Texas Instruments OPT4003-Q1 Digital Ambient Light Sensor

Texas Instruments OPT4003-Q1 Digital Ambient Light Sensor is a dual-channel, light-to-digital sensor (single-chip lux meter and NIR power meter) that independently measures the intensity of visible and near-infrared (NIR) light. A specially engineered filter on the device tightly matches the human eye’s photopic response to measure accurate visible light intensity. It rejects the near-infrared component from common light sources. The NIR channel filter is specially engineered to provide high sensitivity to wavelengths in the near-infrared region while achieving high rejection of visible wavelengths with a sharp cutoff at 800nm. The output of the Texas Instruments OPT4003-Q1 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 535µlux to 143klux and 28 bits of effective dynamic range. The NIR channel provides seven light ranges, providing measurement capability from 409pW/cm² to 27mW/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 an excellent resolution in all conditions without user input.