdp1000 - l05 sdp1000 - l sdp2000 - l pascal 125 500 3500 inch water 0.5 2 14 (1) voltage: measured output voltage in volt. for bi-directional sdp1000-l025 formular: p=lfactor * (voltage C 2.10)/1.90 lfactor = 62 pa or 0.25 inch water square root output formula: p = rfactor * (voltage (1) -0.250)^2 rfactor = sdp1000 - r pascal 35.55556 inch water 0.14222 (1) voltage: measured output voltage in volt. 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. figure 3: square root extracted output of the sdp10 00 - r and the sdp2000-r at 5 vdc supply. the fine lines indicate the maximum tolerances including a temperature variation from 0 to 50c . 0.00 1.00 2.00 3.00 4.00 0 20 40 60 80 100 output voltage [v] differential pressure [% full scale] 0.00 1.00 2.00 3.00 4.00 0 20 40 60 80 100 output voltage [v] differential pressure [% full scale] sdp1000-l / SDP2000-L sdp1000-r / sdp2000-r
www.sensirion.com v5 february 2013 5/10 table 4: sdp1000 / sdp2000 electrical characteristi cs. parameter conditions min. typ. max. units power supply voltage v dd 4.75 5.0 5.25 vdc operating current 5 v, no load, zero flow 4.3 5.2 ma output capacitive load c load 20 200 pf recommended load r load 20 100 k w table 5: typical power supply dependence of the off set 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 v5 february 2013 6/10 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 ps i). burst pressure is > 2 bar (29 psi) the physical dimensions and mounting information is given in figure 4 and 5. figure 4: pin out and physical dimensions in mm (inch). the drawing is not to scale. figure 5: sdp1000 / sdp2000 pcb footprint. the drawing is not to scale. 3.2 soldering instructions the sdp1000 / sdp2000 differential pressure sensor can be wave soldered. direct reflow soldering is no t recommended since it may affect the accuracy. if reflow soldering is required sensirion recommend s to use an smd connector (e.g. type samtec ssm- 103-l-sv) and to mount the sdp1000 / sdp2000 after soldering. 3.4 (0.134) 5.4 (0.213) 2.54 (0.100) 16.0 (0.630) 44.0 (1.732) sdp100000206-10033-250-001 hi lo 1.8 (0.071) 30.0 (1.181) pin# 1 2 3 a g c f d e h i no components inside this area b b a 22.1 (0.870) dim. [mm] [inch] [mil] a 3.00 0.118 118 b 3.30 0.130 130 c 1.20 0.047 47 d 10.20 0.402 402 e 28.20 1.110 1110 f 2.54 0.100 100 g 0.60 0.024 24 h 0.50 0.020 20 i 22.70 0.894 894 pin# function 1 vdd (5 vdc) 2 ground 3 out (0.254 vdc) 18.3 (0.720) 30.5 (1.200) 5.2 (0.205) 13.1 (0.516)
www.sensirion.com v5 february 2013 7/10 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 % erro r of the measured value (figure 7). figure 6: typical air flow through the sdp1000 / sd p2000. please note: 1 sccm = 1 cm 3 /min at 0c and 1013 mbar pressure (1 sccm = 0.001 norm liter). 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. 4 application example: a high end differential pressu re sensor example: output v out : 010 vdc range: 0500 pa, linear characteristics power supply v supply : 14.5 27 vdc component value ic 1 lm78l12 ic 2 lp2980 sdp sdp1000 op 1 , op 2 , op 3 lmc6044 c 1 200 nf c 2 2.2 uf r 1 10 k w (5%, 10 ppm) r 2 18 k w (5%, 10 ppm) r 3 1 k w (5%, 10 ppm) r 4 100 w r 5 6 k w (3x18 k w 5%, 10 ppm in parallel) r 6 10 k w (5%, 10 ppm) figure 8: schematic of a high-end differential pres sure transmitter using the sdp1000 / sdp2000. with only a few external components and no additional calibration the transm itter features an accurate and temperature compensa ted 010 vdc output signal. (component values not valid for sdp1 000-l025.) 0 20 40 60 80 100 120 0 20 40 60 80 100 gas flow [sccm] differential pressure [% full scale] ic 1 ic 2 v supply 5v + - + - + - 5v 12v v out sdp1000 / sdp2000 c 1 c 2 c 1 r 1 r 1 r 2 r 3 r 1 r 1 r 4 r 6 r 5 op 1 op 2 op 3 v out = (v sdp C 5v * (r 3 /(r 2 +r 3 ))) * (r 5 +r 6 )/r 5 1 2 3 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 % 1 2 3 12v 12v 12v
www.sensirion.com v5 february 2013 8/10 5 ordering information when ordering sdp1000 / sdp2000 differential pressu re sensors please refer to the following part names and article numbers. for the latest product information and loc al distributor check out sensirions website on http://www.sensirion.com table 6: overview ordering information part name output range (full scale) article number sdp1000-l025 voltage 0.2 C 4.0 v, linear 62 pa 0.62 mbar 0.25 "h 2 0 0.009 psi 1-100313-03 sdp1000-l05 voltage 0.25 - 4.0 v, linear 125 pa 1.2 5 mbar 0.5 "h 2 0 0.018 psi 1-100235-03 sdp1000-l voltage 0.25 - 4.0 v, linear 500 pa 5 mba r 2 "h 2 0 0.07 psi 1-100110-03 SDP2000-L voltage 0.25 - 4.0 v, linear 3500 pa 35 m bar 14 "h 2 0 0.50 psi 1-100113-03 sdp1000-r voltage 0.25 - 4.0 