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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
Package 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
Application Note Proximity Detection and Link Budget (DN38) English
Application Note Proximity Detection and IR Ink (DN 35) English
Application Note Proximity Calibration and Test (DN 37) English
Application Note Colorimetry Tutorial (DN 20) English
Application Note Optimizing Proximity Parameters English
Application Note Basic Pre-Production Light & Color Sensor Solution Validation Process English

Environmental documents

Type Description Language
RoHS Certificate RoHS Certificate_TMD2772_TMD2772WA English


Type Description Language
EoL Notification TMD27723INT17 (issued 2018-Mar) English
Product Change Notification CN15-2016 (TSL26721, TMD27723) English
Product Change Notification PCN42-2020 (issued 2020-Aug) English

Other information

Type Description Language
Block Diagram TMD2772 Block Diagram English
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