The 3-Space™ Embedded is a compact surface-mount AHRS/IMU/VRU combining gyroscope, accelerometer, and magnetometer measurements with barometric pressure sensing. Measuring 23 x 23 x 1.95 mm and weighing 1.3 grams, it is ideal for SWaP-limited UAVs and robotic platforms requiring attitude, heading, and motion data.
The base accelerometer offers selectable ranges from ±2g to ±16g. An optional second accelerometer adds automatically selected high-range sensing up to ±320g for impact and high-dynamics measurements. Onboard QGRAD3 or Extended Kalman filtering provides update rates up to 2,000 Hz, and the World Magnetic Model provides true, magnetic, or grid north heading.
Castellated edge pads allow surface mounting or optional through-hole mounting. USB, SPI, I2C, and asynchronous serial interfaces provide host connectivity. An evaluation kit is available for testing before integration into an OEM design.
Specifications:
| Dimensions | 23 x 23 x 1.95 mm |
| Weight | 1.3 g |
| Supply voltage | 3.3–6.0 V |
| Current consumption | 10 mA minimum in low-power modes; 55 mA maximum at full performance |
| Interfaces | USB 2.0, SPI, I2C, asynchronous serial |
| Filter update rate | Up to 2,000 Hz (QGRAD3, Kalman AHRS, or IMU mode) |
| Dynamic orientation accuracy | ±1° (average when calibrated) |
| Orientation range | 360° about all axes |
| Accelerometer ranges | ±2 / ±4 / ±8 / ±16g |
| Gyroscope ranges | ±250 / ±500 / ±1,000 / ±2,000 / ±4,000°/s |
| Gyroscope bias stability | 1.5°/hr (average across axes at 25°C) |
| Orientation outputs | Quaternion, Euler angles, rotation matrix, axis angle, two-vector |
| High-range accelerometer option | ±32 / ±64 / ±128 / ±256 / ±320g |
| SPI / I2C clock rates | Up to 10 MHz / 4 MHz |
Maximum sensor update rates depend on communication and filter settings.
