The OPT4001-Q1 is a light-to-digital sensor (single-chip lux meter) that measures the intensity of visible light. To measure accurate light intensity, a specially engineered filter on the device tightly matches the photopic response of the human eye and rejects the near-infrared component from common light sources. The output of the OPT4001-Q1 is semi-logarithmic with nine binary logarithmic full-scale light ranges along with a highly linear response within each range, bringing capability to measure from 312.5µlux to 84klux for the PicoStar™ variant, 437.5µlux to 117klux for the SOT-5X3 variant, and 400µlux to 107klux for the USON variant. This capability allows the light sensor to have a 28-bit effective dynamic range. The built-in automatic range-selection logic dynamically adjusts the device gain settings based on the light level, providing the best possible resolution in all conditions without user input.

The engineered optical filter on the OPT4001-Q1 provides strong near infrared (NIR) rejection. This filter aids in maintaining high accuracy when the sensor is placed under dark glass for aesthetic reasons.

The OPT4001-Q1 is designed for systems that require light level detection to enhance user experience and typically replaces low-accuracy photodiodes, photoresistors, and other ambient light sensors with underwhelming human eye matching and near-infrared rejection.Read more