Sensonor STIM277H MEMS Gyro

Sensonor STIM277H MEMS Gyro

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The STIM277H from Sensonor is a tactical-grade, 3 axis MEMS gyro module built into a hermetic package. It is small, affordable, robust and reliable with ultra high performance (Bias Stability 0.3°/h, ARW 0.15°/√h). The package is a hermetic aluminum enclosure with a glass-to-metal sealed electrical micro-d connector and a laser-welded lid to secure long-term hermetic operation. All parts are tested for fine and gross leak to conform to MIL-STD-883J, Class H.

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Overview

The Sensonor STIM277H is a cluster of 3 high accuracy MEMS-based gyros in a miniature package. 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.

The STIM277H 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 STIM277H is powered up, it will perform an internal system check and synchronize the gyros. As an acknowledgement of the complete power-up sequence, it will provide special datagrams containing data, like part number, serial number and configuration parameters as mentioned above. The STIM277H will then automatically proceed to provide measurement data.

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.

Features

  • Small size, low weight and low cost
  • Hermetic package with no paint and separate label
  • ITAR free
  • Insensitive to magnetic fields
  • 10 °/h bias error over temperature gradients
  • 0.3 °/h bias instability
  • 0.15 °/√h angular random walk
  • ±400 °/s angular rate input range
  • 2000 samples per second
  • Backwards compatible with STIM210
  • 1500 g shock capability

Technical Specifications

Performance
Input Range:±400 °/s
Output:24 bit RS422
Bias Instability:0.3 °/h
Angular Random Walk:0.15 °/√h
Sampling Frequency:2000 SPS
Physical
Weight:52 g
Size:44.8 mm x 38.6 mm x 21.5 mm
Input Voltage:5 VDC
Environmental
Operating Temperature:-40 °C to +85 °C
Storage Temperature:-50 °C to +90 °C
Mechanical Shock:1500 g

Video

Ordering

The STIM277H MEMS gyro by Sensonor is available through Canal Geomatics. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.

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