BMI323
6-Axis MEMS IMU · I3C Interface · ±2000dps / ±16g · LGA-14 · Bosch Sensortec
| Part Number | BMI323 |
|---|---|
| Manufacturer | Bosch Sensortec |
| Sensor Type | 6-Axis (3-Axis Gyro + 3-Axis Accel) |
| Gyroscope Range | ±125 / ±250 / ±500 / ±1000 / ±2000 dps (selectable) |
| Accelerometer Range | ±2 / ±4 / ±8 / ±16 g (selectable) |
| Resolution | 16-bit (both gyro and accelerometer) |
| Current Consumption | 0.99 mA typical (6-axis normal mode) |
| Gyro Bias Stability | Excellent for drone attitude estimation |
| Data Output Rate | configurable up to 6.4 kHz |
| Package | LGA-14 (2.5×3.0×0.83mm) |
| Supply Voltage | 1.71 V – 3.6 V |
| Operating Temperature | −40°C to +85°C |
| Supply Voltage (VDD) | 1.71 V – 3.6 V |
|---|---|
| VDDIO (I/O Voltage) | 1.71 V – 3.6 V |
| Current (6-Axis Normal) | 0.99 mA typical |
| Current (Low Power) | ~0.5 mA (accel-only low-power mode) |
| Sleep Mode Current | < 3 µA |
| FIFO Buffer | 2 KB hardware FIFO |
| Motion Detection | Built-in wake-on-motion, tap, step detection |
| Interrupt Output | Configurable interrupts for data ready, motion |
| A/D Resolution | 16-bit (both axes) |
| Low Pass Filter | On-chip configurable digital LPF |
| Digital Interface | I3C (up to 12.5 MHz), I²C (up to 400 kHz), SPI (up to 10 MHz) |
|---|---|
| I3C Support | MIPI I3C basic compliant — next-gen FC interface |
| I²C Address | Selectable (0x68 or 0x69 via AD0 pin) |
| SPI Mode | Mode 0, Mode 3 supported |
| FIFO Features | 2 KB, supports bypass, FIFO, and watermark modes |
| Interrupt Pin | INT1 and INT2, configurable polarity |
| Self-Test | Built-in self-test for both gyro and accel |
| Register Compatibility | Similar to BMI270 register map |
| Pins | 14-pin LGA (SDI, SDO, SCLK, CSb, AD0, INT1, INT2, VDDIO, GND, VDD, PS, NC) |
| Part Number | BMI323 |
|---|---|
| Orderable Qty | 1 pcs – 10,000+ pcs |
| Price (1–9 pcs) | Contact for quote |
| Price (10–99 pcs) | Contact for quote |
| Price (100–499 pcs) | Contact for quote |
| Price (500+ pcs) | Best pricing available |
| Lead Time (stock) | 3–7 business days |
| Packaging | Tape & Reel (T&R) |
| RoHS Compliant | Yes (Pb-free) |
Please confirm exact parameters with manufacturer datasheet.
The BMI323 is Bosch Sensortec's latest-generation 6-axis MEMS inertial measurement unit, combining a 3-axis gyroscope and a 3-axis accelerometer in an ultra-compact LGA-14 package (2.5×3.0×0.83mm). As the successor to the widely-adopted BMI270, the BMI323 brings significant improvements including MIPI I3C basic compliance for next-generation flight controller interfaces, enhanced gyroscope bias stability for more accurate drone attitude estimation, and a flexible digital interface suite supporting I3C, I²C, and SPI communication protocols.
One of the key advantages of the BMI323 for UAV applications is its excellent gyroscope bias stability. In drone flight controllers, gyroscope bias drift directly affects attitude estimation accuracy, especially during prolonged flights or under temperature variations. The BMI323's improved MEMS design and on-chip temperature compensation minimize this drift, resulting in more stable hover performance and reduced attitude error accumulation over time. This makes it particularly well-suited for long-duration survey drones, mapping UAVs, and cinematography platforms where precise orientation knowledge is critical.
The I3C interface support is a forward-looking feature that sets the BMI323 apart from most competing IMU sensors. MIPI I3C (Improved Inter-Integrated Circuit) is the successor to I²C, offering higher data rates (up to 12.5 MHz in the BMI323 implementation), lower power consumption through dynamic addressing, and built-in hot-join capability. While currently most flight controller MCUs (STM32F4/F7) use SPI or I²C, the upcoming STM32H7 and STM32U5 series include I3C peripheral support, making the BMI323 a future-proof IMU choice for next-generation drone autopilot designs.
With a typical current consumption of 0.99 mA in 6-axis normal mode, the BMI323 balances performance and power efficiency effectively. The 2 KB hardware FIFO buffer allows batch sensor data reads, reducing bus traffic and CPU interrupt overhead — a valuable feature for multi-sensor flight controller designs. The sensor also includes built-in motion detection features including wake-on-motion, tap detection, and step counting, which can be used to implement intelligent power management in battery-operated UAV systems. The BMI323 operates reliably across the industrial temperature range of −40°C to +85°C with a wide supply voltage range of 1.71V to 3.6V.
Key Features
- Latest-generation 6-axis IMU from Bosch Sensortec — successor to the popular BMI270
- MIPI I3C basic compliant interface — future-proof for next-gen flight controller MCUs
- Excellent gyroscope bias stability — minimizes attitude drift in long-duration UAV flights
- Wide gyro range: ±125 to ±2000 dps — configurable for different drone types
- 16-bit resolution on both gyroscope and accelerometer — high precision for attitude estimation
- 2 KB hardware FIFO buffer — reduces bus traffic and CPU overhead
- Built-in motion detection: wake-on-motion, tap, step detection for smart power management
- Compact LGA-14 package (2.5×3.0×0.83 mm) — pin-compatible with BMI270 footprint
- Wide operating voltage: 1.71V – 3.6V, industrial temperature −40°C to +85°C
Need BMI323 for Your Drone Project?
Get competitive pricing and fast delivery from UAVCHIP. In stock for immediate shipment worldwide. I3C-ready for next-gen designs.
The BMI323 is Bosch Sensortec's latest 6-axis IMU. Please confirm exact ordering code and package specifications before production purchase. The LGA-14 package is pin-compatible with BMI270, simplifying upgrades. For I3C interface designs, ensure your MCU supports MIPI I3C basic (not full I3C). Contact UAVCHIP for datasheet, evaluation board recommendations, and volume pricing for your drone production requirements.
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