company blog about Bosch BMI323 Six-Axis Inertial Measurement Unit: Low-Power, High-Precision Motion Sensing for Smart Wearables and IoT Applications

Introduction

In today’s digital age, from smartwatches to gaming controllers, and from laptop protection to industrial vibration monitoring, precise motion sensing has become a core necessity for smart devices. As a global leader in the MEMS sensor industry, Bosch Sensortec has introduced the BMI323, a versatile 6-axis inertial measurement unit (IMU) that combines high performance with cost-effectiveness.

As a key chip supplied by Shenzhen Mingjiada Electronics Co., Ltd., the BMI323 is redefining the way consumer electronics and industrial applications interact, thanks to its extremely low power consumption, integrated plug-and-play functionality, and highly competitive pricing.

I. Core Advantages of the BMI323: More Than Just Motion Detection—It’s a Smart Experience

The BMI323 not only integrates a 16-bit triaxial accelerometer and a 16-bit triaxial gyroscope but also features a built-in 16-bit digital temperature sensor and a 2KB FIFO buffer. Compared to its predecessor, the BMI160, it reduces power consumption by nearly 15% in high-performance mode (when the gyroscope and accelerometer operate simultaneously), consuming only 790µA, and offers the following breakthrough features:

Plug-and-play step counter: Incorporates Bosch’s proven algorithms, eliminating the need for engineers to develop from scratch and enabling direct output of precise step counts, thereby shortening development cycles.

Smart gesture and motion recognition: Supports single/double-tap and tap detection, as well as stationary/motion detection, which can be used for device wake-up and sleep management.

Integrated Self-Calibration (CRT): Compensates for drift caused by soldering stress through a static component fine-tuning function, ensuring post-soldering accuracy stability and reducing gyroscope sensitivity error to ±0.7%.

New I3C Interface: In addition to traditional I2C (1 MHz) and SPI (10 MHz), it is the first to support the faster, lower-power I3C bus, reducing system complexity.

II. Technical Specifications at a Glance

To assist engineers in product selection, the following is a summary of the BMI323’s key parameters:

Digital Resolution

Accelerometer (A): 16-bit

Gyroscope (G): 16-bit

Resolution

(A): 16-bit or 0.06 mg/LSB

(G): 16-bit or 0.004 dps/LSB

Measurement Range and Sensitivity (After Calibration)

(A)

±2 g: 16384 LSB/g

±4 g: 8192 LSB/g

±8 g: 4096 LSB/g

±16 g: 2048 LSB/g

(G)

±125 °/s: 262.1 LSB/°/s

±250 °/s: 131.1 LSB/°/s

±500 °/s: 65.5 LSB/°/s

±1000 °/s: 32.8 LSB/°/s

±2000 °/s: 16.4 LSB/°/s

Zero Offset (Typical over entire service life)

(A): ± 50 mg

(G): ± 1°/s

TCO

(A): ± 0.3 mg/K

(G): ± 0.04 °/s/K

Noise Density (Typical)

(A): 180 μg/√Hz

(G): 0.007 °/s/√Hz

Bandwidth (programmable)

(A) 6.2 Hz ... 1677 Hz

(G) 6.2 Hz ... 563 Hz

Selectable output data rate: 12.5 Hz ... 6.4 kHz

Digital I/O: SPI, I2C, I3C

Output Data Rate (ODR)

(A): 12.5 Hz … 6.4 kHz

(G): 25 Hz … 6.4 kHz

Digital I/O: I2C, I3C, and SPI

2 digital interrupts

Supply Voltage

1.71 ... 3.63 V (VDD)

1.08 ... 3.63 V (VDDIO)

Temperature Range: -40 ... +85 °C

Current Consumption (High-Performance Mode, A+G): 790 μA

LGA Package: 2.5 x 3.0 x 0.83 mm³

III. Wide Range of Applications: Covering Consumer and Industrial Sectors

With its compact LGA package (2.5 x 3.0 x 0.83 mm³) and wide operating temperature range (-40°C to 85°C), the BMI323 is widely applicable in the following fields:

Smart Wearables and Healthcare: Smartwatches, fitness bands, smart rings, and fitness tracking devices (accurate step counting, posture recognition).

Human-Machine Interaction and Gaming: Game controllers, VR controllers, smart remote controls, motion-sensing toys (motion mapping, tilt control).

Mobile Computing and Laptops: Fall detection and hard drive protection for laptops, screen rotation for tablets, luggage trackers.

Industrial and IoT: Vibration monitoring for smart industrial equipment, robot posture stabilization, asset tracking, TWS earbuds (in-ear detection and tap control).

IV. Why Choose Shenzhen Mingjiada Electronics Co., Ltd. for Purchasing the BMI323?

As a premium supplier of the BMI323, Shenzhen Mingjiada Electronics Co., Ltd. leverages over 20 years of industry expertise to provide customers with supply chain solutions that go beyond just chips.

Genuine Products, Stable Supply Channels: Founded in 1996, Mingjiada has specialized in electronic component distribution and is ISO9001:2015 certified. All products (including the BMI323) are genuine OEM items, with strict quality control ensuring 100% authenticity.

In-Stock Inventory, Rapid Order Fulfillment: The company boasts a vast inventory advantage, supplying not only the BMI323 but also complementary components such as controller ICs, MOSFETs, and DC/DC chips. We offer delivery options in both Shenzhen and Hong Kong and support one-stop BOM fulfillment services, significantly saving customers time and procurement costs.

Inquire Now

Supplier: Shenzhen Mingjiada Electronics Co., Ltd.

Services: Genuine BMI323 in stock | One-stop BOM fulfillment | Shortage part sourcing

Contact: [Phone: +86 13410018555, Email: sales@hkmjd.com, Website: https://www.integrated-ic.com/]