SI1120 - Silicon Laboratories

SI1120 PROXIMITY/AMBIENT LIGHT SENSOR

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 visib.

Features

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