Description
The NOA3301 combines an advanced digital proximity sensor and LED driver with an ambient light sensor (ALS) and tri-mode I2C interface with interrupt capability in an integrated monolithic device. Multiple power management features and very low active sensing power consumption directly address the power requirements of battery operated mobile phones and mobile internet devices.

FEATUREs
• Proximity Sensor, LED driver and ALS in One Device
• Very Low Power Consumption
   ✦ Stand- by Current 5 μA (monitoring I2C interface only,
      VDD = 3 V)
   ✦ ALS Operational Current 50 μA
   ✦ Proximity Sensing Average Operational Current 100 μA
   ✦ Average LED Sink Current 75 μA

Proximity Sensing
• Proximity Detection Distance Threshold I2C Programmable with
   12- bit Resolution and Four integration Time Ranges
   (15- bit effective resolution)
• Effective for Measuring Distances up to 100 mm and
   Beyond
• Excellent IR and Ambient Light Rejection Including
   Sunlight (up to 50k lux) and CFL Interference
• Programmable LED Drive Current from 5 mA to
   160 mA in 5 mA steps, No External Resistor Required

Ambient Light Sensing
• ALS Senses Ambient Light and Provides a 16- bit
   Output Count on the I2C Bus Directly Proportional to
   the Ambient Light Intensity
• Photopic Spectral Response Nearly Matches Human
   Eye
• Dynamic Dark Current Compensation
• Linear Response Over the Full Operating Range
• Senses Intensity of Ambient Light from 0.05 lux to 52k
   lux with 21- bit Effective Resolution (16- bit converter)
• Continuously Programmable Integration Times
   (6.25 ms, 12.5 ms, 25 ms to 800 ms)
• Precision on- Chip Oscillator (counts equal 0.1 lux at
   100 ms integration time)

APPLICATIONs
• Senses human presence in terms of distance and senses
   ambient light conditions, saving display power in
   applications such as:
   ✦ Smart phones, mobile internet devices, MP3 players,
      GPS
   ✦ Mobile device displays and backlit keypads