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TSL2561 Ambient Light Sensor

Light-to-digital converter with I²C interface

 

The TSL2561 is a light-to-digital converter that transforms light intensity to a digital signal output capable of an 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 TSL2561 device supports a traditional level style interrupt that remains asserted until the firmware clears it.

 

Not Recommended for New Designs!

ams does not recommend using the FN PACKAGE VARIANTS of this product for new designs. Please contact your local sales representative for further information regarding available or planned replacement options.

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 or 2mm x 2mm Dual Flat no-lead (FN) 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 40000
Temperature Range [°C] -30 to +70
Packages (6-Pin) CL, FN, 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