Struggling to develop wearable well being units quick? See a platform that tracks very important indicators, measures sleep and stress, and saves engineers months of design work.
Design engineers face a serious problem when creating wearable well being units: constructing correct, dependable sensors from scratch takes months, usually delaying product testing and scientific analysis. Amassing high-quality information for SpO2, ECG, coronary heart price, and different very important indicators whereas preserving energy consumption low provides additional complexity.
The MAXREFDES104# from the Analog Units (ADI) addresses these challenges. This third-generation well being sensor reference platform lets engineers rapidly check and consider wearable well being merchandise with out ranging from zero. It tracks blood oxygen saturation (SpO2), ECG, pulse price, coronary heart price (HR), physique temperature, and movement. Constructed-in algorithms present HR, heart-rate variability (HRV), respiration price (RR), SpO2, physique temperature, and analytics like sleep high quality and stress—all at clinical-grade accuracy. Engineers may even use it in scientific trials, saving months of growth time. The design is versatile, supporting wrist-worn units, chest patches, or good rings.
The platform makes use of a low-noise optical PPG and electrical ECG analog entrance finish (AFE) that delivers 110 dB signal-to-noise ratio (SNR) for SpO2 and over 110 dB common-mode rejection ratio (CMRR) for dry electrode ECG. Engineers can document PPG and ECG concurrently at completely different pattern charges, enabling pulse transit time measurement for cardiac well being purposes.
A extremely built-in energy and battery administration IC (PMIC) simplifies design by combining a high-accuracy ModelGauge m5 EZ gasoline gauge, haptic driver, and low-noise buck-boost converter. This ensures sign high quality whereas minimizing energy use, decreasing engineering effort in wearable gadget growth.
Bluetooth-enabled, ultra-low-power microcontrollers with twin Arm Cortex-M4F cores and SmartDMA let BLE run independently, releasing primary cores for different duties. The system additionally consists of security measures and reminiscence error-correcting code (ECC) for reliability.
For algorithm growth, an ultra-low-power microcontroller handles Maxim’s PPG algorithms for pulse price, SpO2, HRV, RR, sleep, and stress. It will probably act as a sensor or algorithm hub, controlling the MAX86176 sensor and offering uncooked or processed information, decreasing design workload.
Lastly, a small, low-power digital temperature sensor with 0.1 °C accuracy meets scientific requirements whereas utilizing 33 % much less present than options. It may be mounted on a flex cable or PCB, giving engineers flexibility in gadget format.
ADI has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) format, and extra. The corporate’s web site has further information in regards to the reference design. To learn extra about this reference design, click on right here.
