Asset Publisher

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
Packages 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


Name Type Description Language Application Data RefBoard English

Technical Documents

Name Type Description Version Language
TSL277x_AN000532_1-00.pdf Application Note Using Interrupts and the Persistence Filter (DN 41) 1-00 English
LightSensors_AN000519_1-00.pdf Application Note Colorimetry Tutorial (DN 20) 1-00 English
ALSProxDetect_AN000531_1-00.pdf Application Note TSL2771 I2C Communications & Proximity Algorithm (DN30A) 1-00 English
TSL2772_BD000166_1-00.png Block Diagram TSL2772 Block Diagram 1-00 English
TSL2772_DS000181_2-00.pdf Datasheet Document version 1-00 2-00 English
TSL2772_FS000106_1-00.pdf Factsheet Ambient Light Sensors and Proximity Detection 1-00 English

Asset Publisher