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Digital proximity detector, LED driver and IR LED in an optical module Vdd I2C interface


  • Integrated proximity detection sensor and IR LED
  • Patented dual-diode architecture
  • 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
  • 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
Programmable Interrupt
Integrated Capabilities and Components IR LED
Recommended Operating Distances [cm] <15
Temperature Range [°C] -40 to 85
Packages Surface-mount module, pin count 8

General Description

The TMD2672 family of devices provides a complete proximity detection system and digital interface logic in a single 8-pin surface mount module. The device is register-set and pin-compatible with the TMD2671 series and includes new and improved proximity detection features. The proximity detection includes improved signal-to-noise and accuracy. 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. Interrupts have been enhanced with the addition of a sleep-on-interrupt feature that also allows for a single cycle operation. The device internal state machine provides the ability to put the device in a low power mode in between proximity measurements, providing very low average power consumption.

This product suits for the following applications:

  • Touchscreen control
  • Printer paper alignment and detection
  • Industrial process control
  • Mechanical switch


Name Type Description Language Application Data RefBoard English

Technical Documents

Name Type Description Version Language
ProxDetectMod_AN000526_1-00.pdf Application Note Proximity Detection Layout Recommendations (DN32A) 1-00 English
ProxDetectMod_AN000525_1-00.pdf Application Note Proximity Detection IR LED and Optical Crosstalk (DN 34) 1-00 English
ProxDetectMod_AN000524_1-00.pdf Application Note Proximity Detection and Optical Lenses (DN36) 1-00 English
LightSensors_AN000519_1-00.pdf Application Note Colorimetry Tutorial (DN 20) 1-00 English
TMD2672_BD000198_1-00.png Block Diagram TMD2672 Block Diagram 1-00 English
TMD2672_DS000342_1-00.pdf Datasheet Document version 1-00 1-00 English
TMD2672_FS000185_1-00.pdf Factsheet Proximity Detection Sensor Family 1-00 English

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