TSL2580, TSL2581 Light-to-Digital Converter The TSL2580 and TSL2581 are very-high sensitivity General Description light-to-digital converters that transform light intensity to a digital signal output capable of direct IC (TSL2581) or SMBus (TSL2580) 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 16-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 TSL2580 device permits an SMB-Alert style interrupt, and the TSL2581 device supports a traditional level style interrupt that remains asserted until the firmware clears it. While useful for general purpose light sensing applications, the TSL2580/81 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 TSL2580/81 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 v1-00 2016-Apr-05 Document FeedbackT S L 258 0, T S L25 8 1 Ge n e r a l De s c ri p t i o n Key Benefits & Features The benefits and features of TSL2580, TSL2581, Light-to-Digital Converter are listed below: Figure 1: Added Value Of Using TSL2580, TSL2581 Benefits Features Enables Operation in IR Light Environments Patented Dual-Diode Architecture Enables Dark Room to High Lux Sunlight 1M:1 Dynamic Range Operation Digital Interface is Less Susceptible to Noise SMBus Digital Interface Enables Low Standby Power Consumption 3A Quiescent Current Reduces Board Space Requirements while Available in 1.25mm x 1.75mm Chipscale or 2mm x 2mm Simplifying Designs Dual Flat No-Lead (FN) Packages Approximately 30x More Sensitive Than the TSL2560/61 Device Approximates Human Eye Response Programmable ALS Interrupt Function with User-Defined Upper and Lower Threshold Settings 16-Bit Digital Output with SMBus (TSL2580) at 100 kHz or IC (TSL2581) Fast-Mode at 400 kHz Programmable Analog Gain and Integration Time Supporting 1,000,000-to-1 Dynamic Range Automatically Rejects 50/60-Hz Lighting Ripple Applications TSL2580, TSL2581, Light-to-Digital Converter is ideal for: Ambient Light Sensor (ALS) for Smart Phones, Digital Photo Frames, and Portable Navigation Systems ALS for LED Signs, Laptop Computers, and LCD TVs Page 2 ams Datasheet Document Feedback v1-00 2016-Apr-05