The TSL2560T is a light-to-digital Converter that transforms light intensity to a digital signal output capable of direct SMBus interface. This converter 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. 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 in lux is derived using an empirical formula to approximate the human eye response. This device permits an SMB-alert style interrupt that remains asserted until the firmware clears it.
Approximates human eye response
Programmable interrupt function with user-defined upper and lower threshold settings
Programmable analogue gain and integration time supporting 1000000-to-1 dynamic range
Automatically rejects 50/60Hz lighting ripple
Low active power (0.75mW typical) with power down mode
Reduces micro-processor interrupt overhead
Digital interface is less susceptible to noise
Reduces board space requirements while simplifying designs
