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TMD27713 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 TMD2771 family of devices provides digital ambient light sensing (ALS), a complete proximity detection system, and digital interface logic in a single 8-pin package. The proximity detector includes a digital proximity sensor, LED driver, and IR LED, which are trimmed to eliminate the need for end equipment calibration due to component variations. Excellent background light rejection allows the device to operate in environments from sunlight to dark rooms. The wide dynamic range allows for operation in short distance detection such as a cell phone (behind dark glass). An internal state machine provides the ability to put the device into a low power mode in between ALS and proximity measurements, providing very low average power consumption.

This product suits for the following applications:

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


Title Category Headline Buy
TMD2771EvalKit Application Board Evaluation Kit for TMD2771


Name Type Description Language Application Data RefBoard English

Technical Documents

Name Type Description Version Language
ALSProxDetectMod_AN000523_1-00.pdf Application Note Proximity Detection and Link Budget (DN38) 1-00 English
ALSProxDetectMod_AN000522_1-00.pdf Application Note Proximity Detection and IR Ink (DN 35) 1-00 English
ALSProxDetectMod_AN000521_1-00.pdf Application Note Proximity Calibration and Test (DN 37) 1-00 English
LightSensors_AN000519_1-00.pdf Application Note Colorimetry Tutorial (DN 20) 1-00 English
TMD2771_BD000178_1-00.png Block Diagram TMD2771 Block Diagram 1-00 English
TMD2771_DS000177_2-00.pdf Datasheet Document version 1-00 2-00 English
TMD2671_TMD2771_EN000100_1-00.pdf EoL Notification TMD2671, TMD2771 (issued 2018-Sep) 1-00 English
TMD2771_FS000109_1-00.pdf Factsheet Ambient Light Sensors and Proximity Detection 1-00 English
TMD27713_PD000354_1-00.png Other Product Document TMD2771EvalKit Image 1-00 English

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