Si1145

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...