APDS-9800 is a module that integrates functions of ambient light sensor (ALS) and proximity sensor (PS). The sensor is composed of three chips in one small package: ambient light sensor IC, proximity sensor signal conditioning circuitry and a proximity sensor that includes both emitter (LED) and detector. The ambient light sensor has current output, with spectral response close to the CIE standard photopic observer. The proximity sensor signal conditioning circuitry consists of LED driver and receiver circuit with both analog and digital output, featured with excellent ambient light cancellation capability. With built-in LED, the proximity sensor is able to sense the proximity of an object, such as finger or head to a portable device.