General Description

The TSL2591 is a very-high sensitivity light-to-digital converter that transforms light intensity into a digital signal output capable of direct I2C interface. The device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS integrated circuit. Two integrating ADCs convert the photodiode currents into 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 TSL2591 supports a traditional level style interrupt that remains asserted until the firmware clears it.

Features

Dual Diode

Programmable Analog Gain and Integration Time

600M:1 Dynamic Range

• Two Internal Interrupt Sources

• Programmable Upper and Lower Thresholds

• One Interrupt Includes Programmable Persistence Filter

User Selectable Sleep Mode

• Data Rates up to 400 kbit/s

• Input Voltage Levels Compatible with 3.0V Bus

Benefits

Approximates Human Eye Response

Flexible Operation

Suited for Operation Behind Dark Glass

Low Operating Overhead

Low Power 3.0 μA Sleep State

I2C Fast Mode Compatible Interface