BMD040

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Technical content

Rev. 1.3 Page 1 - 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. 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 Specification subject to change without notice. Proprietary information, not intended for publication. Product phot os and pictures are for illustration purposes only and may differ from the real product’s appearance. BMD040 Analog pressure sensor Data sheet Downloaded from DatasheetLib.com - datasheet search engine

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. 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 sens or 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 fo rmed by an evacuated TO-type housing. The medium to be measured is led up by a pressure nozzl e to the back side of the diaphragm, which is resistant to most of the measured media. Downloaded from DatasheetLib.com - datasheet search engine

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. Table of contents 1.1 M Downloaded from DatasheetLib.com - datasheet search engine

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.

1 Data

(valid for BMD040 only, not for module)

1.1 Maximum ratings of pressure sensor

Parameter Condition Value Unit Max. time Supply Voltage U S,max. 16 V 1 min Pressure (burst pressure) p abs,max. 9000 kPa 1 min Proven pressure P_prov 4500 kPa 1 min. Temperature t -40/+130 °C 100 h Storage Temperature T -3 0/+120 °C < 6 weeks 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 Unit min. typ. max. Pressure range p abs 50 3000 kPa Temperature range t -30 100 °C Supply voltage U S 4.75 5.0 5.25 V Supply current at US = 5 V l S 6.0 9.0 12.5 mA Output load current l L -1.0 0.5 mA Load resistance to US or to ground Rpull-up Rpull-down 5.0 10.0 k Ω kΩ Load capacitance CL 12 nF Response time T 10/90 1.0 ms Lower limit at US = 5 V U out,min. 0.25 0.3 0.35 V Upper limit at US = 5 V U out,max. 4.65 4.7 4.75 V Output resistance to ground, US open 1) Rlo 2.4 4.7 8.2 k Ω Output resistance to US, ground open 1) Rhi 3.4 5.3 8.2 k Ω 1) valid only for measuring voltage < 0.5V Downloaded from DatasheetLib.com - datasheet search engine

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.

1.3 Signal evaluation

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 > 2M Ω, e.g. buffer with subsequent filtering) is decreasing with increasing temperature. (including the 10nF mentioned before).

1.4 Signal range check

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. Figure 1. Application note (example)

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.

1.5 Transfer function of pressure sensor

Figure 2. Characteristics at US = 5.000 V (schematic view)

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.

1.6 Accuracy of pressure sensor

Figure 3. Characteristic tolerance (2s values) Figure 4. Tolerance broadening as a function of temperature (schematic view)

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.

1.7 Data of CLK PIN

• U CLK 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

1.8 Typical temperature dependence of CLK-PIN (schematic)

Figure 5. Characteristic U CLK = 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 temperature UCLK Downloaded from DatasheetLib.com - datasheet search engine

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.

2 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. Downloaded from DatasheetLib.com - datasheet search engine

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.

3 Assembly installation

In order to avoid deterioration or pre-damage of t he 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 av oid 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 t he 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 temp eratures 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 air- conditioner) 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 (O- Ring, 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. Downloaded from DatasheetLib.com - datasheet search engine

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.

4 Maximum storage time

Maximum storage time: 3 years Storage temperature: 0 ... 40°C Relative humidity: 40... 60% Short-term exceeding of storage conditions is possible (see maximum ratings). Protecting against external effect (i.e. precipitation, vapor) Downloaded from DatasheetLib.com - datasheet search engine

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.

5 Pin assignment

A = supply (+5 V) B = ground (contacted to TO-8 can) C = pressure output CLK = 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 Downloaded from DatasheetLib.com - datasheet search engine

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.

6 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) Downloaded from DatasheetLib.com - datasheet search engine

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.

7 Legal d isclaimer

7.1 Product use

Bosch Sensortec products are developed for t he 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 se curity 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 non- infringement 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. Downloaded from DatasheetLib.com - datasheet search engine

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.

8 Document history and modification

Rev. No Chapter Description of modification/changes Date

1.0 Initial version 05-June-07

1.1 Title Introduced part number 26-Oct-2007

1.6 Added some comments on tolerance values 26-Oct-2007

1.2 3 Modified and added assembly recommendations 03-Dec-2007

7 Update of legal disclaimer 03-Dec-2007

1 Added storage temp, increase temp.-range 16-Jan-2008 1.3 1.3 Added info on external 10nF capacitors 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 Downloaded from DatasheetLib.com - datasheet search engine