BMD040-3MP

BMD040 BMD040 Analog pressure sensor Data sheet Bosch Sensortec Data sheet BMD040 Data sheet Order code 0 273 300 139 Package type TO-8 Data sheet version 1.3 Release date 23 October 2008 Document number BST-BMD040-DS000-03 Notes Rev. 1.3 Specification subject to change without notice. Proprietary information, not Page - proprietaryProduct information 23 October 2008 intended for 1publication. photos and pictures are for illustration purposes and may differ from therights. real product’s © Bosch Sensortec GmbH reserves all rights evenonly in the event of industrial property We reserve appearance. all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 Bosch Sensortec BMD040 - High precision 3MPa absolute pressure sensor Key features • • • • • • • • High precision barometric pressure sensor Pressure range: 50 … 3,000kPa TO-8 metal can package Fully calibrated Temperature compensated Fast ratiometric analog output technology ESD-protection and short circuit protected Inverse polarity protected up to 300mA supply current and on board diagnosis capability due to high driver output • Temperature range -30 ... +100°C • RoHS-compliant Typical applications • • • • HVAC (heating, ventilation, air-conditioning) Fuel pressure measurement Air pressure measurement Hydraulic pressure measurement General description The BMD040 analog output, absolute pressure sensor comprises a piezo-resistive pressure sensor element and a circuitry for signal amplification and temperature compensation. Both components are integrated on a single silicon chip. The active surface of the silicon chip is exposed to a reference vacuum that is formed by an evacuated TO-type housing. The medium to be measured is led up by a pressure nozzle to the back side of the diaphragm, which is resistant to most of the measured media. Rev. 1.3 Page 2 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 Bosch Sensortec Table of contents 1 DATA..................................................................................................................................... 4 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 MAXIMUM RATINGS OF PRESSURE SENSOR......................................................................... 4 OPERATING CHARACTERISTICS OF PRESSURE SENSOR ....................................................... 4 SIGNAL EVALUATION .......................................................................................................... 5 SIGNAL RANGE CHECK ....................................................................................................... 5 TRANSFER FUNCTION OF PRESSURE SENSOR ..................................................................... 6 ACCURACY OF PRESSURE SENSOR .................................................................................... 7 DATA OF CLK PIN ............................................................................................................ 8 TYPICAL TEMPERATURE DEPENDENCE OF CLK-PIN (SCHEMATIC) ....................................... 8 2 INSTALLATION INSTRUCTIONS......................................................................................... 9 3 ASSEMBLY INSTALLATION.............................................................................................. 10 4 MAXIMUM STORAGE TIME ............................................................................................... 11 5 PIN ASSIGNMENT .............................................................................................................. 12 6 PACKAGE........................................................................................................................... 13 7 LEGAL DISCLAIMER ......................................................................................................... 14 7.1 7.2 7.3 8 PRODUCT USE ................................................................................................................ 14 ENGINEERING SAMPLES................................................................................................... 14 APPLICATION EXAMPLES AND HINTS ................................................................................. 14 DOCUMENT HISTORY AND MODIFICATION ................................................................... 15 Rev. 1.3 Page 3 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet Bosch Sensortec BMD040 1 Data (valid for BMD040 only, not for module) 1.1 Maximum ratings of pressure sensor Parameter Condition Value Unit Max. time US,max. 16 V 1 min Pressure (burst pressure) pabs,max. 9000 kPa 1 min Proven pressure P_prov 4500 kPa 1 min. Temperature t -40/+130 °C 100 h Storage Temperature T -30/+120 °C < 6 weeks Supply Voltage The output is resistant to short circuit to 0 V respectively 5 V. The sensor is resistant to reverse voltage for 5 min at room temperature, as the maximum current is limited to 0.3 A. 1.2 Operating characteristics of pressure sensor Parameter Symbol Value min. Pressure range typ. Unit max. pabs 50 3000 kPa t -30 100 °C Supply voltage US 4.75 5.0 5.25 V Supply current at US = 5 V lS 6.0 9.0 12.5 mA Output load current lL -1.0 0.5 mA Rpull-up Rpull-down 5.0 10.0 Temperature range Load resistance to US or to ground Load capacitance Response time kΩ kΩ CL 12 nF T10/90 1.0 ms Lower limit at US = 5 V Uout,min. 0.25 0.3 0.35 V Upper limit at US = 5 V Uout,max. 4.65 4.7 4.75 V Rlo 2.4 4.7 8.2 kΩ Output resistance to US, ground Rhi open 1) 1) valid only for measuring voltage < 0.5V 3.4 5.3 8.2 kΩ Output resistance to ground, US open 1) Rev. 1.3 Page 4 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 1.3 Bosch Sensortec Signal evaluation The pressure sensor supplies an analogue output signal, which is ratiometric to the supply voltage. An RC low-pass filter with for instance τ = 2ms is recommended as an input circuitry for the following electronics in order to suppress possibly disturbing harmonic vibrations. The output voltage of the CLK PIN (to be measured using a high input impedance > 2MΩ, e.g. buffer with subsequent filtering) is decreasing with increasing temperature. Proper signal evaluation is performed by applying 10nF capacitors between VDD and GND and between OUT and GND. Maximum total capacitive load on the OUT-pin must be below 25nF (including the 10nF mentioned before). 