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[原创] Maxim MAX86141(0)脉冲血氧计和心率传感器穿戴健康解决方案

关键词:穿戴设备 血氧计 心率传感器 可穿戴 MAX86141(0)

时间:2020-05-06 11:49:57       来源:中电网

Maxim公司的MAX86140/MAX86141是超低功耗全集成的光学数据采集系统.发送侧,MAX86140/MAX86141有三个可编程大电流LED驱动器,可配置成驱动多达六个LED.采用两个MAX86140/MAX86141器件可工作在主-从模式,LED驱动器可驱动多达12个LED.在接收侧,MAX86140有单个光学读出通路,而MAX86141有可同时单独工作的光学读出通路.器件有低噪音信件调理模拟前端(AFE),包括19位ADC,业界领先的环境光消除(ALC)电路,
栅状检测和替代算法.由于低功耗,紧凑的尺寸,容易/灵活使用和业界一流的环境光抑制能力,MAX86140/MAX86141非常适于各种光学检测应用如脉冲血氧和心率检测.MAX86140/MAX86141 1.8V主电源,LED驱动器电源3.1V-5.5V,支持标准SPI兼容的接口.每个器件有128字的内置FIFO.本文介绍了MAX86140/MAX86141主要特性和优势,框图,应用电路图以及健康传感器带MAXREFDES103#平台主要特性,框图和MAX86140/MAX86141评估系统EVSYS主要特性,电路图,材料清单和PCB设计图.

The MAX86140/MAX86141 are ultra-low-power, com­pletely integrated, optical data acquisition systems. On the transmitter side, the MAX86140/MAX86141 have three programmable high-current LED drivers that can be configured to drive up to six LEDs. With two MAX86140/MAX86141 devices working in master-slave mode, the LED drivers can drive up to twelve LEDs. On the receiver side, MAX86140 consists of a single optical readout channels, while the MAX86141 has two opti­cal readout channels that can operate simultaneously. The devices have low-noise signal conditioning analog front-end (AFE) including 19-bit ADC, an industry-lead ambient light cancellation (ALC) cir..

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