General Description
The TSL2560 and TSL2561 are light-to-digital converters that transform light intensity to a digital signal output capable of direct I²C (TSL2561) or SMBus (TSL2560) 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 TSL2560 device permits an SMB-Alert style interrupt, and the TSL2561 device supports a traditional level style interrupt that remains asserted until the firmware clears it.

Key Benefits & Features
The benefits and features of TSL2560 and TSL2561, Light-to-Digital Converters, are listed below:

FEATUREs
• Approximates Human Eye Response
• Programmable Interrupt Function with User-Defined
   Upper and Lower Threshold Settings
• 16-Bit Digital Output with SMBus (TSL2560) at 100kHz or
   I²C (TSL2561) 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
• Patented Dual-Diode Architecture
• 1M:1 Dynamic Range
• Programmable Interrupt Function
• SMBus (TSL2560) or I2C (TSL2561) Digital Interface
• Available in 1.25mm x 1.75mm Chipscale or
   2.6mm x 3.8mm TMB or 2mm x 2mm Dual Flat
   No-Lead (FN) Packages

Benefits
• Enables Operation in IR Light Environments
• Enables Dark Room to High Lux Sunlight
   Operation
• Reduces Micro-Processor Interrupt
   Overhead
• Digital Interface is Less Susceptible to
   Noise
• Reduces Board Space Requirements while
   Simplifying Designs