Wearable Health


Nearly all of the human-body signals traditionally monitored in a clinical environment can now be collected by a wearable product, very often with close to the same level of precision. These traditional signals include:

  • Pulse/Heart Rate
  • Blood Oxygen
  • Stress
  • Electrocardiogram (EKG/ECG)
  • Body Temperature
  • UV Light (Skin Exposure)



Applications


Power and Battery Management

In a wearable product the power system 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.

Power Management ICs for Wearables 

Processing

Power usage and processing capabilities are important selection criteria for micro-processing applications. A system partitioning strategy must be used to decide which system functions are best integrated into the microcontroller and which can be handled externally. Since wearable health devices read human body signals, the capabilities of any on-chip analog circuitry must also be taken into account to ensure they can accurately process low-level signals.

Microcontrollers for Wearable Applications 

Sensors

Human body sensors output very low magnitude signals, in the millivolt and microvolt range. 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.

Sensors for Wearable Applications 


Featured Products


High-Sensitivity Pulse Oximeter and Heart-Rate Sensor

MAX30101

Includes 3 LEDs (Red, IR, Green), photo diode, and AFE in a 5.6mm x 3.3mm x 1.55mm optical module for HR and SpO2 measurement.

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Development Platform for the MAX32630 Arm Cortex®-M4F MCU

MAX32630-EVKIT

Ultra-low power for wearables with 2MB flash, 512KB SRAM, and peripherals in a small, easy-to-use board.

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Rapid Development Platform for the MAX32630 Arm® Cortex®-M4F MCU

MAX32630FTHR

Ultra-low-power with on-board PMIC, 2MB flash, 512KB SRAM and peripherals in a tiny dual-row header board.

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Arm® Mbed-Enabled Development Platform for the MAX32625 ARM Cortex®-M4F MCU

MAX32625MBED

Includes prototyping area, Arduino-compatible connectors, 512KB flash, 160KB SRAM, USB interface, and GPIO devices.

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Ultra-Low Power Arm® Cortex® M4 with FPU Microcontroller for Wearables and IoT, with 2MB Flash and 512KB SRAM, and Advanced Cryptographic Hardware Engines

MAX32630/MAX32631

The MAX32630/MAX32631 feature an Arm® Cortex®-M4 with FPU CPU that delivers ultra-low power, high-efficiency signal processing functionality with significantly reduced power consumption and ease of use.

Wearable ECG and Heart Monitor Evaluation and Development Platform

MAX-ECG-MONITOR

The MAX-ECG-MONITOR evaluation and development platform, featuring the MAX30003 clinical-grade AFE, analyzes data and accurately tracks heart signals (ECG and heart rate).

Heart-Rate and Activity Monitor Evaluation and Development Platform

MAX-HEALTH-BAND

The MAX-HEALTH-BAND wrist-worn heart-rate and activity monitor provides a simplified means to extract high-accuracy vital signs and raw data from health sensors for wearable designs.

Wearable Charge-Management Solution

MAX14690

Extends Battery Life of Wearable Electronics

Arm Cortex-M4F Development Platform with Expansion Connectors for Battery-Powered Devices

MAX32620FTHR

Mbed-enabled development platform for the MAX32620 ultra-low-power microcontroller. On-board PMIC, fuel gauge, peripherals, and Pmod™ connectors enable rapid development with a small 0.9in x 2.0in board.

Wellness Measurement Microcontroller

MAX32600-KIT

This complete functional system includes a MAX32600 wellness measurement microcontroller, selectable power sources, headers for access to I/O port pins and the AFE, 8-digit LCD display, USB, UART, low-power Bluetooth® transceiver, and general-purpose IO.

Ultra-Low Power Arm Cortex M4 with FPU Microcontroller for Wearables and IoT, with up to 512KB Flash and 160KB SRAM

MAX32625/MAX32626

The MAX32625/MAX32626 feature an Arm® Cortex®-M4 with FPU CPU that delivers high-efficiency signal processing, ultra-low power consumption and ease of use.

Ultra-Low-Power Arm® Cortex®-M3 with Wellness Sensor Analog Front-End, Advanced Hardware Security, 256KB Flash and 32KB SRAM

MAX32600

High-Performance, Ultra-Low Power ARM Cortex-M4F with FPU-Based Microcontroller for Rechargeable Devices

MAX32620/MAX32621

Ultra-Low Power Cortex-M4F for Wearable Medical and Fitness Applications

Complete Evaluation Board for Ultra-Low Power Cortex-M4F Microcontroller

MAX32620-EVKIT

Power-optimized Arm® Cortex®-M4F. Optimal peripheral mix provides platform scalability. On-board bluetooth® 4.0 BLE transceiver with chip antenna.

Wearable Power Management Solution for Primary Cells

MAX20310

Wearable Power Management for Single-Cell Zinc Air, Silver Oxide, and Alkaline Battery Architectures

Analog-Rich Arm Cortex-M3 Development Platform

MAX32600MBED

Mbed™-enabled evaluation system for the MAX32600 ultra-low-power micro with advanced analog features and hardware security. Arduino connectors and prototyping space enable rapid development.

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Evaluation Board for Defibrillation/Surge/ESD Protector for Medical and Industrial Applications

MAX30034EVKIT

Fully tested board includes MAX30034 to absorb repetitive defibrillation and other high-energy pulses.

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High-Sensitivity Pulse Oximeter and Heart-Rate Sensor

MAX30102

Pulse Oximeter and Heart-Rate Biosensor for Wearable Health

Wearable Charge Management Solution

MAX14676

This battery-charge-management solution includes a linear battery-charger with 28V tolerant input, smart power control, and several power-optimized peripherals. A boost regulator with 5V to 17V output, and 3 programmable current sinks can drive a variety of LED configurations.


Solutions


Our wearable healthcare solutions provide additional information on designing wearable health products, including examples and block diagrams of typical wearable designs.

Wearable Healthcare Solutions



Introduction to the MAX32664 Ultra-Low Power Biometric Sensor Hub
5:35 min
February 2019