overview the SMD288 belongs to a family of various micro-machined pressure sensors. the main a pplication for this device is the barometric air pressure measurement in diesel or gasoline engine management control units. furthermore the SMD288 can be utilized for height measurements e.g. in navigation devices. product description the barometric pressure sensor SMD288 is designed for a standard pressure range of 40 kpa?115 kpa. custom specific ranges are available upon request. in order to offer a cost compet itive product, the SMD288 is manufactured with the bosch apsm (advanced porous silicon membrane) process. th e apsm technology allows to produce a stable single-crystalline membrane with a cmos compatible surface micro-mechanic process. the evaluation circuit which is integrated on the same chip as the micro-mechanical sensing element provides a calibrated and temperature co mpensated output with high accuracy. additionally it comprises an open circuit detection capability. the sensor is protected against short circuit to v cc , gnd and v bat = 16 v and against inverse polarity up to supply currents of 300 ma (for 5 min at room temperature). furthermore the sensor is protected against esd (human body model: up to 2 kv, machine model: up to 250 v, charged device model: up to 500 v/750 v for corner pins). the sensor is rohs compliant and qualified according to aec-q100. customer benefit / features: ? ? ? ? ? ? ? ? ? ? ? ? ? pressure range: 40 kpa?115 kpa custom specific ranges upon request broad temperature range -40c?+125c on-chip calibration and temperature compensation ratiometric analog output fast analog technology surface mount package stable single-crystalline membrane (apsm process) esd-protection short circuit protected inverse polarity protecte d up to 300 ma supply current open circuit detection capability lead-free solder ing capability automotive electronics barometric pressure sensor for engine management systems SMD288 barometric pressure sensor SMD288 free datasheet http://www.datasheetlist.com/
automotive electronics | SMD288 parameters SMD288 measurement and functional characteristics minimum rated pressure 40 kpa maximum rated pressure 115 kpa output analog sensitivity 45 mv/kpa (@ v dd = 5 v) tolerance 1.5 kpa (0 c...+85 c/2.25 kpa operating conditions operating temperature -40 c?+125 c supply voltage 5.0 v supply current (v cc =5.00 v) < 12.0 ma outline pm8 package dimensions in millimeters working principle the measurement principle is ba sed on four piezo-resistors located on a membrane which are connected to a wheatstone bridge. beneath the membrane a thin cavity encloses vacuum. the applied ba rometric pressure leads to a deflection of the membrane which causes a change in the resistors? value. the resulting signal is amplified and temperature compensated by an electronic circuit which is integrated on the same chip with the sensor element. interface the SMD288 supplies an analog output signal which varies linearly with the applied pressure and is ratiometric to the supply voltage. package the sensor is packaged in a premold housing with a so8 footprint. it is easy to equip in standard assembly lines. portfolio the SMD288 sensor is part of a larger sensor portfolio. this portfolio consists of accelera tion sensors, angular rate sensors, pressure sensors, torque sensors, and co 2 sensors for occupant safety systems, vehicle dynamics control vdc, active susp ension systems, motor management, steering systems, and a/c systems. bosch has been active in the field of micromechanics (mems) for more than 20 year s, and is established as one of the pioneers of this te chnology. with more than 900 mems patents, hundreds of engineers in this field, and more than 1.6 billion mems sensors shipped to date, bosch is the global market leader for mems sensors. for more information about automotive mems sensors, visit www.bosch-sensors.com . regional sales contacts europe/japan bosch.semiconductors@de.bosch.com usa/canada bosch.semiconductors@us.bosch.com china bosch.semiconductors@cn.bosch.com korea bosch.semiconductors@kr.bosch.com www.bosch-semiconductors.com www.bosch-sensors.com robert bosch gmbh ae/mkt-s postfach 13 42 72703 reutlingen germany www.bosch.de ? robert bosch gmbh 04/2011. all rights reserved, also regarding any di sposal, exploitation, reproduction, editing, distribution, as well as in the event o f applications for industrial property rights. the information provided is for information purposes only and does not constitute a legal oblig ation or a warranty, express or implied, concerning quality, marketability or suitab ility for a specific purpose. the designs incorporated in vehicles and the performan ce of the designs may vary depending on the vehicle manufacturer's specifications and requirements for the product. we reserve the right to make product changes, adapt ations and modifications without prior notice. free datasheet http://www.datasheetlist.com/
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