PPG Optical Path and Process Design for Wearable Devices

Wearable PPG measurement guide covering optical path, sub-board layouts, and light-window designs, with recommendations to improve heart rate and SpO2 accuracy.

Power Amplifiers for Wearable Devices

Technical overview of the AD8107 audio power amplifier for wearable devices, addressing output power, package size, EMI immunity, low shutdown current and application notes.

Single AFE Solution for Multi-Parameter Vital Signs Monitoring

Technical overview of a single AFE for multi-parameter vital signs monitoring, detailing PPG, SpO2, ECG, respiration, operating modes, and design trade-offs.

5 ESD Considerations for AR Wearables

Review of ESD protection and PCB layout strategies for wearable AR devices, covering diode selection, placement, routing, and key protection parameters.

Preventing Data Loss on STM32 During Power Failures

Preserving non-volatile data on STM32 during power loss: comparison of backup registers and internal flash, covering storage limits, access APIs, and design trade-offs.

ESD Protection for Wearable Devices

Technical guide to ESD protection in wearables: choosing low-capacitance, low-clamp-voltage TVS diodes and compact packages to maintain signal integrity.

Improving Multi-Sensor Readout Using Phase Division Multiplexing

Phase-division multiplexing (PDM) using maximal-length (ML) sequences to improve SNR and per-source sampling efficiency in reflective pulse oximetry versus TDM.

700-nA Quiescent Current Enables Always-On Wearable Designs

TI bq25120 battery management solution for wearables and IoT: integrated charger, low 700 nA quiescent current, I2C-configurable LDO/buck and battery monitor.

nRF5340: High-end multi-protocol SoC for advanced wearables

nRF5340 details: dual-core Arm Cortex-M33 SoC with advanced security (CryptoCell-312, TrustZone), multi-protocol 2.4 GHz radio and Bluetooth 5.1 support for IoT.

Security Management for Wearable Devices

Overview of embedded security for wearables using PSoC 64 Secure MCU: hardware root of trust, secure storage, hardware cryptography, TEE, and cloud integration for IoT devices.