ams OSRAM TCS3408 Color Sensor

ams OSRAM TCS3408 Color Sensor is an ultra-high sensitivity light-to-digital converter with Ambient Light Sensing (ALS), color (RGB) sensing, and selective flicker detection. The ambient light and color sensing functions provide 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 engine's architecture features a self-maximizing dynamic range, ambient light subtraction, data output, and an interrupt-driven 1.8V I2C communications interface.

The TCS3408 integrates direct detection of 50Hz or 60Hz ambient light flicker. Flicker detection is executed in parallel with ambient light and color sensing with independent gain configuration. Also, it suppresses cross-coupling from any 940nm IR if generated by adjacent circuits, such as a Time-of-Flight sensor. The flicker detection engine can also buffer data for calculating other flicker frequencies externally.


  • Invisible ALS and color sensing under any glass type
    • Configurable, high sensitivity
      • Programmable gain and integration time
      • 2048x dynamic range by gain adjustment only
      • 1mlux minimum detectable illuminance (100ms)
    • Tailored ALS and color response
      • UV/IR blocking filter for RGBC channels
      • Wideband reference channel without filters
    • ALS/color interrupt with thresholds
  • Unique fast ALS integration mode that provides flicker-immune ALS sensing within 10ms
  • 4096x dynamic range
  • Improved RGBC and doubling of flicker gain (2048x)
  • Improved UV/IR-rejection filter
  • 0.18µm process technology with 1.8V I2C
  • Enables accurate stable measurement behind inked materials
  • Enables dark room to sunlight operation
  • Minimizes camera flicker effect in 50/60Hz light-source environments
  • Independently configurable timing and gain
  • Flicker detected interrupt
  • Configurable sleep mode
  • 3x flicker sensitivity enables the detection of low and high-frequency light flickering
  • Improves lux accuracy and CCT measurements
  • Reduces power consumption in battery-powered applications
  • Interrupt-driven device


  • Cameras
  • Smartphones
  • Tablet
  • Display backlight control


  • 1.7V to 2.0V supply voltage range
  • 3.3V typical external LED anode supply
  • 280μA maximum ALS supply current, 196μA typical
  • 60μA maximum idle current, 40μA typical
  • 5μA maximum sleep current, 0.7μA typical
  • ±5μA leakage current
  • 10pF input pin capacitance
  • 300ns maximum clock/data rise/fall time
  • 700kHz to 740kHz oscillator frequency range
  • 1.35μs to 1.43μs oscillator clock cycle range
  • I2C, 1.8V interface
  • 5x color sensor channels
  • IR blocking filter
  • Programmable gain, integration time, and interrupt
  • -30°C to +85°C operating temperature range
  • ±2000V HBM ESD per JEDEC/ESDA JS-001-2014
  • QFN-12 package type

Block Diagram

Block Diagram - ams OSRAM TCS3408 Color Sensor
Publicado: 2019-11-13 | Actualizado: 2023-07-11