基于MAX30102可穿戴血氧和心率生物傳感器解決方案

Maxim公司的MAX30102是高靈敏度血氧和心率生物傳感器，包括內(nèi)部的LED，光電檢測器，光學(xué)元件，以及環(huán)境光抑制的低噪音電子學(xué)。單個1.8V電源，內(nèi)部LED電源5.0V，通信通過標(biāo)準(zhǔn)的I2C接口進(jìn)行，工作溫度-40℃ 到 +85℃，微細(xì)5.6mm x 3.3mm x 1.55mm 14引腳封裝，主要用在可穿戴設(shè)備以及健美輔助設(shè)備。本文介紹了MAX30102主要優(yōu)勢和特性，系統(tǒng)框圖和功能框圖，典型應(yīng)用電路以及評估板MAX30102 EVK主要特性，子板和主板電路圖，材料清單和PCB設(shè)計圖。

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主要優(yōu)勢和特性：

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應(yīng)用：

Wearable Devices

Fitness Assistant Devices

圖1.MAX30102系統(tǒng)框圖

圖2.MAX30102功能框圖

圖3.MAX30102典型應(yīng)用電路

評估板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.

評估板MAX30102 EVK特性和優(yōu)勢：

●● 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

圖4.評估板MAX30102 EVK子板電路圖

圖5.評估板MAX30102 EVK子板PCB設(shè)計圖：左：元件布局;右：層2

圖6.評估板MAX30102 EVK子板PCB設(shè)計圖：左：層3;右：元件面布線圖

圖7.評估板MAX30102 EVK子板PCB設(shè)計圖：左：焊接面布局;右：焊接面元件布局

圖8.評估板MAX30102 EVK主板電路圖

圖9.評估板MAX30102 EVK主板PCB設(shè)計圖：元件面布局;右：元件面PCB布局

圖810.評估板MAX30102 EVK主板焊接面PCB布局圖

評估板MAX30102 EVK主板材料清單：