Description

The 7022 accelerometer module has one, two or three orthogonal analog capacitive accelerometers with high drive, low impedance, buffering for measuring in harsh environments. It is tailored for zero to medium frequency instrumentation applications for the measurements of vibration or orientation (tilt). Each of the internal accelerometers contains a miniature, hermetically sealed micromachined capacitive sense element and a custom integrated circuit sense amplifier. On-board voltage regulation and an internal voltage reference eliminate the need for precision power supplies. In addition, the 7022 includes an amplifier on each axis to produce high-level outputs. The 7022 is insensitive to temperature changes and its frequency response includes DC.
 

Operation

The 7022 accelerometer module produces three analog voltage outputs that vary with acceleration and orientation. The “Z” axis is perpendicular to the bottom of the package, with positive acceleration defined as a vibration 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. The outputs are single ended and vary with respect to the voltage at the OUTPUT REF input which should be approximately centered between the +Vs and -Vs supply voltages. The output scale factor is independent of the supply voltages from ±12 to ±18 volts. At zero acceleration the output differential voltage is nominally zero volts; at ±full-scale acceleration the output voltage is ±5 volts respectively.
 

Applications

• Missile Guidance
• Vibration Monitoring
• Tilt Sensor
• Modal Analysis
• Robotics
• Crash testing
• Instrumentation

Signal Descriptions

+Vs (Power): Red wire. Apply +12 to +18 Volts DC with respect to OUTPUT REF.
-Vs (Power): Black wire. Apply -12 to -18Volts DC with respect to OUTPUT REF.
OUTPUT REF (Input): White wire. The X, Y and Z outputs are referenced to this potential. This input is tied to a potential halfway between the +Vs and -Vs voltages.
X, Y and Z (Outputs): Green, orange and blue wires respectively. These analog output voltages are proportional to acceleration: they increase with positive acceleration and decrease with negative acceleration. At zero acceleration the output is nominally equal to zero volts with respect to OUTPUT REF.
 

Performance by Acceleration Level: Vs = ±12 to ±18 VDC; Tc = 25º C

Performance: Vs = ±12 to ±18 VDC; Tc = 25º C unless otherwise specified

* The power source must be capable of providing at least 3 times the operating current at turn-on.
 

Datasheet in PDF