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TMD3725 Color Sensor Module

3-in-1 small aperture color light sensor, proximity sensor and IR LED in an optical module 1.8V I²C


  • RGB + IR filters
  • High sensitivity down to mLux levels
  • 0.18µm process technology with 1.8V I²C
  • 1M:1 dynamic range
  • Programmable proximity offset adjustment
  • Proximity automatic ambient light subtraction


  • Provides <10% CCT accuracy
  • Design flexibility for dark glass & placement
  • Reduces power consumption
  • Enables dark room to sunlight operation
  • Compensates for unwanted IR energy system crosstalk reflection
  • Compensates for unwanted ambient light photodiode current

Product parameters

Supply Voltage [V] 1.7 - 2.0
I²C Bus 1.8V
Programmable Gain, integration time, interrupt
Integrated Capabilities
Recommended Operating Distances
Temperature Range [°C] -30 to 85
Package OLGA, pin count 8

General description

The TMD3725 features advanced proximity measurement, color sense (RGBC+IR), and digital ambient light sensing (ALS). The package has been designed to accommodate a “single hole” aperture approach. The slim module incorporates an IR LED and factory calibrated LED driver. The proximity detection feature provides object detection (e.g. mobile device screen to user’s ear) by photodiode detection of reflected IR energy (sourced by the integrated LED). Detect/release events are interrupt driven, and occur when proximity result crosses upper and/or lower threshold settings. The proximity engine features offset adjustment registers to compensate for unwanted IR energy reflection at the sensor. Proximity results are further improved by automatic ambient light subtraction. The ALS detection feature provides photopic light intensity data. The color photodiodes have UV and IR blocking filters and converts photodiode current into dedicated integrating data converters producing 16-bit data. This digital output can be interfaced with a microprocessor where illuminance and color temperature can be calculated to control a displays backlight and chromaticity.

This product suits for the following applications:

  • Display backlight control
  • Color temperature sensing to assist backlight, camera, and flash control
  • Ambient light sensing
  • Single hole proximity sensing


Type Description Language
Application Data EVM documentation v1_5 English

Technical documents

Type Description Language
Datasheet Document version 2-00 English
Application Note Lux and CCT Calculations (DN 40) English
Application Note Compensating for Light Flicker on Optical Sensors (DN 22) English
Application Note Improving Color Sensor Lux Accuracy English
Application Note Colorimetry Tutorial (DN 20) English
Application Note Optimizing Proximity Parameters English
Application Note Basic Pre-Production Light & Color Sensor Solution Validation Process English
Application Note Optical Force Sensing - design considerations English

Environmental documents

Type Description Language
Material Declaration Form MDF_503020008_TMD37253S English
Material Declaration Form MDF_503020052_TMD37253SH245V English
Material Declaration Form MDF_503020046_TMD37253H235V English
Material Declaration Form MDF_503020046_TMD37253SH235V English
Material Declaration Form MDF_503020008_TMD37253 English
Material Declaration Form MDF_503020008_TMD37253M English
Material Declaration Form MDF_503020008_TMD37253SH245V-SMP English
Material Declaration Form MDF_503020015_TMD37253SH210V English

Other information

Type Description Language
Block Diagram TMD3725 Block Diagram English
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