Silicon Designs Model 2420 Triaxial Digital Accel Module, Pulse Density Output, +5 VDC Power, 9-Pin D-Subminiature Connector
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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] Sep 07 ORDERING INFORMATION Full Scale Acceleration Model Number ± 2 g 2420-002 ± 5 g 2420-005 ± 10 g 2420-010 ± 25 g 2420-025 ± 50 g 2420-050 ± 100 g 2420-100 ±200 g 2420-200 SILICON DESIGNS, INC Model 2420 TRIAXIAL DIGITAL ACCELEROMETER MODULE ! 3 Axis Acceleration Sensing ! Capacitive Micromachined ! Nitrogen Damped ! Use with model 3320 G-LOGGERTM or Interface to your Microprocessor ! Digital Pulse Density Outputs ! Fully Calibrated ! Low Power Consumption ! -55 to +125EC Operation ! +5 V DC Power ! Serialized for Traceability ! Good EMI Resistance ! Responds to DC & AC Acceleration ! TTL / CMOS Compatible ! Non Standard Ranges Available ! Rugged Anodized Aluminum Module ! D-Sub, 9-Pin (4 signal+2 Power) Connection DESCRIPTION The Model 2420 triaxial accelerometer module is meant to be used with the model 3320 G-LOGGERTM Acceleration Acquisition System. The 2420 contains three orthogonally mounted model 1010 accelerometers which feature a micromachined capacitive sense element, a custom integrated circuit sense amplifier and sigma-delta A/D converter. It provides a TTL/CMOS compatible output signal for measuring accelerations in commercial/industrial environments and is tailored for zero to medium frequency instrumentation applications. The anodized aluminum case is epoxy sealed and is easily mounted via two #8 (or M4) screws. It is relatively insensitive to temperature changes and gradients. An optional calibration sheet (2420-CAL) and periodic calibration checking are also available. OPERATION The Model 2420 produces three digital pulse train outputs in which the density of pulses (number of pulses per second) is proportional to applied acceleration. It operates from a single +5 volt power supply and a 100kHz to 1MHz, TTL/CMOS compatible, clock. Each of the three outputs are ratiometric to the clock frequency and independent of the power supply voltage. The "Z" axis is perpendicular to the bottom of the package, with positive acceleration defined as a force pushing on the bottom of the package. The "X" and "Y" axis directions are marked on the cover with positive acceleration defined as acceleration in the direction of the axis arrow. External digital line drivers can be used to drive long cables or when used in an electrically noisy environment. SIGNALS +5V: (pin 5) DC Power . . . . . . . . . . . . . . (reddish brown wire) GND: (pins 6-9) Ground . . . . . . . . . . . . . . . . . . . . . . . . (black wire) CLK: (pin 1) Input reference clock; 100Khz-1MHz . (white wire) CNTX: (pin 2) X-Axis count output . . . . . . . . . . . . . . (green wire) CNTY: (pin 4) Y-Axis count output . . . . . . . . . . (light brown wire) CNTZ: (pin 3) Z-Axis count output . . . . . . . . . . . . (light blue wire)

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 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 2] Sep 07 Model 2420 Triaxial Digital Accelerometer Module ABSOLUTE MAXIMUM RATINGS * Operating Temperature (Case & Cable) . . . -55 to +125EC Operating Temperature (Connector) . . . . . -55 to +105EC Storage Temperature . . . . . . . . . . . . . . . . . -55 to +105EC Acceleration Over-range . . . . . . . . . . . . . 2000g for 0.1 ms Voltage on VDD to GND . . . . . . . . . . . . . . . . . -0.5V...

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 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 3] Sep 07 Where: ) 1 g full scale acceleration in g' s sample rate in Hertz accelerometer clock rate in Hertz pulse rate in pulses / sec acceleration in gravity units 9.807 m / s 2 or 32.175ft / s 2 g f f f g SPAN SR CLK CNT FORCE = = = = = = 2 *( CNT CNT Quantization (g' s) = = + = - g • f f f f g g g g f f SPAN SR CLK CNT CLK FORCE SPAN FORCE SPAN CNT CLK 1 2 1 2 Model 2420 Triaxial Digital...

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 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 4] Sep 07 Model 2420 Triaxial Digital Accelerometer Module SENSOR LOCATIONS