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TSL2569 Ambient Light Sensor

Light-to-digital converter with I²C interface

 

The TSL2569 is a low-voltage, light-to-digital converter that transforms light intensity to a digital signal output capable of a 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.

Key Features

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

Key Benefits

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

Product Facts

Supply Voltage [V] 2.7 - 3.6
Interface I²C - Vdd
Programmable Gain, Integration Time , Interrupt
Maximum Lux 10000
Temperature Range [°C] -30 to +70
Packages (6-Pin) CS, T
Remark Not recommended for new designs. Please see TSL2571x device family.

Additional Information

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