ST ST1VAFE6AXTR

The ST1VAFE6X is a biosensor embedding a vAFE channel to detect biopotential signals and a 6 - axis IMU featuring a high - performance 3 - axis digital accelerometer and 3 - axis digital gyroscope for motion tracking. The ST1VAFE6AX embeds advanced dedicated features and data processing for motion processing like the finite state machine (FSM), sensor fusion low power (SFLP), adaptive self - configuration (ASC), and machine learning core (MLC) with exportable AI features/filters. The ST1VAFE6AX is available in a small plastic, land grid array (LGA) package of 2.5×3.0×0.71 mm to address ultracompact solutions. The device has been designed with a very compact, low - power vAFE with configurable input impedance. The vAFE enables reading analog signals that are complementary to motion signals. The vAFE and motion signals are intrinsically synchronous, so the result is a unique context - aware edge analysis, thus low power and with the minimum possible latency. Easy integration and actual synchronization of the vAFE with the accelerometer sensor signal, allows standalone processing in MEMS sensors, leveraging the MEMS sensor embedded ecosystem, including FSM and MLC, offloading the microcontroller. Biopotential and motion data are available on the I²C / SPI / MIPI I3C interface. The event - detection interrupts enable efficient and reliable motion tracking and context awareness, implementing hardware recognition of free - fall events, 6D orientation, click and double - click sensing, activity or inactivity, stationary/motion detection and wake - up events. Embedded FIFO with compression and dynamic allocation of significant data allows overall power saving of the system with a FIFO buffer size up to 4.5 KB. The ST1VAFE6AX MEMS sensor module leverages the robust and mature in - house manufacturing processes already used for the production of micromachined accelerometers and gyroscopes. The various sensing elements are manufactured using specialized micromachining processes, while the IC interfaces are developed using CMOS technology that allows the design of a dedicated circuit, which is trimmed to better match the characteristics of the sensing element.

• LGA - 14L (2.5 x 3.0 x 0.71 mm) typ.
• Dual channels for biopotential signal detection and motion tracking
• Biopotential signal detection channel with analog hub
• Single - ended or differential input amplifier (vAFE) channel
• Digital notch filter to reduce powerline noise (50/60 Hz)
• ODR fixed at 240 Hz
• Biopotential and motion signals fully synchronized for context - aware analysis
• Programmable finite state machine for accelerometer, gyroscope, and vAFE data processing with high rate @960 Hz
• Machine learning core with exportable features and filters for AI applications
• “Always - on" experience with low power consumption
• Smart FIFO up to 4.5 KB
• ±2/±4/±8/±16 g full scale
• ±125/±250/±500/±1000/±2000/±4000 dps full scale
• SPI / I²C & MIPI I3C v1.1 serial interface with main processor data synchronization
• Embedded adaptive self - configuration (ASC)
• Embedded analog hub for ADC and processing analog input data
• Embedded sensor fusion low - power algorithm
• Embedded temperature sensor
• Analog supply voltage: 1.71 V to 3.6 V
• Independent IO supply (extended range: 1.08 V to 3.6 V)
• Compact footprint: 2.5 mm×3 mm×0.71 mm
• ECOPACK and RoHS compliant

• Heart rate, pulse monitoring, and ECG (electrocardiogram) for digital healthcare applications
• Wearable and portable devices
• Activity tracking and well - being