AN7487: Power Supply SubSystem for MAX30001-Based ECG Remote Patient Vital Sign Monitor

This application note is part of a series providing guidance for its readers to implement and validate a proven switch-mode power supply circuit for use in remote vital sign monitoring devices using Maxim Biosensing Analog Front Ends (AFEs). This document focuses on a vital sign monitor using the MAX30001 ECG AFE. Within this application note, readers will find reference schematics and layout (in popular EDA and PDF formats), validation check lists, and trouble-shooting guideline.

The figure below, shows a block diagram where the MAX30001 AFE device requires two power channels to power the digital supply, analog supply, and the OVDD (Logic Interface Voltage) supply.

This subsystem passes the performance limit criteria as specified by IEC60601 201.12.4.4.106 System Noise testing.

Please see the App Note 7487 page for:

• MAX38640A Reference Design Files

• MAX77642 Reference Design Files

• 1.8V SMPS Circuit Validation Checklist

• 1.8V SMPS Circuit Troubleshooting Guide