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Texas Instruments AFE4900 | Demoboard TIDA-01580

Wearable, Wireless, Multi-Parameter Patient Monitor Reference Design

Overview

TopologyOther Topology
IC revisionE1

Description

This reference design is a simple, wearable, multi-parameter, patient monitor that uses a single-chip, biosensing front end, the AFE4900 device, for synchronized electrocardiography (ECG) and photoplethysmography (PPG) measurements. The measured data is transferred to a remote location using the CC2640R2F device (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 device 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

Typical applications

  • Digital Stethoscope / Electrocardiogram (ECG) / Fitness Machines / Pulse Oximeter / Wearable Fitness & Activity Monitor / Wireless Patient Monitor

Products

Order Code Data­sheet Downloads Product seriesλDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
CTol. CVR
(V (DC))
SizeDF
(%)
Ceramic TypeL
(mm)
W
(mm)
H
(mm)
Technical ReferenceL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
Samples
150060GS75000
STE ALT EAG LTS PSP CAD IGSWL-SMCW SMT Mono-color Chip LED Waterclear 525 Green 515 430 3.2 InGaN 140 0603 1.6 0.8 0.7
150060RS75000
STE ALT EAG LTS PSP CAD IGSWL-SMCW SMT Mono-color Chip LED Waterclear 625 Red 630 250 2 AlInGaP 140 0603 1.6 0.8 0.7
74404024022
STE ALT EAG CAD LTS PSP SPE IGS CADWE-LQS SMT Power Inductor 2512 2.5 2 1.2 2.2 1.65 1.9 80 83
885012206046
STE ALT EAG CAD LTS PSP CADWCAP-CSGP MLCCs 16 V(DC)100 nF ±10% 16 0603 3.5 X7R Class II 1.6 0.8 0.8 X7R0603104K016DFCT10000
Samples
Order Code Data­sheet Downloads Product seriesλDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
CTol. CVR
(V (DC))
SizeDF
(%)
Ceramic TypeL
(mm)
W
(mm)
H
(mm)
Technical ReferenceL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
Samples