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TSL2569 Ambient Light Sensor

Light-to-digital converter with I2C interface


  • Patented dual-diode architecture
  • 1M:1 dynamic range
  • Programmable interrupt function
  • I²C digital interface
  • Available in 1.25mm x 1.75mm chip-scale or 2.6mm x 3.8mm TMB packages


  • Enables operation in IR light environments
  • Enables dark room to high lux sunlight operation
  • Reduces microprocessor interrupt overhead
  • Digital interface is less susceptible to noise
  • Reduces board space requirements while simplifying designs

Product parameters

Supply Voltage [V] 2.7 - 3.6
I2C Bus I2C - VDD
Programmable Gain, Integration time, Interrupt
Max. Lux [lux] 10000
Temperature Range [°C] -30 to 70
Packages (6-Pin) CS, T
Remark Not recommended for new designs. Please see TSL2572x device family.

General Description

The TSL2569 is a low-voltage, light-to-digital converter that transforms light intensity to a digital signal output capable of direct I2C interface. Each device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS integrated circuit capable of providing a near photopic response over an effective 20-bit dynamic range (16-bit resolution). Two integrating ADCs convert the photodiode currents to a digital output that represents the irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response. The TSL2569 device supports a traditional level style interrupt that remains asserted until the firmware clears it.

This product suits for the following applications:

  • Display backlight control
  • Keyboard illumination control
  • Solid state and general lighting control
  • Printer paper detection

Technical Documents

Type Description Language
Application Note TSL258x: Accurate ADC Readings after Enable (DN42) English
Application Note Colorimetry Tutorial (DN 20) English
Block Diagram TSL2569 Block Diagram English
Datasheet Document version 1-00 English

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