1 Basic Description

The BMI323 is a highly integrated, low power inertial measurement unit (IMU) that combines precise acceleration and

angular rate (gyroscopic) measurement with intelligent on-chip motion-triggered interrupt features. The BMI323 integrates

a 16 bit digital, triaxial accelerometer with range configurable to 2 g, 4 g, 8 g, 16 g

a 16 bit digital, triaxial gyroscope with range configurable to 125 =s, 250 =s , 500 =s , 1000 =s and 2000 =s

a 16 bit digital temperature sensor for an operating temperature range -40 C ... +85 C

Key Features

Compact standard size 2.5  3mm2 LGA overmold package, 14 pins, height 0.83mm

Primary digital interface with 10MHz SPI slave (4-wire, 3-wire), 12.5MHz I3C and up to 1MHz I²C (Fm+)

Sample rates (ODR): 0.78125 Hz . . . 6.4 kHz (nominal)

Programmable low-pass filtering

Wide power supply range: analog VDD 1.71 V ... 3.63 V and VDDIO 1.08 V ... 3.63 V, both independent

Ultra low current consumption: typ. 790 A (in full ODR and aliasing free operation)

Built-in power management unit (PMU) for advanced power management and low power modes

Rapid startup time: 2.5ms for accelerometer and gyroscope (fast start mode)

< 1ms group delay

2 KB on-chip FIFO data buffer for accelerometer, gyroscope, temperature, and sensor timestamps

Fast offset error compensation for accelerometer and gyroscope

Gyroscope: fast sensitivity error compensation for the gyroscope (max. sensitivity error < 1 )

Hardware synchronization of accelerometer, gyroscope and temperature (< 1 s)

Sensor time stamps for accurate system (host) and sensor (IMU) time synchronization (< 40 s)

Two independent programmable I/O pins for interrupt and synchronization events

On-chip interrupt engine and integrated smart features for always-on applications (e.g. activity, action, and gesture

recognition) using the IMU ultra-low power domain

motion detection,

step detector

plug ’n’ play step counter

orientation and flat detection

single tap, double tap, and triple tap detection

Feature set can be optimized for wearable, hearable and mobile applications via API

RoHS compliant, halogen and lead free