Wireless ECG, SpO2, PTT and heart rate monitor reference design for medical and consumer wearable devices

This reference design is a simple wearable multi-parameter patient monitor using the AFE4900 single-chip biosensing front-end that provides simultaneous electrocardiogram (ECG) and photoplethysmograph (PPG) measurements. Measurement data is transmitted to the remote location via the CC2640R2F (supports BLE 4.2 and 5). The reference design runs on a single CR3032 battery with a battery life of 30 days. Users can use raw data to calculate heart rate, blood oxygen saturation (SpO2), pulse transit time (PTT) and ECG. Two onboard light emitting diodes (LEDs) indicate low battery detection and ECG lead loss detection conditions to the user.

characteristic

• ● Simple wearable multi-parameter patient monitor for PPG and ECG
• ● Provides raw data for calculating heart rate, SpO2 and PTT
• ● Using the single-chip biosensing front-end AFE4900, simultaneous ECG and PPG measurements can be achieved
  • ● PPG (optical heart rate monitoring and SpO2) supports four LEDs and three photodiodes (PD) with digital ambient reduction to improve signal-to-noise ratio (SNR)
  • ● ECG (LEAD I) signal
• ● Integrated Arm® Cortex®-M3 and 2.4GHz RF transceiver (CC2640R2F) supports wireless data transmission - BLE 4.2 and 5.0
• ● Powered by CR3032 (3V 500mA button battery), using a high-efficiency DC/DC converter, with a battery life of up to 30 days
• ● Small form factor, easily adaptable to wearable applications