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TSL2581 Ambient Light Sensor

Light-to-digital converter with Vdd I2C interface

 

The TSL2581 is a very-high sensitivity 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 16-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 TSL2581 device permits an I2C-Alert style interrupt, 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
  • I2C digital interface
  • 3µA Quiescent Current
  • Available in 1.25mm x 1.75mm Chipscale 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
  • Digital interface is less susceptible to noise
  • Enables low standby power consumption 
  • 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 FN, CS (6-Pin)
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