v, square root 500 pa 5 mbar 2 "h 2 0 0.07 psi 1-100111-03 sdpx000-oem for high quantity oem versions (e.g. wi th digital output), please contact sensirion. - 6 revision history table 7: revision history date version page(s) changes november 2002 preliminary v0.9 all first preliminary release january 2003 first release all specifications, typos, various small modifications december 2004 v2.6 all introduction type l05 juni 2005 v2.7 all change of address, adjusted specifications for type l05 march 2006 v2.8 all introduction of sensirion usa address, updated disc laimer march 2006 v2.9 2,6 new calibration temperature: 23c. change of barbs/ ports diameter specification october 2006 v3.0 1,8,9 rohs statement, introduction of revision history in this document may 2008 v3.1 all rohs statement on page 3 , new disclaimer on page 10 , contact addresses updated, various small modifications, inc onsistency in zero pressure / full scale output corrected september 2008 v4.0 2 - 5,8 sdp2000 - r discontinued, new sdp1000 - l025 implemented, power consumption, power supply dependence and temperatur e dependence changed due to new sf04 sensor chip version, articl e number index counted up due to new sensor chip version. small li nguistic adaptations. october 2011 v4.1 1 block diagram changed february 2013 v5 all updated product number. minor updates. notes:
www.sensirion.com v5 february 2013 9/10 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 a ll claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectl y, any claim of personal injury or death associated with s uch unintended or unauthorized use, even if sensirion shall be allegedly negligent with respect to the de sign or the manufacture of the product. esd precautions the inherent design of this component causes it to be sensitive to electrostatic discharge (esd). to prev ent esd-induced damage and/or degradation, take customary and statutory esd precautions when handling this product. see application note esd, latchup and emc for mor e information. warranty sensirion warrants solely to the original purchaser of this product for a period of 12 months (one year) f rom the date of delivery that this product shall be of the quality, material and workmanship defined in sensirions published specifications of the product . within such period, if proven to be defective, sensirion shall repair and/or replace this product, in sensirions 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 sensirions reasonable satisfaction, to have arisen from sensirions faulty design, material, or workmanship; the defective product shall be returned to sensirions factory at the buyers 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 produc t arising under the conditions of operation provided for in the data sheet and proper use of the goods. sensirion explicitly disclaims all warranties, expr ess or implied, for any period during which the goods a re operated or stored not in accordance with the techn ical specifications. sensirion does not assume any liability arising out of any application or use of any product or circuit an d specifically disclaims any and all liability, inclu ding without limitation consequential or incidental dama ges. all operating parameters, including without limitat ion recommended parameters, must be validated for each customers applications by customers technical experts. recommended parameters can and do vary in different applications. sensirion reserves the right, without further notic e, (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 ? 2001-2008, sensirion. cmosens ? is a trademark of sensirion all rights reserved rohs and weee statement the sdp1000 family complies with requirements of th e 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.
www.sensirion.com v5 february 2013 10/10 headquarters and sales offices sensirion ag phone: + 41 44 306 40 00 laubisruetistrasse 50 fax: + 41 44 306 40 30 ch-8712 staefa zh e-mail: info@sensirion.com switzerland web: www.sensirion.com sensirion inc phone: +1 805-409 4900 westlake pl. ctr. i, suite 240 fax: +1 805-435 0467 2801 townsgate road e-mail: michael.karst@sensirion.com westlake village, ca 91361 web: www.sensirion.com usa sensirion korea co. ltd. phone: +82 31-440-9925~27 #1414, anyang construction twr b/d fax: +82 31-440 -9927 1112-1, bisan-dong, anyang-city e-mail: info@sensirion.co.kr gyeonggi-province, web: www.sensirion.co.kr south korea sensirion japan phone: +81 3-3444-4940 sensirion japan co. ltd. fax: +81 3-3444-4939 shinagawa station bldg. 7f e-mail: info@sensirion.co.jp 4-23-5 takanawa web: www.sensirion.co.jp minato-ku, tokyo, japan
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