PROXIMITY/UV/AMBIENT LIGHT SENSOR
Si1145/46/47
PROXIMITY/UV/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE
Features
Integrated infrared proximity detecto...
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...
Similar Datasheet