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Gauge pressure transducers Series/Type: AK2 series Ordering code: Date: 2009-08-03 Version: 3 EPCOS AG 2009. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited Content of header bars 1 and 2 of data sheet will be automatically entered in headers and footers! Please fill in the table and then change the color to "white". This ensures that the table disappears (invisible) for the customer PDF. Don't change formatting when entering or pasting text in the table and don't add any cell or line in and to it! Identification/Classification 1 (header 1 + top left bar): Pressure sensors Identification/Classification 2 (header 2 + bottom left header bar): Gauge pressure transducers Ordering code: (top right header bar) Series/Type: (top right header bar) AK2 series Preliminary data (optional): (if necessary) Department: AS SEN PD Date: 2009-08-03 Version: 3
Gauge pressure transducers AK2 series AS SEN PD 2009-08-03 Please read Cautions and warnings and Page 2 of 7 Important notes at the end of this document .
Description
/square6 The transducers are based on piezoresistive silicon pressure sensors from our own clean room. /square6 The robust stainless steel/plastic casing is accentuated through its excellent mechanical decoupling.
Features
/square6 Piezoresistive MEMS technology /square6 Measured media: and non-aggressive fluids. Unsuitable for substances which react with glass, silicon, stainless steel, silicone glue (p r ≤ 10 bar) or epoxy glue (p r > 10 bar). /square6 Whetstone bridge with mV output, proportional to pressure and ratiometric to supply voltage /square6 RoHS-compatible, halogen-free /square6 Dual-in-line package for PCB mounting Dimensional drawings Type KD (4.8 mm tube fitting) Type KC (M5 thread c onnection) All dimensions in mm
Gauge pressure transducers AK2 series AS SEN PD 2009-08-03 Please read Cautions and warnings and Page 3 of 7 Important notes at the end of this document . Technical data Absolute maximum ratings Parameter Symbol Conditions Min. Typ. Max. Unit Temperature ranges Storage temperature range T st 1) –40 +125 ° C Operating temperature range T a 2) –30 +85 ° C Soldering temperature T solder <5 s (no reflow soldering) +240 ° C Supply voltage /-current Supply voltage V DD 5) 10 V Parameter Symbol Conditions Min. Typ. Max. Unit Offset / bridge resistance @ T a = 25 ° C, V DD = 5 V Bridge resistance R S Chip type C41 (pin1-3) 4.0 5.0 6.0 kΩ Chip type C27 (pin1-3) 2.6 3.3 4.0 kΩ Chip type C28 (pin1-3) 2.7 3.2 3.7 kΩ Offset V 0 6) –25 0 +25 mV Data in temperature range @ T a = –30 ... 85 ° C, V DD = 5 V Temperature hysteresis 9) ±0.1 ±0.5 % FS Temperature coefficients of the α Rs 10) 2.1 2.4 2.7 10 -3/K bridge resistance β Rs 4 6 8 10 -6/K 2 Temperature coefficients of the α S 11) –2.4 –2.2 –2.0 10 -3/K sensitivity β S 3 5 8 10 -6/K 2 Temperature coefficient of offset TCV 0 12) ±4 µV/VK Data dependent on rated pressure @ T a = 25 ° C, V DD = 5 V Rated pressure p r 3) Chip type Sensitivity S 7) Nonlinearity L 8) Overpressure p ov 4) bar Min. mV/bar Typ. mV/bar Max. mV/bar Typ. % FS Max. % FS Min. bar 0.025 C41 640 1000 1280 ±1 ±1.75 0.25 0.060 C41 450 700 833 ±0.75 ±1.5 0.35 0.100 C27 350 500 700 ±0.5 ±1 0.5 0.250 C27 300 400 480 ±0.5 ±1 0.6 0.400 C27 225 300 375 ±0.5 ±1 1 1.000 C27 90 120 150 ±0.25 ±0.5 3 2.500 C28 36 48 60 ±0.25 ±0.5 5 6.000 C28 15 20 25 ±0.25 ±0.5 9 10.00 C28 9 12 15 ±0.25 ±0.5 24
Gauge pressure transducers AK2 series AS SEN PD 2009-08-03 Please read Cautions and warnings and Page 4 of 7 Important notes at the end of this document . Terminal assignment Pin Symbol Terminal assignment
1 V DD+ Supply voltage
2 V out+ Output voltage
3 V DD– Supply voltage
4 V out– Output voltage
1 VDD+
2 Vout+
4 Vout–
3 VDD–
The polarity of V out applies to positive pressure. Negative pressure or a reversed supply voltage results in a reversed polarity of the output voltage V out . Rated pressures and ordering codes Type Type KD Type KC Rated pressure p r bar 0.025 0.060 0.100 0.250 0.400 1.000 2.500 6.000 10.00 25.00 0.025 0.060 0.100 0.250 0.400 1.000 2.500 6.000 10.00 25.00 Product type AKR 0.025 D20 AKR 0.060 D20 AKR 0.100 D40 AKR 0.250 D40 AKR 0.400 D40 AKR 1.000 D40 AKR 2.500 D80 AKR 6.000 D80 AKR 10.00 D80 AKR 25.00 D80 AKR 0.025 C20 AKR 0.060 C20 AKR 0.100 C40 AKR 0.250 C40 AKR 0.400 C40 AKR 1.000 C40 AKR 2.500 C80 AKR 6.000 C80 AKR 10.00 C80 AKR 25.00 C80 Ordering code B58611K1100A001 B58611K1100A002 B58611K1100A003 B58611K1100A004 B58611K1100A005 B58611K1100A006 B58611K1100A007 B58611K1100A008 B58611K1100A009 B58611K1100A010 B58611K1500A007 B58611K1500A008 B58611K1500A009 B58611K1500A010 B58611K1500A011 B58611K1500A012 B58611K1500A013 B58611K1500A014 B58611K1500A015 B58611K1500A016 Other rated pressures upon request.
Gauge pressure transducers AK2 series AS SEN PD 2009-08-03 Please read Cautions and warnings and Page 5 of 7 Important notes at the end of this document . Symbols and terms 1) Storage temperature range T st A storage of the pressure sensor within the temperature range Tst,min up to T st,max and without applied pressure and supply voltage will not affect the performance of the pressure sensor. 2) Operating temperature range T a An operation of the pressure sensor within the temperature range Ta,min up to T a,max will not affect the performance of the pressure sensor. 3) Rated pressure p r Within the rated pressure range 0 up to p r the signal output characteristic corresponds to this specification. 4) Overpressure p OV Pressure cycles within the pressure range 0 up to p ov will not affect the performance of the pressure sensor. 5) Supply voltage V DD VDD,max is the maximum permissible supply voltage, which can be applied without damages. The output voltage Vout is ratiometric (V out ~ V DD ). 6) Offset V 0 The offset V 0 is the signal output V out (p = 0) at zero pressure. 7) Sensitivity S Within the pressure range 0 up to p r the output voltage is V out (p x) = V0 + S · p x 8) Nonlinearity L (including pressure hysteresis) The nonlinearity is the deviation of the real sensor characteristic Vout = f(p) from the ideal straight line. It can be approximated by a polynomial of second order, with the maximum at p x = p r / 2 . The equation to calculate the nonlinearity is: r x 0rout 0xout p p V)p (V V)p (VL −− 9) Temperature hysteresis The temperature hysteresis is the change of offset, starting from the value at 25 ° C after a temperature change and return to 25 ° C. Determined during temperature cycles in operating temperature range (cycles with 1 K/min). (Full Scale): FS = V FS = S · pr 10) Temperature coefficients of the bridge resistance αα αα RS , ββ ββ RS Bridge resistance at temperature T x: RS(T x) = RS(25 ° C) · [ 1 + α RS · (T x – 25 ° C) + β RS · (T x – 25 ° C) 2 ] Values are valid within the operating temperature range Ta,min up to T a,max Out of the operating temperature range, the deviation may increase. 11) Temperature coefficients of the sensitivity αα αα S, ββ ββ S Sensitivity at temperature T x: S(T x) = S(25 ° C) · [ 1 + α S · (T x – 25 ° C) + β S · (T x – 25 ° C) 2 ] Values are valid within the operating temperature range Ta,min up to T a,max Out of the operating temperature range, the deviation may increase. 12) Temperature coefficient of offset TCV 0 Offset at temperature T x: V0(T x) = V0(25 ° C) + TCV 0 · (T x – 25 ° C) · V DD Values are valid within the operating temperature range Ta,min up to T a,max Out of the operating temperature range, the deviation may increase.
Gauge pressure transducers AK2 series AS SEN PD 2009-08-03 Please read Cautions and warnings and Page 6 of 7 Important notes at the end of this document . Cautions and warnings Storage (general) All pressure sensors should be stored in their origi nal packaging. They should not be placed in harmful environments such as corrosive gases nor exposed to heat or direct su nlight, which may cause deformations. Similar effect s may result from extreme storage temperatures and climatic condition s. Avoid storing the sensor dies in an environment w here condensation may form or in a location exposed to corrosive gase s, which will adversely affect their performance. Pl astic materials should not be used for wrapping/packing when storing or tr ansporting these dies, as they may become charged. Pressure sensor dies should be used soon after opening their seal and packaging. Operation (general) Media compatibility with the pressure sensors must be ensured to prevent their failure. The use of oth er media can cause damage and malfunction. Never use pressure sensors in atmospheres containing explosive liquids or gases. Ensure pressure equalization to the environment, if gauge pressure sensors are used. Avoid operating the pressure sensors in an environment where condensation may form or in a location exposed to corrosive gases. These environments adversely affect their performance. If the operating pressure is not within the rated p ressure range, it may change the output characteris tics. This may also happen with pressure sensor dies if an incorrect mo unting method is used. Be sure that the applicable p ressure does not exceed the overpressure, as it may damage the pressure sensor. Do not exceed the maximum rated supply voltage nor the rated storage temperature range, as it may dama ge the pressure sensor. Temperature variations in both the ambient conditio ns and the media (liquid or gas) can affect the acc uracy of the output signal from the pressure sensors. Be sure to check t he operating temperature range and thermal error sp ecification of the pressure sensors to determine their suitability for the application. Connections must be wired in accordance with the te rminal assignment specified in the data sheets. Car e should be taken as reversed pin connections can damage the pressure transmitters or degrade their performance. Contact between the pressure sensor terminals and metals or other materials may cause errors in the output characteristics. Design notes (dies) This specification describes the mechanical, electr ical and physical requirements of a piezoresistive sensor die for measuring pressure. The specified parameters are va lid for the pressure sensor die with pressure appli cation either to the front or back side of the diaphragm as described in the data sheet. Pressure application to the other s ide may result in differing data. Most of the parameters are influenc ed by assembly conditions. Hence these parameters a nd the reliability have to be specified for each specific application and tested over its temperature range by the customer. Handling/Mounting (dies) Pressure sensor dies should be handled appropriately and not be touched with bare hands. They should on ly be picked up manually by the sides using tweezers. Their top sur face should never be touched with tweezers. Latex g loves should not be used for handling them, as this will inhibit the cu ring of the adhesive used to bond the die to the ca rrier. When handling, be careful to avoid cuts caused by the sharp-edged ter minals. The sensor die must not be contaminated dur ing manufacturing processes (gluing, soldering, silk-screen process). The package of pressure sensor dies should not to b e opened until the die is mounted and should be clo sed after use. The sensor die must not be cleaned. The sensor die must not be damaged during the assembly process (especially scratches on the diaphragm). Soldering (transducers, transmitters) The thermal capacity of pressure sensors is normall y low, so steps should be taken to minimize the eff ects of external heat. High temperatures may lead to damage or changes in characteristics. A non-corrosive type of flux resin should normally b e used and complete removal of the flux is recommen ded. Avoid rapid cooling due to dipping in solvent. Note that the output signal may change if pressure is ap plied to the terminals during soldering. This listing does not claim to be complete, but merely reflects the experience of EPCOS AG.
The following applies to all products named in this publication: 1. Some parts of this publication contain statements about the suitability of our products fo r certain areas of application . These statements are based on our knowledge of ty pical requirements that are often placed on our products in the areas of application concerned. We nevertheless expressly point out that such statements cannot be regarded as binding statements about the suitability of our products fo r a particular customer application. As a rule, EPCOS is either unfamiliar with individual cu stomer applications or less familiar with them than the customers themselves. For these reasons, i t is always ultimately incumbent on the customer to check and decide whether an EPCOS produ ct with the properties described in the product specification is suitable for use in a particular customer application. 2. We also point out that in individual cases, a malfunction of electronic c omponents or failure before the end of their usual service life cannot be completely ruled out in the current state of the art, even if they are operated as specified. In customer applications requiring a very high level of operational safety and especially in custo mer applications in which the malfunction or failure of an electronic component could endanger h uman life or health (e.g. in accident prevention or life-saving systems), it must therefore be ensured by means of suitable design of the customer application or other action taken by the c ustomer (e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by third parties in the event of malfunction or failure of an electronic component. 3. The warnings, cautions and product-specific notes must be observed. 4. In order to satisfy certain technical requiremen ts, some of the products described in this publication may contain substances subject to restr ictions in certain jurisdictions (e.g. because they are classed as hazardous) . Useful information on this will be found in our Material Data Sheets on the Internet (www.epcos.com/material ). Should you have any more detailed questions, please contact our sales offices. 5. We constantly strive to improve our products. Co nsequently, the products described in this publication may change from time to time . The same is true of the corresponding product specifications. Please check therefore to what exte nt product descriptions and specifications contained in this publication are still applicable before or when you place an order. We also reserve the right to discontinue production and delivery of products . Consequently, we cannot guarantee that all products named in this publication will always be available. The aforementioned does not apply in the case of in dividual agreements deviating from the foregoing for customer-specific products. 6. Unless otherwise agreed in individual contracts, all orders are subject to the current version of the “General Terms of Delivery for Products and Ser vices in the Electrical Industry” published by the German Electrical and Electronics Industry Association (ZVEI) . 7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSMP, CSSP, CTVS, DSSP, MiniBlue, MiniCell, MKK, MLSC, MotorCap, PCC, PhaseCap, Phase Cube, PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SIMID, SineFormer , SIOV, SIP5D, SIP5K, ThermoFuse, WindCap are trademarks registered or pending in Europe and in other countries. Further information will be found on the Internet at www.epcos.com/trademarks.