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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
Package 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

Technical documents

Type Description Language
Datasheet TSL2572 Datasheet Version 2-00 English
Application Note TSL258x: Accurate ADC Readings after Enable (DN42) English
Application Note Optical Window Design (DN13B) English
Application Note Custom Lux Equation (DN28) English
Application Note Ambient Light Sensing (DN26) English
Application Note Auto-gain Algorithm (DN39) English
Application Note Using the Lux Equation (DN29A) English
Application Note Sensitivity to Temperature (DN24) English
Application Note Sensitivity to Wavelength (DN23) English
Application Note Radiometric and Photometric Measurements (DN21) English
Application Note Improving Color Sensor Lux Accuracy English
Application Note Colorimetry Tutorial (DN 20) English
Application Note Basic Pre-Production Light & Color Sensor Solution Validation Process English

Environmental documents

Type Description Language
Material Declaration Form MDF_300170029_DK_TSL25721 English
RoHS Certificate RoHS Certificate TSL2572 English


Type Description Language
Product Change Notification PCN42-2020 (issued 2020-Aug) English

Other information

Type Description Language
Block Diagram TSL2572 Block Diagram English
Factsheet Ambient Light Sensors English
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