Avago公司的 APDS-9800集成了環境光傳感器(ALS),接近傳感器(PS)和環境光消除功能.在一個封裝內包含三個芯片: 環境光傳感器, 接近傳感器信號調理電路和接近傳感器.工作電壓2.4V到3.6V,光譜響應特性接近人眼睛,內置的LED和檢測器用于接近式傳感器,光靈敏度可隨光源而變,各種照明都保持線性輸出,主要用在PDA,手機,手提設備,筆記本電腦和上網本,娛樂設備,游戲機和售貨機.本文介紹了APDS-9800的主要特性, 功能方框圖以及典型應用電路和材料清單.
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.
By detecting the ambient light illuminance level, the ambient light sensor can control the brightness of display backlights.
The proximity sensor makes many interesting and useful applications possible. For example, a proximity sensor can detect the proximity of a mobile phone user’s head and turn off or on the phone keypad and LCD backlight.
By combining an ambient light sensor and proximity sensor in a single compact module, mobile phones, PDAs and notebooks can have additional features or benefit from increased performance, such as in battery life.
APDS-9800主要特性:
• Integrated module with ambient light sensor, proximity sensor and signal conditioning IC
• Small form factor: L 4.95 x W 3.0 x H 1.45 mm
• Supply voltage range: 2.4 V to 3.6 V
• Spectral responsivity closely matches the human eye
• Built-in LED and detector for proximity detection
• Low sensitivity variation across various light sources
• Linear output across a wide illumination range
• Operates under strong sunlight and artificial light
• Controlled LED driving current, pulse and burst parameters
• Controlled output voltage and integration time with an external resistor and capacitor
• LED stuck High protection
• Both analog and digital outputs available
• Shutdown mode for low current consumption
• Lead-free and RoHS compliant
APDS-9800應用:
• PDAs
• Mobile phones
• Portable and handheld devices
• Personal computers, netbooks and notebooks
• Amusement products
• Games
• Vending Machines
圖1.APDS-9800功能方框圖
圖2.APDS-9800T典型應用電路
所用材料清單:
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