Analog Devices Inc. ADPD105/ADPD106/ADPD107/ADPD108光度AFE
Analog Devices ADPD105/ADPD106/ADPD107/ADPD108光度模拟前端 (AFE) 采用一个集成式14位ADC和一个20位突发累加器，可与灵活的LED驱动器配合使用。这些AFE设计用于激发LED和测量光学返回信号。ADPD105/ADPD106/ADPD107/ADPD108 AFE提供灵活的0.122Hz至3820Hz采样频率范围。20位突发累加器支持每个采样周期20位。
板载采样到采样累加器每次数据读取最多可以获取27位。通过ADPD105和ADPD108上的1.8V I²C接口或ADPD106和ADPD107上的SPI实现数据输出和功能配置。控制电路包括灵活的LED信号传输和同步检测。对于通常由环境光引起的调制干扰，AFE具有一流的信号失调和破坏抑制性能。设计人员可以将这些AFE连接
特性
- 多功能光度前端
- 完全集成式AFE、ADC、LED驱动器和时序内核
- 具有一流的环境光抑制性能，无需光电二极管滤光器
- 三个370mA LED驱动器
- 每个光学样本具有多个灵活的LED短脉冲
- 20位突发累加器支持每个采样周期20位
- 借助板载采样到采样累加器，每次数据读取最多可以获取27位
- 低功耗工作
- SPI、I²C接口和1.8V模拟/数字内核
- 灵活采样频率范围为0.122Hz至3820Hz
- FIFO数据操作
应用
- 可穿戴式健康和健身监视器
- 临床测量，例如SpO2
- 工业监控
- 背景光测量
Additional Resources
Reducing the False Alarm Rate - How Smoke Alarms Can Pass the Hamburger Nuisance Alarm Test
The hamburger nuisance test is very hard to pass because the smoke particles from a burnt hamburger patty do not differ that much from normal smoke. Discover why the integrated optical module for smoke detection is a turning point.
Optical Integration Without Compromises
Shorten the overall design cycle for measuring heart rate, heart rate variability, and oxygen saturation by using a fully integrated optical module. Optics and electronics, all in a tiny package.
Condition-Based Monitoring of the Human Body
With advances in technology, vital sign monitoring will become increasingly common in various industries and throughout daily lives. Whether used for treatment or prevention, such health-related solutions call for reliable and robust technology.
How Reliable and Affordable Presence Detection Can Change the Space Management
With the growing role of presence detection, what are the advantages of active infrared sensors vs. passive infrared sensors?
How to Design A Better Pulse Oximeter
This article covers the fundamentals of SpO2 measurement and demonstrates how optical analog front ends (AFEs) can help create a better oximeter.
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