MS767_08

MS767 PRESSURE SENSOR DIE (0-7 BAR) • 0 to 700 kPa range (7 bar or 102 PSI) • Absolute pressure sensors • RoHS-compatible & Pb-free1 DESCRIPTION The sensor element of the MS767 consists of a silicon micro-machined membrane with a Pyrex glass mounted under vacuum. Implanted resistors make use of the piezo-resistive effect. The MS767 is available as an absolute sensor (MS767A) where a sealed vacuum cavity underneath the membrane is used as reference pressure. FEATURES • • • Uncompensated pressure sensor die Output Span 392mV @ 5V Temperature Range -40° …+125° C • • • Linearity 0.15% (typical) Die Size 1.72 x 1.58mm Low Cost, High reliability APPLICATION • • • For absolute pressure sensor systems Tire pressure measurements Electronic scales ELECTRICAL CONNECTIONS Positive output for pressure applied topside Vs+ EPI Vs+ : Supply voltage of Wheatstone bridge Epi : Connection of epitaxial layer (membrane) Out+ Out- : Negative output OutOut+ : Positive output GND1 : Ground GND2 : Ground GND1 GND2 1 The European RoHS directive 2002/95/EC (Restriction of the use of certain Hazardous Substances in electrical and electronic equipment) bans the use of lead, mercury, cadmium, hexavalent chromium and polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE). DA767_008.doc 00000767356 ECN 1043 February 5th, 2008 1/4 PAD OUT Vs+ Epi OutImportant remarks: As the sensing elements are diffused resistances, the voltage applied on the ground pads (GND1 and GND2) has to be lower than the voltage applied on supply voltage pad (Vs+). The epitaxial layer is connected to the Vs+ pin on the die Out+ MS767 GND1 GND2 LAYOUT DA767_008.doc 00000767356 ECN 1043 February 5th, 2008 2/4 FULL SCALE PRESSURE kPa 700 bar 7 mbar 7000 PSI 102 atm 6.9 mm Hg 5250 m H2O 71 Inches H2O 2810 ABSOLUTE MAXIMUM RATINGS Parameter Supply voltage Storage temperature Pressure overload Symbol VS+ TS Ta = 25 oC -40 Conditions Min Max 20 +150 21 Unit V C Bar o ELECTRICAL CHARACTERISTICS (Reference conditions: Supply Voltage VS+ = 5 Vdc; Ambient Temperature Ta = 25° ) C Parameter Operating Pressure Range Operating Temperature Range Bridge Resistance Full-scale span (FS) Zero Pressure Offset Linearity Temperature Coefficient of Resistance Span Offset Pressure Hysteresis Repeatability Temperature Hysteresis NOTES Min 0 -40 3.0 322 -40 Typ Max 7 125 Unit Bar ° C kΩ mV mV % FS ppm/° C ppm/° C µV/° C % FS % FS % FS 3 4 5 1 2 Notes 3.4 392 0 ± 0.15 3.8 462 40 ± 0.4 + 3300 - 2300 + 80 ± 0.15 ± 0.2 0.3 + 2400 - 1500 - 80 + 2800 - 1900 ± 0.05 ± 0.1 1) Deviation at one half full-scale pressure from the least squares best line fit over pressure range (0 to 7 bar). 2) Slope of the endpoint straight line from 25° to 60° C C. 3) Output deviation at any pressure within the specified range, when this pressure is cycled to and from the minimum or maximum rated pressure, at 25° C. 4) Same as 3) after 10 pressure cycles 5) Maximum difference in offset after one thermal cycle from -40° to +125° C C. DA767_008.doc 00000767356 ECN 1043 February 5th, 2008 3/4 PICKING TOOLS The MS767 sensors have a sensitive membrane (0.5 x 0.5 mm) the sensor dice outer diameter is: 1.62 x 1.48 mm. The pick and place tool has to be of a soft material as rubber (Hardness 78-97 Shore A). Its external size must fit the sensor and the vacuum cavity must be as large as the membrane itself. Successful test where done with some tools of SPT (see SPT drawing and references bellow). SPT references External dimension Internal dimensions RTR-A1-060x060 TL & TW: 0.06 inch /1.52 mm ∅H: 0.035 inch / 0.89 mm ORDERING INFORMATION Product Code MS767A-0.5 MS767A-0.2 Product 700 kPa Absolute Pressure Sensor with Pyrex™ 0.5 mm thick (standard) 700 kPa Absolute Pressure Sensor with Pyrex™ 0.2 mm thick Art.-Nr. 76710025 76710022 The MS767 dice are supplied sawn on blue foil, mounted on plastic rings FACTORY CONTACTS Intersema Sensoric SA Ch. Chapons-des-Prés 11 CH-2022 BEVAIX SWITZERLAND Tel. 032 847 9550 Tel. Int. +41 32 847 9550 Telefax +41 32 847 9569 e-mail: http://www.intersema.ch NOTICE Intersema reserves the right to make changes to the products contained in this data sheet in order to improve the design or performance and to supply the best possible products. Intersema assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Intersema makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. DA767_008.doc 00000767356 ECN 1043 February 5th, 2008 4/4