Silicon Designs, Inc.

Model 2422

Triaxial Analog Accelerometer Module

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FEATURES
  • 3 Axis Acceleration Sensing
  • Capacitive Based Nitrogen Damped Sensors
  • ± 4V differential or +4 V Single Ended Outputs
  • Low Power Consumption
  • -55 to +125 °C Operation
  • +5 V DC Power
  • 8 Wire Connection
  • Responds to DC & AC Acceleration
  • Hermetic Capacitive Sensors
  • Non Standard G Ranges Available
  • Rugged Anodized Aluminum Case
  • No External Reference Voltage Required
DESCRIPTION

The Model 2422 triaxial accelerometer module combines three orthogonally mounted Model 1210 integrated accelerometers in an anodized aluminum case for measuring accelerations in commercial/industrial environments. It is tailored for zero to medium frequency instrumentation applications. Each of the three internal accelerometers contains a miniature, hermetically sealed, micromachined capacitive sense element and a custom integrated circuit sense amplifier. It is relatively insensitive to temperature changes and gradients and its frequency response includes DC. 
Ordering Information

Full Scale 
Acceleration

Model 
Number

±5 G

2422-005

±10 G 2422-010
±25 G 2422-025
±50 G 2422-050
±100 G 2422-100
±200 G 2422-200

OPERATION

The Model 2422 produces three differential analog output voltage pairs (AON & AOP) which vary with acceleration as shown in the figure below. The outputs can be used in differential mode or single ended, referenced to halfway between VDD and GND. The output scale factor is ratiometric to the applied VDD voltage and both AON & AOP, at zero acceleration, are equal to halfway between VDD and GND. The "Z" axis is perpendicular to the bottom of the package, with positive acceleration defined as a force pushing 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.
 
 

SIGNALS
  • +5V: (Power) reddish brown wire
  • GND: (Ground) black wire
  • AOPX: (Output) green wire X-Axis positive analog output.
  • AONX: (Output) white wire X-Axis negative analog output.
  • AOPY: (Output) light brown wire Y-Axis positive analog output.
  • AONY: (Output) orange wire Y-Axis negative analog output.
  • AOPZ: (Output) light blue wire Z-Axis positive analog output.
  • AONZ: (Output) yellow wire Z-Axis negative analog output.

 

ABSOLUTE MAXIMUM RATINGS *

Case Operating Temperature ..................... -55 to +125°C
Storage Temperature ..................................-55 to +125°C
Acceleration Over-range .........................2000g for 0.1 ms
Voltage on VDD to GND ............................-0.5V to 6.5V
Voltage on Any Pin to GND 1............-0.5V to VDD+0.5V
Power Dissipation ...............................................250 mW

* NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at or above these conditions is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
 

PERFORMANCE - By Model: VDD= 5.0 VDC, TC=25 °C
Model Number 2422-005 2422-010 2422-025 2422-050 2422-100 2422-200 Units
Input Range ± 5 ±10 ±25 ±50 ±100 ±200 G
Frequency Response (Nominal, 3dB) 0 - 400 0 - 600 0 - 1000 0 -1600 0 - 2000 0 - 2500 Hz
Sensitivity (Differential)2 800 400 160 80 40 20 mV/G
Max. Mechanical Shock (0.1 ms)

2000

 G

 

PERFORMANCE - All Models: Unless Otherwise specified, VDD= 5.0 VDC, TC=25 °C, differential mode. 
Parameter Min Typ Max Units
Cross Axis Sensitivity   2 3 %
Bias Calibration Error3   1 2 4 % of span
Bias Temperature Shift (TC= -55 to 125°C)3   50 200 4 (ppm of span)/°C
Scale Factor Calibration Error 3,5   1 2 %
Scale Factor Temperature Shift (TC= -55 to 125°C)3   +300   ppm/°C
Output Noise (0 - 1.0 kHz)   800   µV (RMS)
Non-Linearity (-90% to +90% of Full Scale)3,5   0.5 1.0 4 % of Span
Power Supply Rejection Ratio   25   dB
Output Impedance   90   Ohms
Operating Voltage 4.75 5.0 5.25 V
Operating Current 3   18 25 mA
Mass (not including cable)   21   grams
Cable Mass   18   grams/met
Notes: 
  1. Voltages on AOP and AON signal wires may exceed 0.5 volt above or below the supply voltage provided the current into or out of the wire is limited to 1 mA.
  2. Single ended sensitivity is half of the Differential values shown.
  3. Tighter tolerances available on special order.
  4. These maximums do not apply to 5g version; contact factory for current 5g specifications.
  5. 100g versions and above are tested from -65 to +65 g.

ESD CONSIDERATIONS: The Model 2422 accelerometer is a CMOS device subject to damage by large electrostatic discharges. Diode protection is provided on the outputs but care should be exercised during handling of the cable wire ends. Individuals and tools should be properly grounded before coming in contact with the cable wire ends.

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE