OPT4041DTSR

OPT4041 Digital-Ambient Light Sensor

Texas Instruments OPT4041 High-Precision Digital-Ambient Light Sensor measures the intensity of visible light in two independent channels. The ALS channel's spectral response tightly matches the human eye's photopic response, whereas the WB channel's spectral response is wide and measures a broad spectrum of light. A specially engineered filter on the ALS channel rejects near-infrared components from common light sources to measure accurate light intensity. The output of the Texas Instruments OPT4041 is semi-logarithmic with binary logarithmic full-scale light ranges and a highly linear response within each range. The visible channel provides nine binary light ranges, providing measurement capability from 585µlux to 157klux and 28 bits of effective dynamic range. The wide band channel provides seven light ranges, providing measurement capability from 192.3pW/cm² to 12.91mW/cm² and 26 bits of effective dynamic range. The built-in automatic range selection logic dynamically adjusts the device gain settings based on the light level, providing the optimum possible resolution in all conditions without user input.