Si1146
Description
Valve controls - Smoke detectors - Touchless switches - Touchless sliders - Occupancy sensors - Consumer electronics - Industrial automation - Display backlighting control - Photo-interrupters The Si1145/46/47 is a low-power, reflectance-based, infrared proximity, ultraviolet (UV) index, and ambient light sensor with I2C digital interface and programmableevent interrupt output. This touchless sensor IC includes an analog-to-digital converter, integrated high-sensitivity visible and infrared photodiodes, digital signal processor, and one, two, or three integrated infrared LED drivers with fifteen selectable drive levels.
Key Features
- Integrated infrared proximity detector
- Integrated UV index sensor
- Proximity detection adjustable from
- Industry's lowest power consumption under 1 cm to over 50 cm
- 1.71 to 3.6 V supply voltage
- Three independent LED drivers
- 9 µA average current (LED pulsed
- 15 current settings from 5.6 mA to 25.6 µs every 800 ms at 180 mA 360 mA for each LED driver plus 3 µA Si114x supply)
- 25.6 µs LED driver pulse width
- < 500 nA standby current
