Silicon Designs, Inc.

Model 2010

DIGITAL ACCELEROMETER MODULE

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FEATURES

• SENSOR:

  Hermetic Capacitive
  Micromachined
  Nitrogen Damped

• Digital Pulse Density Output
 • Low Power Consumption
 • -55 to +125°C Operation
 • Rugged Anodized Aluminum Module
 • Four Wire Connection
 • TTL/CMOS Compatible
 • +5VDC Power
 • No External Reference Voltage
 • Good EMI Resistance
 • Responds to DC & AC Acceleration
 • Easy Interface to Microprocessors or 
       the Model 3320 G-LoggerTM
 • Non Standard G Ranges Available

DESCRIPTION

The Model 2010 is a low-cost, single axis accelerometer module which is meant to be used with the Model 3020 G-LoggerTM Acceleration Acquisition System. Up to three 2010's may be connected to a G-LoggerTM using a Model 3901 Cable Adapter. The Model 2010 houses a Model 1010L integrated accelerometer which features a miniature, hermetically sealed, micromachined capacitive Sense Element, a custom integrated circuit sense amplifier, and sigma-delta A/D converter. It provides a TTL/CMOS compatible output signal for measuring accelerations in commercial/industrial environments and is tailored for zero to medium frequency instrumentation applications. It is relatively insensitive to temperature changes and gradients and the case is easily mounted via two #4 screws. Refer to Silicon Design's Model 1010 data sheet for detailed descriptions of the CLK & CNT signals.

ORDERING INFORMATION
Full Scale
Acceleration		 Model
Number

±5 G

2010-005
±10 G 2010-010
±25 G 2010-025
±50 G 2010-050
±100 G 2010-100
±200 G 2010-200

OPERATION

The Model 2010 accelerometer produces a digital pulse train in which the density of pulses (number of pulses per second) is proportional to applied acceleration. It operates with a single +5 volt power supply and requires a clock of 100kHz-1MHz. The output is ratiometric to the clock frequency and independent of the power supply voltage. 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. External digital line drivers can be used to drive long cables or when used in an electrically noisy environment.

SIGNALS (see 1010 data sheet for signal descriptions)

 

+5V: DC Power (red wire)
GND: Ground. (black wire)
SHIELD: Cable shield electrically connected to aluminum case.
CLK: Input reference clock; 100Khz-1MHz (white wire).
CNT: Count (digital pulse stream) output (green wire)

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 ............................................50 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=5.0VDC, TC=25°C.

Model Number

 2010-005

 2010-010

 2010-025

 2010-050

 2010-100

 2010-200

 Units
Input Range

 ±5

 ±10

 ±25

 ±50

 ±100

 ±200

G
Frequency Response (Nominal, 3 dB)

 0 - 600

 0 - 1000

 0 - 1600

 0 - 2000

 0 - 2500

0 - 2500

Hz
Sensitivity (FCLK=1MHz)

0.01

0.02

0.05

0.10

0.20

0.40

mG/pulse/sec
Max. Mechanical Shock (0.1 ms)

 2000

G


PERFORMANCE - All Models: Unless otherwise specified VDD=5.0VDC, FCLK=250kHz, TC=25°C.

 Parameter

 Min

 Typ

 Max

 Units
 Cross Axis Sensitivity

  

 2

 3

  %
 Bias Calibration Error 2

  

 1

 2

  % of FCLK (span)
 Bias Temperature Shift (TC= -55 to +125°C) 2

  

 100

 300

  (ppm of FCLK)/°C
 Scale Factor Calibration Error 2,3

  

 1

2

  %
 Scale Factor Temp. Shift (TC= -55 to +125°C) 2

  

 +300

  

  ppm/°C
 Non-Linearity (-90% to +90% of Full Scale) 2,3

  

 0.5

 1.0

  %
 Power Supply Rejection Ratio 40     dB
 Operating Voltage

 4.5

 5.0

 5.5

  V
 Operating Current 2

  

 2.0

 3.0

  mA
 Clock Input Voltage Range (with respect to GND)

 -0.5

  

 VDD+0.5

  V
 Mass (not including cable)

  

 8

  

  grams
 Cable Mass   25   grams/meter
Notes:
  1. Voltages on the CLK & CNT 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. Tighter tolerances available on special order.

  3. 100g versions and above are tested from -65 to +65 g.

CONNECTOR:  Switchcraft model EN3C6F (mating connector EN3L6M).

ALTERNATE OUTPUT VERSION AVAILABLE:  A custom version may be ordered which provides the DIR (direction) output instead of the CNT (count) output. For a description of the DIR signal, see the Model 1010 data sheet.

ESD CONSIDERATIONS:   The Model 2010 accelerometer is a CMOS device subject to damage by large electrostatic discharges. Diode protection is provided on the inputs and outputs but care should be exercised during handling of the connector or cable wire ends (without connector). Individuals and tools should be grounded before coming in contact with the connector pins or cable wire ends (without connector).

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE