Integrated Biosensor with vAFE and 3-Axis Accelerometer

Cat No: BSS-LJX-0008 Datasheet

Product Name: Integrated Biosensor with vAFE and 3-Axis Accelerometer

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Basic Information

Detailed Description

This biosensor integrates a vAFE channel for detecting bioelectrical potential signals and a high-performance 3-axis digital accelerometer for motion tracking. The device employs an extremely compact, low-noise, and low-power vAFE design with configurable input impedance. The vAFE can read analog signals complementary to the motion signals. The vAFE and motion signals are inherently synchronized, enabling unique context-aware analysis that reduces power consumption and minimizes latency.

The easy integration and practical synchronization of the vAFE with the accelerometer sensor signal allows for independent processing within the MEMS sensor, fully leveraging its embedded ecosystem (including FSMs and MLCs) and reducing the microcontroller load. The device incorporates advanced dedicated functions and data processing capabilities for signal processing, such as finite state machines (FSMs), adaptive self-configuration (ASC), and machine learning kernels (MLCs) with derivative AI functions/filters.

The complete set of functionalities enabled by the sensor's target interface and embedded 128-level FIFO buffer sets a benchmark for system integration in terms of bill of materials, processing power, and power consumption. This embedded accelerometer features user-selectable ranges of ±2g/±4g/±8g/±16g and measures acceleration at output data rates from 1.6 Hz to 800 Hz.

The product includes a dedicated internal engine for handling motion and acceleration detection, including free fall, wake-up, single/double/triple hit recognition, active/resting, and 6D/4D orientation recognition. Its slim, small plastic pad grid array (LGA) package ensures normal operation over a wider temperature range (-40 °C to +85 °C).

Functions

• Bio-potential Sensing: Using the programmable vAFE channel with a 12-bit ADC to read analog signals like heart rate.
• Motion Tracking: Using the 3D accelerometer to measure acceleration with selectable full-scale ranges (±2g to ±16g).
• On-chip Processing: Embedded features like a Machine Learning Core (MLC) and Finite State Machines (FSM) allow the sensor to handle data processing independently, offloading work from the main system microcontroller.

Applications

• Wearable healthcare devices (e.g., smart patches, fitness bands for heart rate monitoring with motion artifact compensation).
• Advanced predictive healthcare solutions requiring simultaneous bio-signal and motion analysis.
• Context-aware industrial applications where detecting both vibration/motion and electrical signals is beneficial.

Features

• Dual-Channel Design: Integrated vAFE (for bio-signals) and accelerometer (for motion).
• Ultra-Low Power: Consumes only 48.1 µA (typical) in high-performance mode, with a 2.6 µA shutdown mode.
• On-chip Intelligence: Includes Machine Learning Core (MLC), Finite State Machines (FSM), and Adaptive Self-Configuration (ASC) for edge processing.
• High-Resolution Accelerometer: Low noise (220 µg/√Hz) and programmable output data rates (1.6 Hz to 800 Hz).
• Configurable vAFE: Programmable gain, input impedance, and ADC resolution for the bio-signal channel.
• Digital Interfaces: Supports high-speed I²C, SPI, and MIPI I3C® interfaces.
• Data Buffering: Embedded 128-level FIFO buffer to prevent data loss.
• Compact & Robust: Tiny 2.0 x 2.0 x 0.74 mm LGA package with high shock resistance (10,000 g).
• Wide Voltage Range: Operates from 1.62 V to 3.6 V.

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For industrial/research use only. Not for personal/medical use.