TSL2591 Ambient Light Sensor


Light-to-digital converter from ams transforms light intensity into a digital signal output

The ams TSL2591 is a very-high sensitivity light-to-digital converter that transforms light intensity into a digital signal output capable of direct I²C interface. The device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS integrated circuit. Two integrating ADCs convert the photodiode currents into 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 TSL2591 supports a traditional-level style interrupt that remains asserted until the firmware clears it.

Features
  • Approximates human eye response
    • Dual diode
  • Flexible operation
    • Programmable analog gain and integration time
  • Suited for operation behind dark glass
    • 600 M:1 dynamic range
  • Low-power 3.0 μA sleep state
    • User-selectable sleep mode
  • Low operating overhead
    • Two internal interrupt sources
    • Programmable upper and lower thresholds
    • One interrupt includes programmable persistence filter
  • I²C fast-mode compatible interface
    • Data rates up to 400 kbit/s
    • Input voltage levels compatible with 3.0 V bus

TSL2591 Ambient Light Sensor

Manufacturer Part Number Description Available Quantity Datasheets
TSL25911FN IC LIGHT TO DGTL CONV 6-DFN 3222