NOA2301W Datasheet, PDF (1/19 Pages) ON Semiconductor – Digital Proximity Sensor

NOA2301W
Digital Proximity Sensor
with Interrupt
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.
The proximity sensor measures reflected light intensity with a high
degree of precision and excellent ambient light rejection. The
NOA2301W enables a proximity sensor system with a 16:1
programmable LED drive current range and a 30 dB overall proximity
detection range.
The NOA2301W is ideal for improving the user experience by
enhancing the screen interface with the ability to measure distance for
near/far detection in real time.
www.onsemi.com
AMBIENT LIGHT PROXIMITY SENSOR
Features
• Proximity Sensor and LED Driver in One Device
ORDERING INFORMATION
• Proximity Detection Distance Threshold I²C Programmable with
Device
Wafer Size
Temp Range
12−bit Resolution and Eight Integration Time Ranges (16−bit
effective resolution)
NOA2301W 200 mm wafer −40°C to 80°C
• 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 mA (monitoring I²C interface only, Vdd=3V)
♦ Proximity sensing average operational current 100 mA
♦ Average LED sink current 75 mA
• Programmable interrupt function including independent
• No External Components Required except the IR LED
and Power Supply Decoupling Caps
• These Devices are Pb−Free, Halogen Free/BFR Free
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
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
♦ Standard mode – 100 kHz
♦ Fast mode – 400 kHz
♦ High speed mode – 3.4 MHz
♦ Touch−less switches for light controls
♦ Money detection, coin or paper
♦ Sanitary switches for medical environments
© Semiconductor Components Industries, LLC, 2015
1
March, 2015 − Rev. 0
Publication Order Number:
NOA2301W/D