➀ This reference design by Analog Devices outlines the preparation and operation of the MAXREFDES280, an integrated wrist-worn design for collecting biometric signals. ➁ The design includes a sensor band with the MAX86171 optical analog front-end (AFE) for evaluating performance across various body sites, focusing on wrist-based applications. ➂ The system is powered by a rechargeable LiPo battery and includes comprehensive integration resources for easy setup and utilization.