Silicon Designs, Inc.

Model 2012
ANALOG ACCELEROMETER MODULE

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FEATURES

• SENSOR:

  Hermetic Capacitive
  Micromachined
  Nitrogen Damped

• ± 4V Differential Output or 
        0.5V to 4.5V Single Ended Output
• Low Power Consumption
 • -55 to +125°C Operation
 • +5VDC Power
 • Four Wire Connection
 • Responds to DC & AC Acceleration
 • Non Standard G Ranges Available
 • Rugged Anodized Aluminum Module
 • No External Reference Voltage

DESCRIPTION

The Model 2012 accelerometer module is a low-cost single axis accelerometer for measuring accelerations in commercial/industrial environments. It is tailored for zero to medium frequency instrumentation applications. The module contains a miniature, hermetically sealed micromachined capacitive sense element, a custom integrated circuit sense amplifier, and differential output stages. It is relatively insensitive to temperature changes and gradients and the case is easily mounted via two #4 screws. The cable shield is electrically connected to the anodized aluminum package. For applications that require a lower output impedance or greater power supply rejection ratio than the Model 2012 provides, please refer to the Model 2210 data sheet.
ORDERING INFORMATION
Full Scale
Acceleration		 Model
Number

 ±5 g

2012-005
±10 g 2012-010
±25 g 2012-025
±50 g 2012-050
±100 g 2012-100

±200 g

2012-200

OPERATION

The Model 2012 accelerometer module produces two analog voltage outputs, AOP & AON, which vary with acceleration as shown. The signal outputs are fully differential about a common mode voltage of 1/2 VDD (approximately 2.5 volts). At zero acceleration, the output differential voltage is nominally zero volts; at ±full scale acceleration, the output differential voltage is ±4 volts respectively. The sensitive axis is perpendicular to the bottom of the package, with positive acceleration defined as a force pushing on the bottom of the package.

Output Voltage

SIGNAL DESCRIPTIONS

VDD and GND (Power): Red and Black wires respectively. Power (+5 Volts DC) and ground. Red and Black wires respectively. Power (+5 Volts DC) and ground.

AOP and AON (Output): Green and White wires respectively. Analog output voltages proportional to acceleration. AOP voltage increases with positive acceleration; AON voltage decreases with positive acceleration. At zero acceleration both outputs are nominally equal 2.5 volts. The device experiences positive (+1g) acceleration with its lid facing up in the Earth's gravitational field. Either output can be used individually or the two outputs can be used differentially. (See output response plot above)

   APPLICATIONS
    • VIBRATION MONITORING
    • VIBRATION ANALYSIS
    • MACHINE CONTROL
    • MODAL ANALYSIS
    • ROBOTICS
    • CRASH TESTING
    • INSTRUMENTATION

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.

Double Click for Case Schematic
Case Dimensions
PERFORMANCE by Model: VDD= +5 VDC, TC=25 °C.
Model Number 2012-005 2012-010 2012-025 2012-050 2012-100 2012-200 Units
Input Range ±5 ±10 ±25 ±50 ±100 ±200 G
Frequency Response (Nominal, 3 dB) 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 VDC, TC=25 °C, differential mode.
Parameter Min Typ Max Units
Cross Axis Sensitivity   2 3 %
Bias Calibration Error 3   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 Temp. Shift (TC= -55 to +125 °C) 3   +300   ppm/°C
Output Noise (0 - 1.0 kHz)   800   uV (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   7 9 mA
Mass (Not including Cable)   8   grams
Cable Mass   25   grams/meter

Notes:

  1. Voltages on the AOP & AON signal wires may exceed 0.5 volts above or below the supply voltages provided the current into or out of the device is limited to 1 mA.
  2. Single ended sensitivity is half of 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 2012 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 grounded before coming in contact with the wire ends.

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE