BH1749 Color Sensor with 16-Bit Digital Output

By ROHM Semiconductor 402

BH1749 Color Sensor with 16-Bit Digital Output

ROHM’s BH1749NUC is a digital color sensor IC with an I2C bus interface. It detects red, green, blue (RGB) and infrared rays and then converts them to digital values. High sensitivity, wide dynamic range, and excellent IR cut characteristics make it possible to accurately calculate the illuminance and color temperature of ambient light. The BH1749 is ideal for adjusting LCD backlighting in TVs, mobile phones, and tablet PCs, as well as color matching in smartphone cameras.

Block Diagram

  • Built-in IR-cut filter and IR detector
  • Wide detection range: 0.0125 lx to 80 klx
  • Short measurement time (selectable between 35 ms/120 ms/240 ms
  • 50 Hz/60 Hz light noise rejection
  • I2C bus interface (f/s mode support)
  • Two selectable I2C slave addresses
  • Supports 1.8 V logic IF
  • Resolution: 0.0125 lx/count (Typ)
    • In highest gain and longest measurement time setting
  • VCC voltage range: 2.3 V to 3.6 V
  • Illuminance detection range: 80 klx (Typ)
  • Current consumption: 190 µA (Typ)
  • Power down current: 0.8 A (Typ)
  • Measurement time: 35 ms (Typ)
  • Operating temperature range: -40°C to +85°C
  • Package: WSON008X2120 (2.10 mm x 2.00 mm x 0.6 mm)
  • Mobile phones
  • Tablet PCs
  • Note PCs
  • Digital cameras
  • Portable game machines
  • LCD TVs