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TCS3701 Color and Proximity Sensor

Light-to-Digital Converter with I²C interface


  • Ultra-high ALS and color sensitivity
  • 1024x dynamic range
  • 0.18µm process technology with 1.8V I²C
  • High proximity crosstalk compensation
  • Companion non-predictive asynchronous algorithm


  • Enables maximum design flexibility for operation behind Organic LED displays or dark inked glass
  • Enables dark room to sunlight operation
  • Reduces power consumption
  • When combined with a VCSEL emitter enables operation behind OLED
  • Enables ambient light measurement during display blanking periods

Product parameters

Supply Voltage [V] 1.7 - 2.0
I²C Bus 1.8V
Programmable Gain, Integration Time, Interrupt
Integrated Capabilities
Recommended Operating Distances <50 cm
Temperature Range [°C] -30 to 70
Package FN, pin count 12

General description

The TCS3701 is a very-high sensitivity light-to-digital converter that features ambient light and color (RGB) sensing in parallel with IR proximity detection. The Ambient light and color sensing function provides five concurrent ambient light sensing channels: Red, Green, Blue, Clear, and Wideband. The RGB and Clear channels have a UV/IR blocking filter. This architecture accurately measures ambient light and enables the calculation of illuminance, chromaticity, and color temperature to manage display appearance. The proximity function synchronizes IR emission and detection to sense nearby objects. The IR driver needs to be connected to an external LED or VCSEL emitter. The architecture of the engine features self-maximizing dynamic range, ambient light subtraction, advanced optical crosstalk noise cancellation, 14-bit data output and interrupt-driven 1.8V I²C communications interface. Sensitivity, power consumption, and noise can be optimized with adjustable IR LED timing and power. The proximity engine recognizes detect/release events and produces a configurable interrupt whenever the proximity result crosses upper or lower threshold settings.

This product suits for the following applications:

  • Display backlight control
  • Display management
  • Ambient light sensing
  • Color temperature sensing to assist backlight, camera, and flash control


Title Category Headline Buy
Evaluation Kit for TCS3701 Application Board Evaluation Kit for TCS3701

Technical documents

Type Description Language
Datasheet Datasheet version v2-00 English
Application Note Minimizing Crosstalk and Emitter Placement English
Application Note ams Optical Sensors Design Recommendations for System EMI and ESD English
Application Note Basic Pre-Production Light & Color Sensor Solution Validation Process English
Application Note Optical Force Sensing - design considerations English
Product Brief Product overview TCS3701 English

Environmental documents

Type Description Language
RoHS Certificate RoHS Certificate TCS3701 English

Other information

Type Description Language
Block Diagram TCS3701 Block Diagram English
Image TCS3701 Back view
Image TCS3701 perspective view
Image TCS3701 Top view
TCS3701 - Display Management

Display Management

Check out color and proximity sensing solutions to operate behind OLED , paper-like displays which make text as readable on the display as it is when printed in a book. Our small aperture optical sensing devices are based on a refined analog front end and digital circuitry, and innovative package design techniques, producing the lowest possible noise floor. 

The award winning TCS3701 enables front-facing ambient light and proximity sensing measurements in smartphones – maximizing edge-to-edge display screen size – with sensor operation under OLED display.

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