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Rohm Semiconductor
RPR-0521RS
Silicon Labs
SI1120
 
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Si1133
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SI1120

Proximity and Ambient Light Sensor with PWM Output

Silicon Labs

The Si1120 is a low-power, reflectance-based proximity and ambient light sensor with advanced analog signal processing and analog PWM output. It includes an integrated differential photodiode, signal processor, and LED driver. Proximity sensing is based on the measurement of reflected light from an external, optically-isolated, strobed LED. A separate visible light photodiode is used for ambient light sensing.

Datasheets:
Features
  • Typically 50cm meter proximity range with single pulse
  • Seven precision optical measurement modes:
    • 3 proximity ranges
    • 3 dc ambient ranges
    • 1 calibration mode
  • Low-noise ambient cancelling circuit allows maximum sensitivity with 8–12 bit resolution
  • ALS works in direct sunlight (100klux)
  • Minimum reflectance sensitivity <1µW/cm²
  • High EMI immunity without shielded packaging
  • Power supply: 2.2–3.7 V
  • Operating temperature range: –40°C to +85°C
  • Typical 10µA current consumption
  • Programmable 400/50mA LED constant current driver output
  • Allows independent LED supply voltage
  • Small outline 3 x 3 mm (ODFN)

Applications:
  • Handsets
  • Touchless switches
  • Occupancy sensors
  • Consumer electronics
  • Notebooks/PCs
  • Industrial automation
  • Display backlighting control
  • Photo-interrupter
Specifications
  • Mounting Type:Surface Mount
  • Operating Temperature:-40°C ~ 85°C
  • Output Type:Analog, PWM, SPI
  • Package / Case:8-VFDFN Exposed Pad
  • Proximity Detection:Yes
  • Supplier Device Package:8-ODFN (3x3)
  • Type:Ambient
  • Voltage - Supply:2.2 V ~ 3.7 V
  • Wavelength:530nm
Parts

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SI1120-A-GMSI1120-A-GMIC PROXIMITY/AMBIENT SEN 8ODFN Ambient530nmYesAnalog, PWM, SPI8-VFDFN Exposed PadRoHS
SI1120-A-GMRSI1120-A-GMRSENS IR PROXIMITY AMB LT 8-ODFN Ambient530nmYesAnalog, PWM, SPI8-VFDFN Exposed PadRoHS

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