With the healthcare technologies being researched and developed today, remote patient monitoring and diagnostics could replace some doctor’s office visits tomorrow. Wearable devices as small as patches could be used to measure vital signs and, perhaps, administer treatments. Making this possible are an array of sensors, low-power microprocessors and, to protect all of the sensitive data being collected and transmitted, embedded security technologies.
Sensing solutions are enhancing quality of life by monitoring a variety of health parameters, such as heart rate, blood-oxygen levels, and blood pressure. Human body sensors output magnitude signals in the millivolt and microvolt ranges. Our integrated devices for wearable health applications combine sensors with amplification and conversion circuits within a single die or package. These small, high-accuracy solutions provide higher magnitude analog outputs or serialized digital outputs.
Power usage and processing capabilities are important selection criteria for micro-processing applications. To determine which system functions are best integrated into the microcontroller and which can be handled externally, it’s most effective to use a system partitioning strategy. Since wearable health devices read human body signals, the capabilities of any on-chip analog circuitry must also be considered to ensure they can accurately process low-level signals.
Given the small form factor of health-monitoring systems—such as medical patches and other wearables—low power consumption and long battery life are essential. The power system in these devices must be able to regulate voltage from a battery—a voltage source with a declining voltage output. The regulators must be efficient enough to maximize charge usage, and must also supply all of the power rails required by the design. The usable voltage range of a rechargeable Li+ battery ranges from 4.2V to approximately 3.2V. Most wearable products use main power rails that are below the minimum charge of a single-cell Li+ battery, so the main rails are typically sourced by a step-down regulator. Some functions within a wearable product may require a higher voltage level than that provided by a single-cell battery. Thus, the power management function must contain at least one step-up regulator. The number of rails required depends on the device, but for optimum efficiency it is best to minimize the total number of rails.
Sensitive personal data collected and transmitted by wearable and mobile medical systems needs to be protected from the security breaches that are becoming all too common. Our embedded security technologies protect against tampering, cloning, counterfeiting, and other malicious attacks.
Ultra-Low-Power, Single-Channel Integrated Biopotential AFEMAX30003
Secure authenticator features factory-programmed, unique 64-bit ROM identification number.
Human Body Temperature SensorMAX30205
Sensor accurately measures temperature and provides overtemperature alarm/interrupts/shutdown output.
Secure Memory with I2C SHA-256 and 3Kb User EEPROMDS28C22
Secure memory features crypto-strong, bidirectional, secure challenge-and-response authentication.
Learn more about our Healthcare Solutions, including relevant applications, featured products, and technical resources.
|Tutorial||4702||Easily Add Memory, Security, Monitoring, and Control to Medical Sensors and Consumables|
|Application Note||5790||Boost Performance and Add Functionality to Portable Medical Devices Without Affecting the Power Budget|
How Remote Patient Monitoring Can Help Us Battle COVID-19
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In-Ear Heart-Rate Monitor Demo - electronica 2018
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Introduction to the MAX20343 Ultra Low Quiescent Current, Low Noise 3.5W Buck-Boost Regulator
Introduction to the MAX32664 Ultra-Low Power Biometric Sensor Hub
Introduction to the MAX86171 Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor AFE for Wearable Health
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Introduction to the MAX20340 Bidirectional DC Powerline Communication Management IC
Introduction to the MAX16158 Nanopower, Tiny Supervisor with Manual Reset Input
Introduction to the MAX16152 MAX16153* MAX16154* and MAX16155 nanoPower Supervisor and Watchdog Timer
Introduction to the MAXM86161 Single-Supply Integrated Optical Module for HR and SpO2 Measurement
Introduction to the MAX31341B Low-Current, Real-Time Clock with I2C Interface and Power Management
Introduction to the MAX30208 Low-Power, High-Accuracy Digital Temp Sensor
Introduction to the MAX30131 MAX30132 MAX30134 4-Channel Ultra-low Power Electrochemical Sensor AFE
How to Update the Firmware on the MAXREFDES101 Health Sensor Platform 2.0
Introduction to the MAX77654 Ultra-Low Power PMIC Featuring Single-Inductor, 3-Output Buck-Boost, 2-LDOs, Power Path Charger for Small Li+, and Ship Mode
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Introduction to the MAX86916 Integrated Optical Sensor Module for Mobile Health
Introduction to the MAX20353 Wearable Charge Management Solution
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