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TSL2569 Ambient Light Sensor

Light-to-digital converter with I2C interface

Features

  • 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

Benefits

  • 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
Datasheet Document version 1-00 English
Application Note Optical Window Design (DN13B) English
Application Note Radiometric and Photometric Measurements (DN21) English
Application Note Sensitivity to Wavelength (DN23) English
Application Note Sensitivity to Temperature (DN24) English
Application Note Using the Lux Equation (DN29A) English
Application Note Auto-gain Algorithm (DN39) English
Application Note Ambient Light Sensing (DN26) English
Application Note Custom Lux Equation (DN28) English
Application Note Improving Color Sensor Lux Accuracy English
Application Note TSL258x: Accurate ADC Readings after Enable (DN42) English

Other Information

Type Description Language
Block Diagram TSL2569 Block Diagram English

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