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MAXREFDES1207: Heart-Rate Monitor Wrist Band Using the MAX77651B

MAXREFDES1207

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Description

The MAXREFDES1207 is a reference design for wearable application based on a total Maxim® solution which includes the MAX32660, MAX30112, MAX77651B, and MAX40005. This solution demonstrates how a small size, low cost, low power, high accuracy heart-rate (HR) monitor can be easily implemented. This design can monitor heart rate using two green LEDs.

The MAX30112 is an optimized pulse-oximeter and heartrate AFE for wearable health. It has a high-resolution, optical readout signal-processing channel with built-in ambient light cancellation as well as high-current LED driver DACs to form a complete optical readout signal chain. With external LED(s) and photodiode(s), the MAX30112 offers the lowest power, highest performance heart-rate detection solution for wrist applications. The MAX77651B provides highly-integrated battery charging and power supply solutions for low-power wearable applications where size and efficiency are critical. The device features a SIMO buckboost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. A highly configurable linear charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA). The MAX32660 is an ultra-low-power, cost-effective, highly- integrated microcontroller unit (MCU) designed for battery- powered devices and wireless sensors. It combines a flexible and versatile power management unit with the powerful Arm® Cortex®-M4 with floating point unit (FPU). The MAX40005 is a tiny, single comparator which is ideal for a wide variety of portable electronics applications such as cell phones, media players, and notebooks that have extremely tight board space and power constraints. The design also contains an FTDI FT234 USB-to-serial UART interface.

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Designed, Built, Tested

Board pictured here has been fully assembled and tested. Not available for sale.

 

Maxim Devices (4)

Part Number Name Product Family Order Design kits and evaluation modules
MAX32660 Tiny, Ultra-Low-Power Arm Cortex-M4 Processor with FPU-Based Microcontroller (MCU) with 256KB Flash and 96KB SRAM MCU - Microcontroller Buy Now Design Kits
MAX30112 Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health Sensors Buy Now Design Kits
MAX77651 Ultra-Low Power PMIC with 3-Output SIMO and Power Path Charger for Small Li+ Power Management ICs Buy Now Design Kits
MAX40005 nanoPower 4-Bump Comparator in Ultra-Tiny 0.73mm x 0.73mm WLP/SOT23 Packages Amplifiers Buy Now Design Kits

Maxim Devices (4)

Part Number Product Family
MCU - Microcontroller
Tiny, Ultra-Low-Power Arm Cortex-M4 Processor with FPU-Based Microcontroller (MCU) with 256KB Flash and 96KB SRAM
Sensors
Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health
Power Management ICs
Ultra-Low Power PMIC with 3-Output SIMO and Power Path Charger for Small Li+
Amplifiers
nanoPower 4-Bump Comparator in Ultra-Tiny 0.73mm x 0.73mm WLP/SOT23 Packages

Design Files (4)

Title Type Size Date
maxrefdes1207-bom PDF 97KB 2019-07-09
maxrefdes1207-pcb PDF 2MB 2019-07-09
maxrefdes1207-schematic PDF 23KB 2019-07-09
MAXREFDES1207 Design Verification Testing PDF 203KB 2019-07-09
Date Type
2019-07-09

maxrefdes1207-bom

(PDF, 97KB)

2019-07-09

maxrefdes1207-pcb

(PDF, 2MB)

2019-07-09

maxrefdes1207-schematic

(PDF, 23KB)

2019-07-09

MAXREFDES1207 Design Verification Testing

(PDF, 203KB)

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