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TSL27713 Ambient Light Sensor

Light-to-digital converter with proximity sensing, I2C Vbus = 1.8V interface


The TSL2771 family of devices provides both ambient light sensing (ALS) and proximity detection (when coupled with an external IR LED). The ALS approximates human eye response to light intensity under a variety of lighting conditions and through a variety of attenuation materials. The proximity detection feature allows a large dynamic range of operation for use in short distance detection behind dark glass such as in a cell phone or for longer distance measurements for applications such as presence detection for monitors or laptops. The programmable proximity detection enables continuous measurements across the entire range. In addition, an internal state machine provides the ability to put the device into a low power mode in between ALS and proximity measurements providing very low average power consumption.

Key Features

  • Ambient Light Sensing and Proximity Detection in a Single Device
  • Ambient Light Sensing (ALS)
    • Approximates Human Eye Response
    • Programmable Analog Gain
    • Programmable Integration Time
    • Programmable Interrupt Function with Upper and Lower Threshold
    • Resolution Up to 16 Bits
    • Very High Sensitivity — Operates Well Behind Darkened Glass
    • Up to 1,000,000:1 Dynamic Range
  • Proximity Detection
    • Programmable Number of IR Pulses
    • Programmable Current Sink for the IR LED — No Limiting Resistor Needed
    • Programmable Interrupt Function with Upper and Lower Threshold
    • Covers a 2000:1 Dynamic Range
  • Programmable Wait Timer
    • Programmable from 2.72 ms to > 8 Seconds
    • Wait State — 65 µA Typical Current

Product Facts

Supply Voltage [V] 2.6 - 3.6
I²C Bus 1,8
Programmable Gain, Integration Time, Interrupt
Integrated Capabilities ALS, Prox, LED Drvr.
Recommended Operating Distances < 46 cm
Temperature Range [°C] -40 to 85
Packages FN, Pin Count 6