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TMD26723

Digital proximity detector, LED driver and IR LED in an optical module 1.8V I2C interface

Features

  • Integrated proximity detection sensor and IR LED
  • Patented dual-diode architecture
  • Proximity detection calibrated and trimmed to provide consistent reading
  • Programmable LED drive current

Benefits

  • 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.

This product suits for the following applications:

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

Technical Documents

Type Description Language
Application Note Proximity Detection and Optical Lenses (DN36) English
Application Note Colorimetry Tutorial (DN 20) English
Application Note Proximity Detection Layout Recommendations (DN32A) English
Application Note Proximity Detection IR LED and Optical Crosstalk (DN 34) English

Other Information

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

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