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TSL27721 Ambient Light Sensor

Light-to-digital converter with proximity sensing, I2C Vbus = VDD interface


  • Patented dual-diode architecture
  • 8M:1 dynamic range
  • UV rejection package
  • Proximity offset adjustment
  • Proximity saturation indicator bit


  • Enables operation in IR light environments
  • Enables operation in 60K lux sunlight and accurate sensing behind spectrally distorting materials
  • Improves lux accuracy across varying light sources
  • Compensates for internal system offset or IR LED crosstalk
  • Prevents false proximity detection in bright light

Product parameters

Supply Voltage [V] 2.4 - 3.6
Programmable Gain, Integration time, Interrupt
Integrated Capabilities ALS, Prox, LED Drvr.
Recommended Operating Distances [cm] < 15, < 46
Temperature Range [°C] −30 to 70
Package FN, pin count 6

General description

The TSL2772 device family provides both ambient light sensing (ALS) and, when coupled with an external IR LED, proximity detection. The device family is based on the TAOS patented dual-diode technology that enables accurate ALS results and approximates human eye response to light intensity under a variety of lighting conditions.

This product suits for the following applications:

  • Display backlight control
  • Touchscreen control
  • Medical diagnostics
  • Industrial process control
  • Printer paper alignment and detection


Title Category Headline Buy
TSL2772EvalKit Application Board Evaluation Kit for TSL2772

Technical documents

Type Description Language
Datasheet Document version 2-00
Application Note Using Interrupts and the Persistence Filter (DN 41) English
Application Note TSL2771 I2C Communications & Proximity Algorithm (DN30A) English
Application Note Colorimetry Tutorial (DN 20) English
Application Note Basic Pre-Production Light & Color Sensor Solution Validation Process English


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

Other information

Type Description Language
Block Diagram TSL2772 Block Diagram English
Factsheet Ambient Light Sensors and Proximity Detection English
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