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Digital proximity detector, LED driver and IR LED in an optical module 1.8V 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
I²C Bus 1.8V
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. Not Recommended for New Designs! ams does not recommend using the FN PACKAGE VARIANTS of this product for new designs. Please contact your local sales representative for further information regarding available or planned replacement options.

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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