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TSL25911 Ambient Light Sensor

Light-to-digital converter with Vdd I2C interface


  • Highest sensitivity to 188µLux
  • Patented dual-diode architecture
  • 600M:1 dynamic range
  • Programmable interrupt function
  • UV-rejection package
  • Area efficient 2mm x 2.4mm Dual Flat no-lead (FN) package


  • Design flexibility for dark glass and placement
  • Enables operation in IR light environments
  • Enables dark room to sunlight operation
  • Reduces microprocessor interrupt overhead
  • Improves lux accuracy across various light sources

Product parameters

Supply Voltage [V] 2.7 - 3.6
Interface I2C - VDD
Programmable Gain, integration time, interrupt
Max. Lux 88000
Temperature Range [°C] -30 to 70
Packages FN (6-Pin)
Remark Industry leading dynamic range which drives both ultra low light sensitivity and bright sunlight operation

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.

This product suits for the following applications:

  • Display backlight control
  • Keyboard illumination control
  • Solid state and general lighting control
  • Printer paper detection


Title Category Headline Buy
TSL2591EvalKit Application Board Evaluation Kit for TSL2591


Name Type Description Language Application Data Refboard English Software English

Technical Documents

Name Type Description Version Language
AmbientLightSensors_AN000530_1-00.pdf Application Note TSL258x: Accurate ADC Readings after Enable (DN42) 1-00 English
LightSensors_AN000519_1-00.pdf Application Note Colorimetry Tutorial (DN 20) 1-00 English
AmbientLightSensors_AN000104_1-00.pdf Application Note Optical Window Design (DN13B) 1-00 English
AmbientLightSensors_AN000173_2-00.pdf Application Note Custom Lux Equation (DN28) 2-00 English
AmbientLightSensors_AN000172_2-00.pdf Application Note Ambient Light Sensing (DN26) 2-00 English
AmbientLightSensors_AN000171_2-00.pdf Application Note Auto-gain Algorithm (DN39) 2-00 English
AmbientLightSensors_AN000170_2-00.pdf Application Note Using the Lux Equation (DN29A) 2-00 English
AmbientLightSensors_AN000169_2-00.pdf Application Note Sensitivity to Temperature (DN24) 2-00 English
AmbientLightSensors_AN000168_2-00.pdf Application Note Sensitivity to Wavelength (DN23) 2-00 English
AmbientLightSensors_AN000167_2-00.pdf Application Note Radiometric and Photometric Measurements (DN21) 2-00 English
AmbientLightSensors_AN000268_1-00.pdf Application Note Improving Color Sensor Lux Accuracy 1-00 English
TSL2591_BD000159_1-00.png Block Diagram TSL2591 Block Diagram 1-00 English
TSL2591_DS000338_6-00.pdf Datasheet Document version 2-04 6-00 English
TSL2591_FS000121_1-00.pdf Factsheet Ambient Light Sensors 1-00 English
TSL25911_PD000350_1-00.png Other Product Document TSL2591EvalKit Image 1-00 English

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