LITE-ON Light and Proximity Sensor LTR-553ALS-WA/LTR-556ALS-WA(I2C)

From Visuino
Jump to navigation Jump to search

File:TArduinoLTR553ALS.png

Summary

Integrated I2C ambient light and proximity sensor with dual photodiodes for visible+IR and IR-only measurement, featuring programmable LED for proximity detection.

Description

The LTR-553ALS-WA/LTR-556ALS-WA component combines ambient light sensing (ALS) and proximity detection in a single package. It features separate photodiodes for visible+IR and IR-only light measurement, programmable integration time, and adjustable measurement ranges up to 64,000 lux. The proximity sensor includes configurable LED current, pulse frequency, and duty cycle for accurate object detection up to several centimeters. Typical applications include display dimming, presence detection, and automatic lighting control systems.

Diagram:

Properties

  • Address – I2C device address (Default: 0x23).
  • Interrupt:
    • Active Low – Interrupt pin polarity (Default: True).
    • Light:
      • Count Ignored – Number of out-of-range readings before interrupt (Default: 0).
      • Enabled – Enables light sensor interrupts (Default: False).
      • Max – Upper threshold for light interrupt (Default: 1 lux).
      • Min – Lower threshold for light interrupt (Default: 0 lux).
    • Proximity:
      • Count Ignored – Number of out-of-range readings before interrupt (Default: 0).
      • Enabled – Enables proximity sensor interrupts (Default: False).
      • Max – Upper threshold for proximity interrupt (Default: 1).
      • Min – Lower threshold for proximity interrupt (Default: 0).
  • Light:
    • Enabled – Enables ambient light sensor (Default: True).
    • Integration Time – Light measurement integration period in ms (Default: 100ms).
    • Range – Maximum measurable light intensity (Default: 64000 lux).
    • Repeat Period – Time between light measurements (Default: 500ms).
    • Standby – Puts light sensor in low-power mode (Default: False).
  • Proximity:
    • Enabled – Enables proximity sensor (Default: True).
    • Gain – Proximity sensor amplification factor (Default: 16x).
    • LED:
      • Current – Infrared LED drive current (Default: 100mA).
      • Duty Cycle – LED pulse duty cycle (Default: 100%).
      • Enabled – Enables proximity LED (Default: True).
      • Frequency – LED pulse frequency (Default: 60kHz).
      • Number Pulses – LED pulses per measurement (Default: 1).
    • Offset – Proximity measurement offset correction (Default: 0).
    • Repeat Period – Time between proximity measurements (Default: 100ms).
  • Saturation:
    • Enabled – Enables saturation detection (Default: True).
  • Standby – Global low-power mode (Default: False).
  • Name – Component identifier (Default: LTR553ALS).

Pins

Input Pins

  • SDA (i2c) – I2C data line communication.
  • SCL (i2c) – I2C clock line communication.
  • INT (digital) – Interrupt signal input (active low).

Output Pins

  • Light Out (analog) – Combined visible+IR light intensity measurement in lux (Range: 0-64000 lux).
  • IR Out (analog) – IR-only light intensity measurement in lux (Range: 0-64000 lux).
  • Proximity Out (analog) – Proximity measurement value (unitless, higher values indicate closer objects).
  • Saturation (digital) – Saturation detection output (high when sensor is saturated).

Categories

Retrieved from "https://visuino.com/wiki/index.php?title=LITE-ON_Light_and_Proximity_Sensor_LTR-553ALS-WA/LTR-556ALS-WA(I2C)&oldid=6710"