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Digital proximity detector, LED drvr., Vdd I2C interface


  • Patented dual-diode architecture
  • 2M:1 dynamic range
  • Programmable LED drive current
  • Programmable interrupt function
  • Area efficient 2mm x 2mm Dual Flat no-lead (FN) package


  • Enables operation in IR light environments
  • Enables operation in high lux sunlight and accurate sensing behind spectrally distorting materials
  • Allows multiple power level selection without external passives
  • Reduces microprocessor interrupt overhead
  • Reduces board space requirements while simplifying designs

Product parameters

Supply Voltage [V] 2.6 - 3.6
Programmable Gain, Integration time, Interrupt
Integrated Capabilities and Components
Recommended Operating Distances [cm] < 15
Temperature Range [°C] -40 to 85
Packages FN, pin count 8

General Description

The TSL2671 family of devices provides a complete proximity detection system and digital interface logic in a single 6-pin package. The device includes a digital proximity sensor with integrated LED driver for the required external IR LED. The proximity function offers a wide range of performance, with four programmable LED drive currents and a pulse repetition range of 1 to 32 pulses. The proximity detection circuitry compensates for ambient light, allowing it to operate in environments ranging from bright sunlight to dark rooms. This wide dynamic range also allows operation in short distance detection applications behind dark glass, such as cell phones. An internal state machine provides the ability to put the device into a low power mode for very low average power consumption.

This product suits for the following applications:

  • Touchscreen control
  • Notebook and monitor security
  • Industrial process control
  • Printer paper alignment and detection
  • Optical switch


Title Category Headline Buy
TSL2671EvalKit Application Board Evaluation Kit for TSL2671


Name Type Description Language Application Data RefBoard English

Technical Documents

Name Type Description Version Language
ProxDetect_AN000527_1-00.pdf Application Note Signal, Noise, Crosstalk - TCS3771 (DN33.2 Appendix) 1-00 English
ProxDetect_AN000528_1-00.pdf Application Note Signal, Noise, Offset - TSL2771 (DN33.1 Appendix) 1-00 English
ProxDetect_AN000529_1-00.pdf Application Note Signal, Noise, Offset and Proximity Sensors (DN33) 1-00 English
LightSensors_AN000519_1-00.pdf Application Note Colorimetry Tutorial (DN 20) 1-00 English
TSL2671_BD000199_1-00.png Block Diagram TSL2671 Block Diagram 1-00 English
TSL2671_DS000111_2-00.pdf Datasheet Document version 1-00 2-00 English

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