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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
Package 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


Type Description Language
Application Data RefBoard English

Technical documents

Type Description Language
Datasheet Document version 1-00 English
Application Note Proximity Detection Layout Recommendations (DN32A) English
Application Note Proximity Detection IR LED and Optical Crosstalk (DN 34) English
Application Note Proximity Detection and Optical Lenses (DN36) English
Application Note Colorimetry Tutorial (DN 20) English
Application Note Optimizing Proximity Parameters English
Application Note Proximity Factory Calibration English
Application Note Basic Pre-Production Light & Color Sensor Solution Validation Process English

Environmental documents

Type Description Language
RoHS Certificate RoHS Certificate_TMD2672 English


Type Description Language
Product Change Notification PCN42-2020 (issued 2020-Aug) English

Other information

Type Description Language
Block Diagram TMD2672 Block Diagram English
Factsheet Proximity Detection Sensor Family English
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