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ams OSRAM TSL2584TSV Light-to-Digital Converter

ams OSRAM TSL2584TSV Light-to-Digital Converter is offered as a 1.145mm x 1.66mm digital device in a through-silicon via (TSV) package for next-generation thinner wearable products. This high sensitivity light-to-digital converter transforms light intensity into a digital signal output capable of direct I²C interface. 

TSL2584TSV integrates one broadband photodiode (visible plus infrared), one infrared-responding photodiode, and a photopic infrared-blocking filter on a single CMOS integrated circuit. The integrated on-chip interference filter rejects IR producing a near-photopic response. TSL2584TSV's two integrating analog-to-digital converters (ADCs) convert the photodiode currents into a digital output that represents the irradiance measured on each channel. This digital output is passed to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response. TSL2584TSV's near-photopic response produces a highly accurate lux measurement even when mounted behind dark glass.

The TSL2584TSV also supports an interrupt feature designed to simplify and improve system efficiency by eliminating the need to poll a sensor for a light intensity value.

Features

  • Dual diode with photopic filter design approximates human eye response
  • Programmable analog gain and integration time for flexible operation
  • 1,000,000: 1 Dynamic Range; suited for operation behind dark glass
  • Low operating overhead
    • Programmable upper and lower thresholds
    • Programmable persistence filter
  • Low power operation with a 3.0μA sleep state
  • Industry standard two-wire interface
    • I²C fast mode compatible interface
      • Data rates up to 400kbit/s
      • Input voltage levels compatible with 1.8V bus
  • Ultra-small footprint
    • 1.145mm x 1.660mm TSV (Through Silicon Via)
    • 0.218mm height w/o solder balls
  • MSL1 rated with unlimited manufacturing floor life

Applications

  • Thinner wearable products
  • Display Backlight Control
  • Keyboard Illumination Control
  • Printer Paper Detection
  • Medical Diagnostics

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Published: 2015-12-01 | Updated: 2023-04-24