Rugged ±1 g to ±5 g
Biaxial Accelerometer with Signal Conditioning and Temperature Sensor
Technical Data*
Simplify Acceleration and Temperature Measurements
![[Picture of 23203B Biaxial Accelerometer]](23203B.gif)
The Summit Instruments 23203B accelerometer has two orthogonal axes
and a temperature sensor in a small rugged package. The small size and
built-in power regulation allow the 23203B to fit where other accelerometers
can't. A power source of +8 to +30 VDC is all that is required
to measure temperature and ±1 g, ±1.5 g, ±2 g, ±2.5 g,
±3 g, ±4 g, or ±5 g accelerations on each of two axes.
When extra precision is required, the high repeatability of the built-in
temperature allows precise compensation of temperature effects and alignment
data provided on the optional calibration certificate can be used to
compensate for transverse sensitivity and alignment errors.
Each axial sensor has been tested over the -40 to +85°C temperature
range. Each axis has a nominal full scale output swing of ±2 volts.
The zero g output level is nominally ±+2.5 volts. Precise values
for each axis are provided on the optional calibration certificate.
Custom versions of the 23203B can be provided for applications which
require different ranges and/or bandwidths.
Features and Benefits
- High Accuracy and Linearity over Wide Temperature Range
The voltage output for each axis of the 23203B is directly proportional
to the acceleration along that axis. Each DC-coupled output is fully
scaled, referenced, and temperature compensated. Accuracy is improved
by minimizing variations due to temperature and aging effects, resulting
in a sensor that is more stable over temperature than piezoelectric
or piezoresistive devices. Critical applications can use the built-in
temperature sensor to compensate for residual temperature effects.
- Calibration Certificate
Each 23203B can be supplied with an optional calibration certificate
listing gain, offset, and on-axis and transverse alignment parameters
needed to ensure rapid and efficient system implementation. The alignment
data can be used to compensate the measured values if needed.
- Self-Test on Digital Command
A TTL-compatible self-test input causes a simulated acceleration to
be injected into both accelerometers to verify channel integrity.
- Small Size
Complete conditioned biaxial accelerometer in less than a cubic inch.
- Built-in Power Supply Regulation
Unregulated DC power from +8 to +30 volts is all that is required
to measure accelerations on both axes. The 23203B is ideal for automotive
applications with the ability to survive both continuous reverse battery
to -20V and load dump transients to +60V.
- Easy installation
Built-in terminal block or cable with 9-pin connector makes it easy
to wire the 23203B. Two through holes and four tapped holes simplify
mounting.
- Suitable for Harsh Environments
The 23203B is robust and can be used in harsh environments. The unit
will survive 500 g powered and 1000 g unpowered.
Specifications
Ta = Tmin to Tmax, 8 <= Vs <= 30 V, Acceleration = 0 g, unless otherwise noted.
Parameter Min Typ Max Units Conditions/Notes
Range
Measurement Full Scale ±1 ±5 g On each axis
Must specify via -Rnnn
Shock survival, powered -500 +500 g Any axis for 0.5 ms
Recovers on power cycle
Shock survival, unpowered -1000 +1000 g Any axis for 0.5 ms
Sensitivity
At 25°C, ±5 g FSR 450¹ mV/g Precise values on
-C001 cal certificate
Drift Tmin to Tmax ±0.5 % % of sensitivity at 25°C
Zero G Bias Level
At 25°C 1.875 3.125 V Precise values on
-C001 cal certificate
Drift Tmin to Tmax ±0.2 g Repeatable,
can be compensated
Alignment Precise values on
-C001 cal certificate
Deviation from ideal axes ±2.0 ±3.0 degrees Can be compensated
Transverse Sensitivity 0.25 % Inherent sensor error,
excluding misalignment
Nonlinearity 0.2 % FSR Best fit straight line
Upper Cutoff Frequency 4.6 10000 Hz ±10% Must specify -Bnnn
Noise
Density 0.225 0.325 mg 4 Hz to 1 kHz
sqrt(Hz)
Amplitude DC to 100Hz 2.25 mg rms
Self Test Input Impedance 30 50 kOhm To ground
Temperature Sensor Precise values on
-C002 cal certificate
Sensitivity 8 mV/°K Vt at -40°C = 1.92V nom;
Vt at +85°C = 3.16V nom
+25°C Bias Level 2.4 2.6 V
Outputs
Voltage Swing 0.05 4.95 V Iout = ±0.5 mA
Capacitive Drive Capability 1000 pF
Power Supply (Vs)
Input voltage limits -20 +60 V -20V continuous,
>30V if <100ms,duty <1%
Input voltage - operating +8 +30 V
Input current 6 9 mA No load, quiescent
Rejection Ratio 80 120 dB DC
Temperature Range (Ta) -40 +85 °C Terminal block -T000
rated to -30°C
Mass 35 grams Precise value on
-C001 cal certificate
¹Scale linearly with range option Rnnn.
Mechanical
![[23203B Biaxial Accelemeter Dimensions]](2320XBM.gif)
Connections
![[23203B Biaxial Accelemeter Connector]](2320XBC.gif)
Pin 1 2 3 4 5 6 7 8 9
Signal A2+ Signal- T+ +5VOut A1+ Signal- SelfTest +Vs Gnd
Wire Brown Red Orange Yellow Green Blue Violet Grey White
23203B
Data Sheet
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