1.4 Signal range check The electric output of the sensor is designed in such a way, that failures in function by cable breaks or short circuits can be detected by a suitable input circuitry of the following electronics. For the signal range check the diagnosis ranges beyond the characteristic limits are provided. Example of circuitry for detection of several kinds of failures by signal out of characteristic limits: CLK Buffer & filter Figure 1. Application note (example) Rev. 1.3 Page 5 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 1.5 Bosch Sensortec Transfer function of pressure sensor Uout = (c1* pabs + c0) * US where Uout US pabs c0 c1 = = = = = signal output voltage in V supply voltage in V absolute pressure in kPa 0.0864407 0.0002712 3000 Figure 2. Characteristics at US = 5.000 V (schematic view) Rev. 1.3 Page 6 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet Bosch Sensortec BMD040 1.6 Accuracy of pressure sensor 120 90 Tolerance [kPa] -90 -120 Absolute pressure [kPa] 50 3000 2000 Figure 3. Characteristic tolerance (2s values) 1,38 Factor 1,0 -30 0 Temperature [°C] 100 70 Figure 4. Tolerance broadening as a function of temperature (schematic view) Rev. 1.3 Page 7 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 Bosch Sensortec Including all temperature and pressure tolerances a total tolerance over the whole temperature and pressure range of in total ±4,75% as 2s-value has to be taken into account. 1.7 Data of CLK PIN • • • UCLK is 4 times threshold voltage of one diode without additional measures for temperature compensation, linearization, etc. UCLK gives an indication about temperature dependence Measurement of UCLK should be using a high ohmic impedance (e. g. buffer), subsequent filtering is recommended Typical temperature dependence of CLK-PIN (schematic) 1.8 UCLK temperature Figure 5. Characteristic UCLK = f(t), typical behaviour • • Typical dependence of output voltage is approximately -8mV/K Typical output voltage range of CLK pin at room temperature is 2.6V to 3.0V Rev. 1.3 Page 8 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 2 Bosch Sensortec Installation instructions The sensor is designed for attachment to a plane surface. The pressure nozzle might be sealed in some applications by an O-ring and might be fixed to a PCB or something similar. The hole in the fixture on customer side and the fastening must be designed in accordance to the offer drawing so that a long-term, leak proof seal at the port to the measured medium are guaranteed (if leakage is required). The recommended installation position is pressure port inclined downwards, installation only on clean side. Potentially freezing media and condensate are not allowed to accumulate at the pressure port and may not be introduced on transport and assembly either. In the interest of good continuity on the connectors, it is essential that not only the connector on the component side is according to specification, but that the material quality and exact fit of a cable harness connector (if such one is used) or another connector are also guaranteed. Any connector should therefore be according to the Bosch Sensortec offer drawing specification. When mounting the BMD040 to a printed circuit board (PCB) special care has to be taken in order to stay below a certain temperature budget during the soldering process. For further details on the recommended soldering conditions for the BMD040, please contact Bosch Sensortec. Rev. 1.3 Page 9 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 3 Bosch Sensortec Assembly installation In order to avoid deterioration or pre-damage of the sensor at the user following points have to be absolutely noticed: a) It has to be ensured that the O-ring (if an O-ring is used) will not be damaged at assembly. Only a thin film of ‘Shell Ondina Oil 68’ or light engine oil (5W20) may be applied as lubricant. Don't use silicone based lubricants. b) The sensor must not be mounted with striking tools (e.g. hammer). The maximum allowed force at the pins is 10N. In order to avoid leakage through the glass isolation around the pins, use as low as possible forces. c) When the assembly unit is exposed to a leakage test, don't exceed maximum overpressure. d) At immersion test plug connector and pressure port for protection against water ingress. e) Avoid reverse voltage and over-voltage when electrical tests are applied to the sensor. f) It is recommended to keep the distance between the TO-8-bottom plate and the PCB at approximately 1.8 … 2.0mm (see figure 7 and figure 8), which is the thickness of the square metal part at the bottom plate. This part is holding the pressure pipe. This mounting condition prevents possible shortcuts between the electrical connections (TO-8 housing is connected to GND). g) It has to be ensured, that pressure is only applied via the pressure pipe, since above a certain pressure, the metal cap will start to bend. This critical pressure level is slightly above the full scale pressure range. h) The sensor is sensitive to temperatures above 170°C, thus temperatures above this value at the TO8-cell (not at the pins) must be avoided. As a consequence: (1) Reflow soldering of the sensor is forbidden, since too high temperatures may occur. By using hand or dip soldering of the pins the temperature at the pins may exceed 170°C, but not in the inner part of the