Triaxial accelerometer SDI 2420

MEMS

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.