NOA2301W数据手册ONSEMI中文资料规格书

描述 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.

特性 Features

Proximity Sensor and LED Driver in One Device
Proximity Detection Distance Threshold I2C Programmable with12−bit Resolution and Eight Integration Time Ranges (16−biteffective resolution)
Effective for Measuring Distances up to 200 mm and Beyond
Excellent IR and Ambient Light Rejection including Sunlight (up to50K lux) and CFL Interference
Programmable LED Drive Current from 10 mA to 160 mA in 5 mASteps, No External Resistor Required
User Programmable LED Pulse Frequency
Very Low Power Consumption♦ Stand−by current 2.8 \u0002A (monitoring I2C interface only, Vdd=3V)♦ Proximity sensing average operational current 100 \u0002A♦ Average LED sink current 75 \u0002A
Programmable interrupt function including independentupper and lower threshold detection or threshold basedhysteresis
Level or Edge Triggered Interrupts
Proximity persistence feature reduces interrupts byproviding hysteresis to filter fast transients such ascamera flash
Automatic power down after single measurement orcontinuous measurements with programmable intervaltime
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 LEDand Power Supply Decoupling Caps
These Devices are Pb−Free, Halogen Free/BFR Freeand are RoHS Compliant

应用 Application

Senses human presence in terms of distance for savingdisplay power and preventing inadvertent commandinitiation 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 playersContactless Switches♦ Touch−less switches for light controls♦ Money detection, coin or paper♦ Sanitary switches for medical environments
Smart phones, mobile internet devices, MP3 players, GPSMobile device displays and backlit keypadsCamerasGame controllers, media playerscontactless switches