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Help CenterUltra High Performance (Bias Stability 0.5deg/h, ARW 0.20deg/h) MEMS Gyro Module With Up to 3 Axes
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Specifications
1.Excellent performance in vibration and shock environments;2.Iintegrated 32-bit microcontroller;
3. Flexible configuration .
Ultra High Performance (Bias Stability 0.5°/h, ARW 0.20°/h) MEMS Gyro Module With Up to 3 Axes
1 FEATURES
o Excellent performance in vibration and shock
environments
o 1, 2 or 3 axes offered in same package
o Electronically calibrated axis alignment
o Single-crystal silicon technology
o No intrinsic wear-out effects
o Low bias instability
o Low noise
o Digital interface, RS422
o Fully configurable:
o 5 different sample rates
o 5 different bandwidths
o LP filter -3dB frequency can be set
individually for each axis
o RS422 protocol, bit rate and line
termination
o Selectable output unit: angular rate
[deg/s], incremental angle [deg], average
angular rate [deg/s] or integrated angle [°]
o Excellent environmental robustness
o Miniature package
o Continuous self-diagnostics
2 GENERAL DESCRIPTION
STIM202 is a cluster of 1, 2 or 3 high accuracy MEMSbased
gyros in a miniature package. Any configuration of
axes can be provided. Each axis is factory-calibrated for
bias, sensitivity and compensated for temperature effects to
provide high-accuracy measurements in the temperature
range -40°C to +85°C. The unit runs off a single +5V supply.
STIM202 communicates via a standard high-level RS422 interface. The use of a 32 bit RISC ARM microcontroller
provides flexibility in the configuration, like choice of output unit, sample rate, LP filter -3dB frequency and RS422 bitrate
and protocol parameters. All configurable parameters can be defined when ordering or set by customer.
When STIM202 is powered up, it will perform an internal system check and synchronise the gyros. As an
acknowledgement of the complete power-up sequence, it will provide special datagrams containing data, like part
number, serial number, number of active axis and configuration parameters as mentioned above. STIM202 will then
automatically proceed to provide measurement data. Hence the simplicity of use is high: just connect power and
STIM202 will provide accurate gyro measurements over the RS422 interface.
The measurement data is transmitted as packages of data on a fixed format (datagram) at intervals given by the
sample rate. The datagram is in binary coded format in order to have an efficient transfer of data. In addition to the
measurement data itself, the datagram contains an identifier, a status byte and a CRC (Cyclic Redundancy Check)
byte to provide high degree of fault detection in the transmissions. The status byte will flag any detected errors in the
system.
For more advanced users, the gyro may be put in Service Mode. In this mode all the configuration parameters can be
intermediately or permanently changed by overwriting the current settings in the flash memory. In Service Mode the
commands and responses are in a human readable format; to enable the use of terminal-type software during typical
product integration. Service Mode also provides the ability to perform single measurements, perform diagnostics and
obtain a higher detail level of detected errors reported in the status byte.
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