3-Space™ USBC-H-B
The 3-Space™ USBC-H-B is the board-level variant of the USBC AHRS/VRU/IMU, designed for integration into OEM enclosures and electronic assemblies. Its 10-DOF sensing system combines a triaxial gyroscope, dual auto-selecting accelerometers, magnetometer, and barometric pressure sensor on a board weighing 4 grams.
The sensor provides QGRAD3 or Extended Kalman filtering at up to 2,000 Hz and acceleration measurement ranges up to ±320g. The integrated World Magnetic Model provides true, magnetic, or grid north heading. In addition to USB-C, UART, and RS232, the board-level version offers SPI and I2C interfaces for connection to embedded host processors.
Specifications:
| Dimensions | 32 x 25 x 6.35 mm |
| Weight | 4 g |
| Supply voltage | 3.3–6.0 V |
| Current consumption | 75 mA at 5 V, full performance |
| Interfaces | USB 2.0 via USB-C, SPI, I2C, UART, RS232 |
| 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; ±32 / ±64 / ±128 / ±256 / ±320g |
| 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 |
| SPI / I2C clock rates | Up to 10 MHz / 4 MHz |
Maximum sensor update rates depend on communication and filter settings.
