TSL2561 Light-to-Digital Converter The TSL2561 are light-to-digital converters that transform light General Description intensity to a digital signal output capable of direct IC interface. Each device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS integrated circuit capable of providing a near-photopic response over an effective 20-bit dynamic range (16-bit resolution). Two integrating ADCs convert the photodiode currents to a digital output that represents the irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response. The TSL2561 device supports a traditional level style interrupt that remains asserted until the firmware clears it. While useful for general purpose light sensing applications, the TSL2561 devices are designed particularly for display panels (LCD, OLED, etc.) with the purpose of extending battery life and providing optimum viewing in diverse lighting conditions. Display panel backlighting, which can account for up to 30 to 40 percent of total platform power, can be automatically managed. Both devices are also ideal for controlling keyboard illumination based upon ambient lighting conditions. Illuminance information can further be used to manage exposure control in digital cameras. The TSL2561 devices are ideal in notebook/tablet PCs, LCD monitors, flat-panel televisions, cell phones, and digital cameras. In addition, other applications include street light control, security lighting, sunlight harvesting, machine vision, and automotive instrumentation clusters. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet Page 1 v1-01 2018-Apr-23 Document FeedbackT S L2 561 Gen e ra l De s c rip t ion Key Benefits & Features The benefits and features of TSL2561, Light-to-Digital Converter is listed below: Figure 1: Added Value of Using TSL2561 Benefits Features Enables Operation in IR Light Environments Patented Dual-Diode Architecture Enables Dark Room to High Lux Sunlight 1M:1 Dynamic Range Operation Reduces Micro-Processor Interrupt Programmable Interrupt Function Overhead Digital Interface is Less Susceptible to 2 I C Digital Interface Noise Reduces Board Space Requirements while Available in 2.6mm x 3.8mm TMB Packages Simplifying Designs Approximates Human Eye Response Programmable Interrupt Function with User-Defined Upper and Lower Threshold Settings 16-Bit Digital Output with IC Fast-Mode at 400kHz Programmable Analog Gain and Integration Time Supporting 1,000,000-to-1 Dynamic Range Automatically Rejects 50/60Hz Lighting Ripple Low Active Power (0.75mW typical) with Power Down Mode Page 2 ams Datasheet Document Feedback v1-01 2018-Apr-23