SQ-SVS MEMS Vibration Sensor
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SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs TRANSFER FUNCTION AveragePower ( mgRMS ) = Output ( V ) − Offset ( V ) Sensitivity (V / mgRMS ) DESCRIPTION The vibration sensor module performs calibrated averaging (root mean squared) vibration measurement with analog voltage and digital serial outputs. Because acceleration signals are extremely fast by nature, they require high speed sampling and computationally intensive processing to measure. The onboard RMS computation provides a slow moving output that can be easily measured by a low speed system to monitor the average vibration level, greatly simplifying vibration monitoring and measurement. RANGE AND SCALE VIB1 Output PARAMETER Scale Factor Offset (0 mgRMS value) Max (1175 mgRMS value ) FUNCTION 0.005 - 2 g dual axis vibration measurement FEATURES 15 % accuracy 0.005 g resolution 2 g dual axis vibration range 1 Hz - 500 Hz bandwidth, 1 second averaging period Programmable alarm outputs Low temperature drift Factory calibrated average vibration output High reliability solid-state MEMS Digital filtration for stable measurement Direct PC interface cable PARAMETER Scale Factor Offset (0 mgRMS value) Max (2350 mgRMS value ) Thresholds PARAMETER UNITS VALUE Threshold 1 mgRMS 25 Threshold 2 mgRMS 250 * Thresholds can be customized at the factory to suit the application APPLICATIONS Motor vibration measurement and monitoring Vibration alarm triggering Fan motors, vehicle motors, machine motors THEORY OF OPERATION The vibration sensor uses 2 factory calibrated accelerometers to measure and compute combined RMS acceleration. The calibration and RMS calculations are made by an onboard processor. Additional processing filters spurious acceleration and vibrations to reduce the impact on the resulting output angle. Updated: 2008-06-04 10 Water St. Lebanon, NH 03766 USA Page 1 of 10 www.signalquest.com info@signalquest.com

SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs 10 Water St. Lebanon, NH 03766 USA Page 2 of 10 www.signalquest.com info@signalquest.com

SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs ABSOLUTE MAXIMUM RATINGS PARAMETER Voltage on +Vcc - without regulator - NR option Voltage on +Vcc - with regulator - R option Voltage on any input pin Peak-to-peak supply noise - without regulator -NR option Peak-to-peak supply noise - with regulator - R option Operating temperature Shock survivability Operating vibration NOTES with respect to GND with respect to GND where 1 g is assumed to be = 9.81 m/s2 models available up to 70 g Note: Exposure to conditions outside of...

SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs PERFORMANCE PARAMETERS PARAMETER Analog Range Vib1 Analog Range Vib2 Analog Scale Factor Vib1 Analog Scale Factor Vib2 Analog Offset value Max Output Vib1 Max Output Vib2 Effective sampling resolution Acceleration accuracy 0 – 1175 mgRMS 0 – 2350 mgRMS 0.00253 V/ mgRMS 0.00127 V/ mgRMS 0.147 V 3.121 V 3.121 V 12+ bits +/- 15% 1000 mg = 1 g, 1 g = 9.8 m/s2 0 mgRMS 1175 mgRMS 2350 mgRMS High accuracy models also available OUTPUT CHARACTERISTICS PARAMETER Analog output...

SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs SIGNAL NAME UART Transmit UART Receive Baud Select Digital Output – UART transmit line. Push-pull (not open collector). If not used, solder to open circuit for mechanical stability. Do not connect to GND or current drain will increase. Digital Input – UART receive line. If not used, solder to V+. Digital Input – High (or open) selects high baud rate, Low selects low baud rate. If not used, solder to V+. Analog Output – At power-up this signal bounces high until internal...

^----Precision Microsensors 0.005 - 2 g RMS vibration, analog, serial and trigger outputs Uertical Mount Package <UMP) Horizontal Mount Package CHMP) Side Uieu Side Uieu TT , J. 9AA0 ri4 © SignalQuest, Inc. 10 Water St. Tel: 603.448.6266 www.signalquest.com

SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs Since the device is a subassembly of surface mount components, it is not suitable for automatic assembly or wave soldering. Hand soldering of pins or SMT pads is specified for 3 seconds at 218 ºC. Pins labeled NC (no connect) should be soldered to open connection pads / pins for mechanical stability. The designer should test the device’s output voltage through its entire desired angle range during prototyping to ensure that it is working properly in the application. The...

SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs SERIAL PACKET FORMAT Vib 1 (high byte) Vib 1 (low byte) X Accel (high byte) Y Accel (high byte) Checksum (high) Output_Value = Measured_Vibration(mgRMS) × 10. For example, a measured vibration of 1275 mgRMS results in an output value of 1275. Format: 16-bit, unsigned integer. Output_Value = Measured_Acceleration (g) *1000. For example, a measured acceleration of 1.275 g results in an output value of 1275. Format: 16-bit, unsigned integer sum of the 16 bit unsigned integer...

SQ-SVS SOLID STATE VIBRATION SENSOR WITH RMS AVERAGING 0.005 - 2 g RMS vibration, analog, serial and trigger outputs ORDERING GUIDE Preconfigured model 1 – 500 Hz bandwidth. See Preconfigured Model Comparison above for more details. Model 2 10 – 100 Hz bandwidth. See Preconfigured Model Comparison above for more details. Power regulator option Pin package option Trigger options RoHS (lead free) Special order only Special order only Standard version (stock) Horizontal mount package Fits into standard 0.100” grid circuit board Vertical mount package Available for SQ-SI family only Fits inside...