基于MAX30102可穿戴血氧和心率生物传感器解决方案

Maxim公司的MAX30102是高灵敏度血氧和心率生物传感器，包括内部的LED，光电检测器，光学元件，以及环境光抑制的低噪音电子学。单个1.8V电源，内部LED电源5.0V，通信通过标准的I2C接口进行，工作温度-40℃ 到 +85℃，微细5.6mm x 3.3mm x 1.55mm 14引脚封装，主要用在可穿戴设备以及健美辅助设备。本文介绍了MAX30102主要优势和特性，系统框图和功能框图，典型应用电路以及评估板MAX30102 EVK主要特性，子板和主板电路图，材料清单和PCB设计图。

The MAX30102 is an integrated pulse oximetry and heart-rate monitor module. It includes internal LEDs， photodetectors， optical elements， and low-noise electronics with ambient light rejection. The MAX30102 provides a complete system solution to ease the design-in process for mobile and wearable devices.

The MAX30102 operates on a single 1.8V power supply and a separate 5.0V power supply for the internal LEDs. Communication is through a standard I2C-compatible interface. The module can be shut down through software with zero standby current， allowing the power rails to remain powered at all times.

MAX30102主要优势和特性：

Heart-Rate Monitor and Pulse Oximeter Sensor in LED Reflective Solution

Tiny 5.6mm x 3.3mm x 1.55mm 14-Pin Optical Module Integrated Cover Glass for Optimal， Robust Performance

Ultra-Low Power Operation for Mobile Devices Programmable Sample Rate and LED Current for Power Savings

Low-Power Heart-Rate Monitor （《1mW）

Ultra-Low Shutdown Current （0.7μA， typ）

Fast Data Output Capability High Sample Rates

Robust Motion Artifact Resilience High SNR

-40℃ to +85℃ Operating Temperature Range

MAX30102应用：

Wearable Devices

Fitness Assistant Devices

图1.MAX30102系统框图

图2.MAX30102功能框图

图3.MAX30102典型应用电路

评估板MAX30102 EVK

The MAX30102 evaluation kit （EV kit） provides a provendesign to evaluate the MAX30102 integrated pulse-oximetryand heart-rate monitor integrated circuit （IC）。 The EV kitconsist of two boards. USBOSMB is the mother boardand MAX30102DBEVKIT is the daughter board thatincludes the MAX30102 and an accelerometer. The EVkit is powered using the USB supply to generate +1.8Vfor the sensor and +4.5V for the internal LEDs of theMAX30102， and +3.3V for the accelerometer.The EV kit comes with a MAX30102EFD+ installed in a14-pin OESIP package.

评估板MAX30102 EVK特性和优势：

●● Real-Time Monitoring

●● Flexible PCB Design

●● USB-Powered

●● On-Board Accelerometer

●● Proven PCB Layout

●● Fully Assembled and Tested

●● Windows® 7-， and Windows 8/8.1-CompatibleSoftware

图4.评估板MAX30102 EVK子板电路图

图5.评估板MAX30102 EVK子板PCB设计图：左：元件布局;右：层2

图6.评估板MAX30102 EVK子板PCB设计图：左：层3;右：元件面布线图

图7.评估板MAX30102 EVK子板PCB设计图：左：焊接面布局;右：焊接面元件布局

图8.评估板MAX30102 EVK主板电路图

图9.评估板MAX30102 EVK主板PCB设计图：元件面布局;右：元件面PCB布局

图810.评估板MAX30102 EVK主板焊接面PCB布局图

评估板MAX30102 EVK主板材料清单：