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TMD27723 Ambient Light Sensor

Digital ambient light sensor, proximity sensor and IR LED in an optical module 1.8V I2C


  • Integrated ALS, proximity sensor, and IR LED
  • ALS based on patented dual-diodes
  • 1M:1 dynamic range
  • Proximity detection calibrated and trimmed to provide consistent reading
  • Programmable LED drive current


  • Module reduces board space and design effort
  • Enables operation in IR light environments
  • Allows accurate sensing behind spectrally distorting materials (e.g. dark glass)
  • Pre-calibration eliminates need for customer to calibrate the end-product
  • Allows multiple power level selection without external passives

Product parameters

Supply Voltage [V] 2.6 - 3.6
I²C Bus 1.8
Programmable Gain, integration time, interrupt
Integrated Capabilities ALS, Prox, LED Drvr. IR LED
Recommended Operating Distances [cm] <15
Temperature Range [°C] -40 to 85
Packages Surface mount module, pin count 8

General Description

The TMD2772 family of devices provides digital ambient light sensing (ALS), a complete proximity detection system, and digital interface logic in a single 8-pin surface mount module. The devices are register-set and pin-compatible with the TMD2771 family of devices and include new and improved ALS and proximity detection features. The ALS enhancements include a reduced gain mode that extends the operating range in sunlight. Proximity detection includes improved signal-to-noise performance and more accurate factory calibration. A proximity offset register allows compensation for optical system crosstalk between the IR LED and the sensor. To prevent false proximity data measurement readings, a proximity saturation indicator bit signals that the internal analog circuitry has reached saturation.

This product suits for the following applications:

  • Touchscreen control
  • Display backlight control
  • Medical diagnostics
  • Industrial process control
  • Optical switch


Title Category Headline Buy
TMD2772EvalKit Application Board Evaluation Kit for TMD2772

Technical Documents

Type Description Language
Datasheet Document version 1-21 English
Application Note I2C Timing Requirements English


Type Description Language
EoL Notification TMD27723INT17 (issued 2018-Mar) English
Product Change Notification CN15-2016 (TSL26721, TMD27723) English

Other Information

Type Description Language
Block Diagram TMD2772 Block Diagram English
Other Product Document TMD2772EvalKit Image English

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