sensor. For checking the temperature of the housing, a thermo couple or temperature probe could be used. (2) The pressure of the measured media has to be applied via the pressure pipe. Thus this pressure pipe has to be connected to the device (e. g. an airconditioner) without leakage. This could be done by using an O-ring or laser welding or soldering. Depending on the pressure range some methods are not feasible (e. g. O-Ring for 30 bar applications). If laser welding or soldering is used, the same temperature restriction is valid as described in (1), but in this case the pressure pipe is introducing the temperature. (3) A dedicated assessment of the influence of the implementation method (ORing, soldering, welding, etc.) could be done together with Bosch Sensortec in order to ensure proper assembly and to avoid damage of the sensor. If the installation of the sensor takes place at the supplier e.g. of an assembly unit, the supplier has to be instructed accordingly. If the pressure sensor is removed after field use from the interface of an assembly unit e.g. rail, the sensor has to be replaced by a new sensor to guarantee tightness. Rev. 1.3 Page 10 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 4 Bosch Sensortec Maximum storage time Maximum storage time: Storage temperature: Relative humidity: 3 years 0 ... 40°C 40... 60% Short-term exceeding of storage conditions is possible (see maximum ratings). Protecting against external effect (i.e. precipitation, vapor) Rev. 1.3 Page 11 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 5 Bosch Sensortec Pin assignment A B C CLK = supply (+5 V) = ground (contacted to TO-8 can) = pressure output = temperature output, high impedance, can be connected to ground if not used UP1 = programming pin, can be connected to ground UP2 = programming pin, can be connected to ground Figure 6: Pin assignment – view from above Rev. 1.3 Page 12 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 6 Bosch Sensortec Package Figure 7: Package dimensions (all in mm), type writing is in the hatched area Figure 8: Pressure supply pipe with tolerance data (all in mm) Rev. 1.3 Page 13 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet BMD040 7 7.1 Bosch Sensortec Legal disclaimer Product use Bosch Sensortec products are developed for the consumer goods industry. They may only be used within the parameters of this product data sheet. Bosch Sensortec products are provided with the express understanding that there is no warranty of fitness for a particular purpose. They are not fit for use in life-sustaining, safety or security sensitive systems or any system or device that may lead to bodily harm or property damage if the system or device malfunctions. In addition, Bosch Sensortec products are not fit for use in products which interact with motor vehicle systems. The resale and/or use of products are at the purchaser’s own risk and his own responsibility. The examination of fitness for the intended use is the sole responsibility of the Purchaser. The purchaser shall indemnify Bosch Sensortec from all third party claims, including any claims for incidental, or consequential damages, arising from any product use not covered by the parameters of the respective valid product data sheet or not approved by Bosch Sensortec and reimburse Bosch Sensortec for all costs in connection with such claims. The purchaser must monitor the market for the purchased products, particularly with regard to product safety and inform Bosch Sensortec without delay of all security relevant incidents. 7.2 Engineering samples Engineering Samples are marked with an asterisk (*) or (e). Samples may vary from the valid technical specifications of the product series contained in this data sheet. They are therefore not intended or fit for resale to third parties or for use in end products. Their sole purpose is internal client testing. The testing of an engineering sample may in no way replace the testing of a product series. Bosch Sensortec assumes no liability for the use of engineering samples. By accepting the engineering samples, the Purchaser agrees to indemnify Bosch Sensortec from all claims arising from the use of engineering samples. 7.3 Application examples and hints With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Bosch Sensortec hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of noninfringement of intellectual property rights or copyrights of any third party. The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. They are provided for illustrative purposes only and no evaluation regarding infringement of intellectual property rights or copyrights or regarding functionality, performance or error has been made. Rev. 1.3 Page 14 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine Data sheet Bosch Sensortec BMD040 8 Document history and modification Rev. No Chapter 1.0 1.1 Title 1.6 1.2 3 7 1 1.3 1.3 Description of modification/changes Initial version Introduced part number Added some comments on tolerance values Modified and added assembly recommendations Update of legal disclaimer Added storage temp, increase temp.-range Added info on external 10nF capacitors Date 05-June-07 26-Oct-2007 26-Oct-2007 03-Dec-2007 03-Dec-2007 16-Jan-2008 23-Oct-2008 Bosch Sensortec GmbH Gerhard-Kindler-Strasse 8 72770 Reutlingen / Germany contact@bosch-sensortec.com www.bosch-sensortec.com Modifications reserved | Printed in Germany Specifications subject to change without notice Document-number: BST-BMD040-DS000-03 Version_1.3_102008 Rev. 1.3 Page 15 - proprietary information 23 October 2008 © Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany. Specification is subject to change without notice. Document contains proprietary information and is not intended for publication. Downloaded from DatasheetLib.com - datasheet search engine