Avago APDS-9800环境光传感器手机应用方案
Avago公司的 APDS-9800集成了环境光传感器(ALS),接近传感器(PS)和环境光消除功能.在一个封装内包含三个芯片: 环境光传感器, 接近传感器信号调理电路和接近传感器.工作电压2.4V到3.6V,光谱响应特性接近人眼睛,内置的LED和检测器用于接近式传感器,光灵敏度可随光源而变,各种照明都保持线性输出,主要用在PDA,手机,手提设备,笔记本电脑和上网本,娱乐设备,游戏机和售货机.本文介绍了APDS-9800的主要特性, 功能方框图以及典型应用电路和材料清单.
The APDS-9800 integrates ambient light sensor (ALS), proximity sensor (PS) and ambient light cancelation functions in a single module. The module contains three chips in one small package: an ambient light sensor IC, a proximity sensor signal conditioning circuit and a proximity sensor that includes both an LED emitter and detector.
The ambient light sensor has a spectral response close to the CIE standard photopic observer and a current output.
The proximity sensor signal conditioning circuit has an LED driver and a receiver circuit that has both analog and digital outputs. With the built-in LED, the proximity sensor is able to sense the proximity of an object, such as a finger, hand or head that is close to a portable device. The PS also features an excellent ambient light cancellation circuit for operation in direct sunlight.
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