PROXIMITY/UV/AMBIENT LIGHT SENSOR - Silicon Laboratories
Description
Si1145/46/47
PROXIMITY/UV/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE
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
50 cm proximity range with single
Internal and external wake support
pulse (<3 klx)
Built-in voltage supply monitor and
15 cm proximity range with single
power-on reset controller
pulse (>3 klx)
25.
6 µs LED “on” time keeps total
Operates at up to 128 klx (direct
power consumption duty cycle low
sunlight)
without compromising performance
High reflectance sensitivity
or noise immunity
< 1 µW/cm2
I2C Serial communications
High EMI immunity without shielded Up to 3.
4 Mbps data rate
packaging
Slave mode hardware address
Integrated ambient light sensor
decoding
100 mlx resolution possible,
Small-outline 10-lead 2x2 mm QFN
allowing operation under dark glass Temperature Range
1 to 128 klx dynamic range possible –40 to +85 °C
across two ADC range settings
Accurate lux measurements with IR
correction algorithm
Applications
Handsets E-book readers Notebooks/Netbooks Portable consumer electronics Audio products Security panels Tamper detection circuits Dispensers
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...
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