TSL2591 Ambient Light Sensor

By ams 69

TSL2591 Ambient Light Sensor

ams' Offering a wide 600M:1 dynamic range of up to 88,000 lux (bright sunlight), ams' TSL2591 device family increases design flexibility and offers engineers new levels of performance in ambient light sensors for displays, as well as for a wide range of non-display applications.

The 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 luminance (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.

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

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