SDI 2012 & 2422 SPECIALTY +5V ACCELEROMETERS Description：

Datasheet

SDI's 1-axis Model 2012 and 3-axis Model 2422 MEMS DC Test & Measurement Accelerometer Modules are designed for applications in which the power supply may be limited, or where only a steady +5V DC excitation may be available.

The 2012 and 2422 feature an integrated 3’ cable, and both models feature one (1) or three (3) hermetically sealed, low noise SDI surface mount accelerometers, which are individually tested, programmed, and calibrated by SDI.

The 2012 and 2422 are relatively insensitive to temperature changes and gradients between -55 and +125°C. The cable’s shield is electrically connected to the case while the ground (GND) wire is isolated from the case. The robust, anodized aluminum case is epoxy sealed and can be mounted easily via two screws, an adhesive, or by attaching a magnet.

ZERO TO MEDIUM FREQUENCY APPLICATIONS

OPERATION

SDI Models 2012 and 2422 MEMS DC Accelerometers provide optimal performance when they are connected to instrumentation in a differential configuration using both the AOP and AON output signals, but they also support single ended operation for complete flexibility.

These Accelerometers produce differential analog output voltage pairs (AON & AOP) which vary with acceleration. The signal outputs are fully differential about a common mode voltage of approximately 2.5 volts. At zero acceleration, the output differential voltage is nominally 0 volts DC; at ±full scale acceleration, the output is ±4 volts DC, respectively, as shown in the figure (below). The output scale factor is independent from the supply voltage of +5 volts.

When a differential connection is not possible, SDI recommends connecting the accelerometer to instrumentation in single ended mode by connecting AOP and GND to the instrumentation and leaving AON disconnected. Keep in mind that the signal to noise ratio is reduced by half for a single-ended vs. a differential connection.

PERFORMANCE - ALL VERSIONS

All Models: Unless otherwise specified, Vs=+8 to +32 VDC, TC=25°C, Differential Mode. Span = ±g range = 8000 mV.

Note (1): For 2g thru 50g only; 100g and greater versions are tested and specified from -65 to +65g.

NOTICE: Stresses greater than those listed may cause permanent damage to the device. These are maximum stress ratings only. Functional operation of the device at or above these conditions is not implied.

PACKAGE DIMENSIONS