SDI 2225 Q-MODULE HIGH END INERTIAL MEMS ACCELEROMETER Description：

Datasheet

The 2225 is a low-mass, low-power module, electrically and mechanically compatible with fixtures and equipment designed for industry-standard quartz accelerometers and intended for use in inertial and tilt applications requiring zero to medium frequency response excellent long-term bias and scale factor repeatability, and low noise. The Model 2225 module combines a high-temperature, open printed circuit board (PCB) specifically designed to give the high stability required for inertial applications and SDI’s Model 1525 Industrial & High-End Inertial MEMS DC Accelerometer.

The SDI Model 1525 MEMS DC accelerometer combines two patented capacitive silicon sense elements and a precision, custom CMOS integrated circuit in a hermetically sealed LCC package. The differential output voltage of the MEMS accelerometer is converted on the PCB into a current proportional to the applied acceleration. Thermal calibration parameters can be provided for the 2225 module to achieve high performance with user real-time temperature compensation and modeling software.

ZERO TO MEDIUM FREQUENCY APPLICATIONS

OPERATION

The model 2225 input axis is perpendicular to the PCB. The seismic center is located at the center of the PCB inside the LCC accelerometer, approximately 0.110 inches (2.75 mm) above the top of the PCB, the reference surface for the 2225.

The Model 2225 generates an output current, the value of which varies with acceleration as shown in the adjacent figure.

PERFORMANCE - ALL VERSIONS

SPECIFIED -55°C TO +85°C, Unless otherwise specified Vin = +/- 12 Volts, TC=25°C

Scale = measured value; FS = Full Scale = absolute output = 4000 mV

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