STMicroelectronics IIS2DULPX Digital 3-Axis Linear Accelerometer
The STMicroelectronics IIS2DULPX intelligent digital 3-axis linear accelerometer is an accelerometer whose MEMS and ASIC are designed to combine the lowest possible supply current. The device is equipped with a finite state machine (FSM), always-on anti-aliasing filtering and a machine learning core (MLC) to support features such as analog hub/Qvar sensing channels and adaptive self-configuration (ASC). The FSM and MLC with ASC provide the IIS2DULPX with excellent edge processing capabilities that are always available, and the analog hub/Qvar sensing channels define a new level of system optimization. The IIS2DULPX MIPI I3C® target embedded 128-level FIFO buffer and interface have many features that make this accelerometer an ideal reference for system integration in terms of bill of materials, processing or power consumption.

The device has a full-scale range of ±2g/±4g/±8g/±16g, which is user-selectable, and can measure acceleration at output data rates from 1.6Hz to 800Hz. The STMicroelectronics IIS2DULPX has a dedicated internal engine for processing motion and acceleration detection, including free fall, wake-up, single/double/triple tap recognition, activity/inactivity, and 6D/4D orientation. The device is packaged in a small, thin plastic land grid array (LGA) package and is guaranteed to operate over a wide temperature range of -40°C to +105°C.

Features
3-axis accelerometer with digital output
Full scale: ±2g/±4g/±8g/±16g programmable
Output data rate; 1.6Hz to 800Hz, bandwidth up to 400Hz
High-speed I2C/SPI/MIPI I3C digital output interface
Ultra-low supply current and low noise (down to 220μg/√Hz)
Four operating modes:
9.3μA high performance (HP) mode with anti-aliasing filter
6.5μA low power (LP) mode with anti-aliasing filter
3μA ultra low power (ULP) mode
One-shot mode
Embedded machine learning core (MLC)
Programmable finite state machine (FSM)
Adaptive self-configuration (ASC) based on sensor processing output (FSM/MLC)
Embedded digital functions (free fall, wake-up, single/double/triple tap recognition, activity/inactivity, 6D/4D positioning, advanced pedometer, step detector and pedometer, significant motion detection and tilt detection)

Embedded FIFO with up to 128 accelerometer and temperature data samples (or analog hub/Qvar) or 256 low-resolution accelerometer data samples
External clock input for perfect synchronization with multiple sensors or controllers
Integrated analog hub/Qvar sensing channel
Embedded temperature sensor
Extended operating temperature range: -40 to +105°C
Supply voltage range
Independent I/O power supply (1.62V to 3.6V) for I2C and SPI interfaces
Independent I/O power supply (1.08 V to 3.6 V extended range) for MIPI I3C interface
2.0mm x 2.0mm x 0.74mm (max) LGA 12-lead small package
High shock survival: 10000 g
ECOPACK and RoHS compliant

Applications
Industrial IoT and factory automation
Asset tracking
Portable healthcare devices and hearing aids
Anti-tamper devices
Wireless sensor nodes
Appliances and robotics
Motion-activated features