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TSL25721 Ambient Light Sensor

Light-to-digital converter with Vdd I2C interface


  • Patented dual-diode architecture
  • 8M:1 dynamic range
  • Programmable interrupt function
  • UV-rejection package
  • Area efficient 2mm x 2mm Dual Flat no-lead (FN) package


  • Enables operation in IR light environments
  • Enables dark room to 60K lux sunlight operation
  • Reduces microprocessor interrupt overhead
  • Improves lux accuracy across various light sources
  • Reduces board space requirements while simplifying designs

Product parameters

Supply Voltage [V] 2.4 - 3.6
Interface I2C - VDD
Programmable Gain, integration time, interrupt
Max. Lux 10000
Temperature Range [°C] -30 to 70
Packages FN (6-Pin)

General Description

TSL2572 device family provides ambient light sensing (ALS) that approximates human eye response to light intensity under a variety of lighting conditions and through a variety of attenuation materials. Accurate ALS measurements are the result of TAOS’ patented dual-diode technology and the UV rejection filter incorporated in the package. The operating range can be extended to 60000 LUX when the low-gain mode is use. The TSL2572 device is particularly useful for enabling automatic brightness control (ABC) in large LCD flat-panel TVs and displays by providing optimum viewing in diverse lighting conditions (daytime versus nighttime viewing) while significantly reducing energy consumption to meet the stringent ENERGY STAR requirements.

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
TSL2572EvalKit Application Board Evaluation Kit for TSL2572


Name Type Description Language Application Data Refboard 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
TSL2572_BD000156_1-00.png Block Diagram TSL2572 Block Diagram 1-00 English
TSL2572_DS000178_3-00.pdf Datasheet Document version 1-01 3-00 English
TSL2572_FS000108_1-00.pdf Factsheet Ambient Light Sensors 1-00 English

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