Precision Aligned ±1 g to ±5 g
Triaxial Accelerometer with Signal Conditioning and Temperature Sensor
Technical Data*
Precisely Measure Real-World Accelerations
![[Picture of 34203A Triaxial Accelerometer]](34203A.gif)
The Summit Instruments 34203A accelerometer has each mutually orthogonal
axis precisely aligned within 3/4 degree of the theoretical ideal. This
provides the accuracy required by most linear and angular measurement
applications without any compensation. Critical applications requiring
higher accuracy can use the alignment data provided on the optional
calibration certificate to compensate for any small residual error.
Unregulated +8 to +30V DC power is all that is required to measure
±1 g, ±1.5 g, ±2 g, ±2.5 g, ±3 g, ±4 g,
or ±5 g accelerations on each of three axes.
Each axial sensor has been tested over the -40 to +85°C temperature
range and 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 available on an optional calibration certificate.
Custom versions of the 34203A can be provided for applications which
require different ranges and/or bandwidths.
Features and Benefits
- Precision Alignment
Each Axis of the 34203A is precision aligned to minimize errors due
to axis misalignment or transverse sensitivity.
- High Accuracy and Linearity over Wide Temperature Range
The voltage output for each axis of the 34203A 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 34203A 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 to achieve an even
higher level of sensor accuracy.
- Self-Test on Digital Command
A TTL-compatible self-test input causes a simulated acceleration to
be injected into all three sensors to verify channel integrity.
- Small Size
Complete conditioned triaxial 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 all axes. The 34203A is ideal for automotive
applications with the ability to survive both continuous reverse battery
to -20V and load dump transients to +60V.
- Suitable for Harsh Environments
The 34203A 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 ±0.15 ±0.75 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 8 12 mA No load, quiescent
Rejection Ratio 80 120 dB DC
Temperature Range (Ta) -40 +85 °C
Mass 35 grams -M001 reduces mass to 25g
¹Scale linearly with range option Rnnn.
Connections
![[34203A Triaxial Accelemeter Connector]](3420XAC.gif)
Pin 1 2 3 4 5 6 7 8 9
Signal A1+ Signal- A2+ +5VOut A3+ T+ SelfTest +Vs Gnd
Wire Brown Red Orange Yellow Green Blue Violet Grey White
Mechanical
![[34203A Triaxial Accelemeter Dimensions]](3420XAM.gif)
34203A
Data Sheet
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