Wi-fi 6-Lead ECG Holter Monitor Reference Design

The wearable machine tracks ECG, coronary heart charge, respiratory, and temperature. It makes use of Bluetooth to ship real-time knowledge and has an influence system that lasts days.

Texas Devices’ wearable biosensing Holter reference design is an analysis platform for steady very important signal monitoring. It measures ECG, coronary heart charge, respiration, tempo pulse, temperature, and movement. The design contains the AFE159RP4 for low-power, high-resolution ECG acquisition with as much as six leads and the TMP119 for physique temperature monitoring. Information is transmitted through the CC2674R10, which helps Bluetooth Low Power 5.3, enabling real-time show on a smartphone or medical monitoring system.

An onboard LED supplies system standing indicators for lead-off detection, low energy, and Bluetooth connection. The system runs on two CR2032 batteries or one AAA battery, providing as much as six days of operation. Designed for functions reminiscent of medical sensor patches, ECG monitoring, and wearable health units, it helps a variety of healthcare and activity-tracking wants.

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The TPS61299x/xA is a synchronous increase converter with a 95nA ultra-low quiescent present and a mean enter present restrict. It supplies an influence answer for transportable units utilizing alkaline or coin cell batteries, making certain excessive effectivity beneath gentle masses for prolonged operation. The common enter present restrict helps forestall extreme battery discharge.

It helps an enter voltage vary of 0.5V to five.5V and an output voltage vary of 1.8V to five.5V. Totally different variations supply enter present limits from 5mA to 1.9A. The TPS61299 variant with a 1.2A restrict can ship as much as 500mA output from a 3V to 5V conversion, reaching about 94% effectivity at a 200mA load.

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For fast-load transients at 4.5V, 5V, or 5.5V output, the machine has an 8μs typical settling time when the output present shifts from 0A to 200mA. The TPS61299x helps a real shutdown perform when disabled, whereas the TPS61299xA features a pressure pass-through perform for various utility wants.

A number of the key options of the reference design contains:

• Small, single-chip Holter monitor for ECG, respiration, and tempo pulse detection
• Correct digital sensor for real-time physique temperature monitoring
• Bluetooth Low Power 5.3 with Arm Cortex-M33 for wi-fi knowledge switch
• Environment friendly energy system helps 2 CR2032 (3V) or 1 AAA (1.5V) battery, lasting 6 days
• Bluetooth platform helps wearable patches and Holter screens
• SimpleLink Join app shows ECG, respiration, tempo pulse, and temperature in actual time

The TPS62843 is a high-efficiency step-down converter with an ultra-low working quiescent present of 275nA (typical) and a 4nA shutdown present when disabled.

It makes use of DCS-Management to keep up a low, RF-friendly output voltage ripple, making it appropriate for powering radios. The machine operates at a typical switching frequency of 1.5MHz and maintains excessive effectivity even at gentle masses right down to 100μA.

TI has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) structure, and extra. The corporate’s web site has extra knowledge in regards to the reference design. To learn extra about this reference design, click on right here.