Silicon Designs Model 2264 Analog Accelerometer, ±500 mV Differential or 250 mV Single Ended Output, +6 to +22 VDC - Silicon Designs - #1

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ORDERING INFORMATION Full Scale Acceleration Model Number ± 5 g 2264-005 ± 10 g 2264-010 ± 25 g 2264-025 ± 50 g 2264-050 ±100 g 2264-100 ±200 g 2264-200 SILICON DESIGNS, INC P-CapTM Model 2264 ANALOG ACCELEROMETER MODULE ! Accurate, Easy-to-Use Alternative to Piezoresistive Accelerometers ! Sensitivity Insensitive to Variations in Excitation Voltage, Temperature and Cable Resistance ! Frequency Response Insensitive to Temperature ! 6 to 22V Excitation (dual or single supply) ! Differential Output Signal / EMI Resistant ! Capacitive Micromachined ! Nitrogen Damped to 0.7 (nominal) ! Sensitivity Accurate to 2% (typical) ! -40 to +85EC Operation ! Traditional Four Wire Connection ! Responds to DC and AC Accelerations ! Rugged Anodized Aluminum Module & PTFE Cable ! Serialized for Traceability ! Non-Standard g Ranges Available ! Other Output Sensitivities Available DESCRIPTION The P-CapTM model 2264 accelerometer is a high performance and wide temperature range accelerometer intended to directly replace piezoresistive units for existing and new applications. It uses a capacitive sensing element and an advanced ASIC to simulate the operation of a piezoresistive bridge. It is tailored for zero to medium frequency instrumentation applications. The anodized aluminum case is epoxy sealed and is easily mounted via two #4 (or M3) screws. Internal regulation is provided to eliminate the effects of excitation voltage variation. Unlike piezoresistive elements, its sensitivity, bias and frequency response are insensitive to temperature changes or thermal gradients. The cable’s shield is electrically connected to the case while the ground (GND) wire is isolated from the case. An optional initial calibration sheet (2264-CAL) and periodic calibration checking are also available. OPERATION The P-CapTM model 2264 can be operated from supply voltages ranging from ±3 to ±11 VDC. It produces two analog voltage outputs which vary with acceleration as shown in the graph on the next page. The sensitive axis is perpendicular to the bottom of the package, with positive acceleration resulting from a force pushing on the bottom of the package. The signal outputs are fully differential about a common mode voltage that is midway between the two supply voltages which is 0 volts when equal plus and minus supplies are used. The output sensitivity or scale factor is independent of changes in the excitation voltage. At zero acceleration, the output differential voltage is nominally 0 volts DC; at ±full scale acceleration the output differential voltage is ±0.5 volts DC respectively. Single supply operation is also possible by connecting -Exc to ground and +Exc to +6 to +22 VDC but the average value of the +OUT and -OUT signals will be at ½ the supply voltage and each output will swing from ±0.25 volts around the ½ supply voltage level. Standard cable length is 1 meter. APPLICATIONS ! CRASH TESTING ! MODAL ANALYSIS ! VIBRATION MONITORING ! ROBOTICS ! VIBRATION ANALYSIS ! FLIGHT TESTING ! MACHINE CONTROL ! MACHINERY INSTRUMENTATION P-Cap is a trademark of Silicon Designs, Inc. Silicon Designs, Inc. ! 1445-NW Mall Street, Issaquah, WA 98027-5344 ! Phone: 425-391-8329 ! Fax: 425-391-0446 web site: www.silicondesigns.com [page 1] Apr 07