Description
The NOA2301W combines an advanced digital proximity sensor and LED driver coupled with a 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 and LED Driver in One Device
• Proximity Detection Distance Threshold I2C Programmable with
   12−bit Resolution and Eight Integration Time Ranges (16−bit
   effective resolution)
• Effective for Measuring Distances up to 200 mm and Beyond
• Excellent IR and Ambient Light Rejection including Sunlight (up to
   50K lux) and CFL Interference
• Programmable LED Drive Current from 10 mA to 160 mA in 5 mA
   Steps, No External Resistor Required
• User Programmable LED Pulse Frequency
• Very Low Power Consumption
   ♦ Stand−by current 2.8 μA (monitoring I2C interface only, Vdd=3V)
   ♦ Proximity sensing average operational current 100 μA
   ♦ Average LED sink current 75 μA
• Programmable interrupt function including independent
   upper and lower threshold detection or threshold based
   hysteresis
• Level or Edge Triggered Interrupts
• Proximity persistence feature reduces interrupts by
   providing hysteresis to filter fast transients such as
   camera flash
• Automatic power down after single measurement or
   continuous measurements with programmable interval
   time
• Wide Operating Voltage Range (2.3 V to 3.6 V)
• Wide Operating Temperature Range (−40°C to 80°C)
• I2C Serial Communication Port
   ♦ Standard mode – 100 kHz
   ♦ Fast mode – 400 kHz
   ♦ High speed mode – 3.4 MHz
• No External Components Required except the IR LED
   and Power Supply Decoupling Caps
• These Devices are Pb−Free, Halogen Free/BFR Free
   and are RoHS Compliant

APPLICATIONs
• Senses human presence in terms of distance for saving
   display power and preventing inadvertent command
   initiation in applications such as:
   ♦ Smart phones, mobile internet devices, MP3 players,
      GPS
   ♦ Mobile device displays and backlit keypads
   ♦ Headphone use detection
   ♦ Cameras
   ♦ Game controllers, media players
• Contactless Switches
   ♦ Touch−less switches for light controls
   ♦ Money detection, coin or paper
   ♦ Sanitary switches for medical environments