# Adafruit BNO085 9-DoF IMU (sensor fusion)

> Adafruit 4754 BNO085 (BNO080-compatible) 9-DoF IMU with on-chip sensor fusion: accel ±8 g, gyro ±2000 °/s plus magnetometer, fused rotation vectors up to 1000 Hz from CEVA/Hillcrest SH-2 firmware, I2C (0x4A), UART-RVC or SPI, 3–5 V with regulator and level shifting, STEMMA QT, 25.6 × 22.7 × 4.6 mm, 2.5 g.

- Manufacturer: Adafruit Industries
- Part number: 4754
- Category: IMUs & motion sensors
- Canonical page: https://www.xirkit.io/products/adafruit-bno085-9-dof-imu-sensor-fusion-5a52
- Pinout: https://www.xirkit.io/products/adafruit-bno085-9-dof-imu-sensor-fusion-5a52/pinout
- Structured JSON: https://www.xirkit.io/products/adafruit-bno085-9-dof-imu-sensor-fusion-5a52/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Sensor type | ahrs |
| Sensor IC | BNO085 |
| Axes | 9 DoF |
| Accelerometer range | 8 ±g |
| Gyroscope range | 2,000 ±°/s |
| Max output data rate | 1,000 Hz |
| On-chip sensor fusion | Yes |
| Interface | I2C/SPI |
| I2C address | 0x4A (0x4B with DI high) |
| Weight | 2.5 g |
| Supply voltage | 3–5 V |
| Dimensions | 25.6 × 22.7 × 4.6 mm |

## Pinout (10 pins, 0 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| VIN | — | power in | — | power_in | — | — | — | — | — | — | — |
| 3Vo | — | power out | — | power_out | — | — | — | — | — | — | — |
| GND | — | ground | — | ground | — | — | — | — | — | — | — |
| SCL | — | i2c scl | — | scl | — | — | — | — | — | — | — |
| SDA | — | i2c sda | — | sda | — | — | — | — | — | — | — |
| DI | — | address | — | di | — | — | — | — | — | — | — |
| CS | — | spi cs | — | cs | — | — | — | — | — | — | — |
| INT | — | interrupt | — | int | — | — | — | — | — | — | — |
| RST | — | reset | — | rst | — | — | — | — | — | — | — |
| BT | — | other | — | bt | — | — | — | — | — | — | — |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.adafruit.com | 29.5 USD | in_stock | 2026-09-29 | https://www.adafruit.com/product/4754 |

## FAQ

**What voltage powers the Adafruit BNO085 9-DoF IMU?**

Supply range 3–5 V.

**How much does the Adafruit BNO085 9-DoF IMU cost?**

From $29.5 at www.adafruit.com. Prices are observed unit prices before tax and shipping.

**What are the Adafruit BNO085 9-DoF IMU dimensions?**

25.6 × 22.7 × 4.6 mm. A STEP model is available for enclosure fit checks.

**Where does this Adafruit BNO085 9-DoF IMU data come from?**

Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.

## Sources

- [Adafruit BNO085 9-DoF IMU (sensor fusion) datasheet](https://cdn-learn.adafruit.com/downloads/pdf/adafruit-9-dof-orientation-imu-fusion-breakout-bno085.pdf)
- [www.adafruit.com listing](https://www.adafruit.com/product/4754)

## Part graph

### Built from

- BNO085 — sensor on the Adafruit BNO085 9-DoF IMU Fusion Breakout

### Alternatives (by use case)

- [Adafruit BNO055 9-DoF IMU (absolute orientation)](https://www.xirkit.io/products/adafruit-bno055-9-dof-imu-absolute-orientation-1aef) — Both serve balance, orientation and motion tracking — check the trade-offs; $29.95 vs $29.5
- [Adafruit ICM-20948 9-DoF IMU (MPU-9250 Upgrade)](https://www.xirkit.io/products/adafruit-icm-20948-9-dof-imu-mpu-9250-upgrade-3f89) — Both serve balance, orientation and motion tracking — check the trade-offs; $29.5 vs $19.95