Single axis accelerometer
2 - 200 g | SDI 2240
Silicon Designs
The model 2240 accelerometer is a hermetically sealed version of the model 2220. This rugged module combines
an integrated model 1221L accelerometer with high drive, low impedance buffering for measuring acceleration in
commercial/industrial environments. It is tailored for zero to medium frequency instrumentation applications. The
titanium case is sealed using a laser welding process and is easily mounted via two #4 (or M3) screws. On-board
regulation is provided to minimize the effects of supply voltage variation. It is relatively insensitive to temperature
changes and gradients. A model 2240-CAB cable, sold separately (see order information above), connects via a
miniature 4-pin screw-on connector. The cable’s shield is electrically connected to the titanium case while the ground
(GND) wire is isolated from the case. An initial calibration sheet (2240-CAL) is included and periodic calibration
checking is available.
OPERATION
The Model 2240 accelerometer module 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 defined as a force pushing on the bottom of the package. The signal outputs are fully differential about
a common mode voltage of approximately 2.5 volts. The output scale factor is independent from the supply voltage
of +9 to +32 volts. At zero acceleration the output differential voltage is nominally 0 volts DC; at ±full scale
acceleration the output differential voltage is ±4 volts DC respectively.
