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TIDA-01580

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

Design files

TIDA-01580

Design files

Overview

This reference design is a simple, wearable, multi-parameter, patient monitor that uses a single-chip, biosensing front end, AFE4900, for synchronized electrocardiography (ECG) and photoplethysmography (PPG) measurements. The measured data is transferred to a remote location using CC2640R2F (supporting BLE 4.2 and 5). The reference design is operated using a single CR3032 battery and provides a battery life of 30 days. The raw data is available for the user to calculate heart-rate, oxygen concentration in blood (SpO2), pulse-transit time (PTT), and ECG. Two onboard light-emitting diodes (LEDs) indicate low-battery detection and ECG lead-off detection for users.

Features
  • Simple, wearable, multi-parameter, patient monitor for PPG and ECG
  • Provides raw data to calculate heart rate, SpO2, and PTT
  • Uses single-chip, biosensing front-end AFE4900 for synchronized ECG and PPG measurements
    • PPG (Optical heart-rate monitoring and SpO2) supports four LEDs and three photodiodes (PDs), with digital ambient subtraction to improve signal-to-noise ratio (SNR)
    • ECG (LEAD I) signals
  • Integrated Arm® Cortex®-M3 and 2.4-GHz RF transceiver (CC2640R2F) supports wireless data transfer - BLE 4.2 and 5.0
  • Operated by CR3032 (3-V, 500-mA coin-cell battery), with battery life of 30 days using highly efficient DC/DC converters
  • Small form factor helps with easy adaptation to wearable applications
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Design guide — TIDA-01580
PDF | HTML
TIDUDO6B.PDF (8905 K)

Reference design overview and verified performance test data

download Schematic — TIDA-01580
TIDRW34A.ZIP (704 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-01580
TIDRW35A.ZIP (184 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

download Assembly drawing — TIDA-01580
TIDRW36A.ZIP (308 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-01580
TIDRW38A.ZIP (5686 K)

Files used for 3D models or 2D drawings of IC components

download Gerber file — TIDA-01580
TIDCEM2A.ZIP (930 K)

Design file that contains information on physical board layer of design PCB

download PCB layout — TIDA-01580
TIDRW37A.ZIP (1030 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Biosensing AFEs

AFE4900 — Ultra-low-power integrated AFE for wearable optical, electrical biosensing

Data sheet: PDF | HTML
Boost converters (integrated switch)

TPS61099 — 0.7Vin Synchronous Boost Converter with 800 nA Ultra-Low Quiescent Current

Data sheet: PDF | HTML
Buck-boost, inverting & split-rail converters (integrated switch)

TPS63036 — High Efficient Single Inductor Buck-Boost Converter with 1-A Switches

Data sheet: PDF | HTML
Buck-boost, inverting & split-rail converters (integrated switch)

TPS63900 — 1.8-V to 5.5-V, 75-nA IQ buck-boost converter with input current limit and Dynamic Voltage Scaling

Data sheet: PDF | HTML
Buck-boost, inverting & split-rail converters (integrated switch)

TPS63901 — 5.5-V buck-boost converter with 75-nA operating IQ in WCSP package

Data sheet: PDF | HTML
ESD protection diodes

TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet: PDF | HTML
Low-power 2.4-GHz products

CC2640R2F — SimpleLink™ 32-bit Arm® Cortex®-M3 Bluetooth® 5.1 Low Energy wireless MCU with 128-kB flash

Data sheet: PDF

Start development

Software

Technical documentation

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Type Title Date
* Design guide Wireless ECG, SpO2, PTT and Heart Rate Monitor Reference Design (Rev. B) PDF | HTML Oct. 05, 2020
Technical article VIDEO: Wearable, wireless patient monitoring demo with Bluetooth 5 PDF | HTML Jun. 27, 2019
Technical article Designing compact, efficient and high performing multiparameter patient monitors PDF | HTML Jun. 25, 2019
Application note Measuring CC13xx and CC26xx current consumption (Rev. D) PDF | HTML Jan. 10, 2019
Technical article No strings attached: Creating next-generation wireless patient monitors PDF | HTML Jun. 29, 2018
Technical article Optical heart-rate sensors for biometric wearables PDF | HTML May 03, 2018
Application note How to Design an SpO2 and OHRM System Using AFE4403 Mar. 02, 2015
Application note Understanding Lead-Off Detection in ECG (Rev. A) Jan. 14, 2015

Related design resources

Hardware development

EVALUATION BOARD
LAUNCHXL-CC2640R2 — CC2640R2 LaunchPad™ development kit for SimpleLink™ Bluetooth® Low Energy wireless MCU

Reference designs

REFERENCE DESIGN
TIDA-010029 — Wearable, 16-phase multi-sensor SpO2 and heart rate monitor (HRM) reference design with Bluetooth® 5

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