LS521

LS521 Version Issue Date File Name Total Pages : A.002 : 2015/07/10 : SP-LS521-A.002.doc : 12 ILLUMINATION-TO-DIGITAL CONVERTER with SMBUS INTERFACE 9 7 1 SILICON TOUCH TECHNOLOGY INC. 9-7F-1, Prosperity Road I, Science Based Industrial Park, Hsin-Chu, Taiwan 300, R.O.C. Tel：886-3-5645656 Fax：886-3-5645626 SILICON TOUCH TECHNOLOGY INC. LS521 ILLUMINATION-TO-DIGITAL CONVERTERS GENERAL DESCRIPTION The LS521 is a low-noise, high-sensitivity and illumination-to-digital converter with two-wire SMBus serial interface. The device integrates a photodiode, a trans-impedance amplifier, and 8-bits analog-to-digital converter (ADC) in a single IC to provide illumination information over an effective 8-bit dynamic range. The digital output is directly proportional to ambient illumination. The LS521 is characterized with the C.I.E. response as the human eye’s visual response, which peaks at 555nm. Illumination information can be used to control display panel backlighting with the purpose of extending battery life and providing optimum viewing in diverse lighting conditions. Also, illumination information can further be used to manage exposure control in digital cameras and camcorders. The LS521 device is ideal in notebook/tablet PCs, flat-panel televisions, cellular phones, LCD monitors, digital cameras, camcorder, and street/room lighting control, etc. FEATURES 1. Characterized with the C.I.E. response as the human eye’s response 2. 8-bit linear digital output for ambient ill...