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NOA1305

Description
Ambient Light Sensor
File Size277KB,13 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
Download Datasheet View All

NOA1305 Overview

Ambient Light Sensor

NOA1305
Ambient Light Sensor with
I
2
C Interface and Dark
Current Compensation
Description
The NOA1305 ambient light sensor (ALS) is designed for handheld
applications and integrates a 16−bit ADC, a 2−wire I
2
C digital
interface, internal clock oscillator and a power down mode. The built
in dynamic dark current compensation and precision calibration
capability coupled with excellent IR and 50/60 Hz flicker rejection
enables highly accurate measurements from very low light levels to
full sunlight. The device can support simple count equals lux readings
in interrupt−driven or polling modes. The NOA1305 employs proprietary
CMOS image sensing technology from ON Semiconductor to provide
large signal to noise ratio (SNR) and wide dynamic range (DR) over
the entire operating temperature range. The optical filter used with this
chip provides a light response similar to that of the human eye.
Features
http://onsemi.com
CUDFN6
CU SUFFIX
CASE 505AD
PIN ASSIGNMENT
VSS
NC
SCL
1
2
3
(Top View)
6
5
4
VDD
INT
SDA
Senses Ambient Light and Provides an Output Count Proportional to
the Ambient Light Intensity
Photopic Spectral Response
Dynamic Dark Current Compensation
IR Rejection Eliminates Need for Additional IR Photodiode
Less than 120
mA
Active Power Consumption in Normal Operation
Less than 2
mA
Power Dissipation in Power Down Mode
Interrupt Signal Notifies Host of Significant Intensity Changes
Wide Operating Voltage Range (2.4 V to 3.6 V)
Wide Operating Temperature Range (−40°C to 85°C)
Linear Response Over the Full Operating Range
Senses Intensity of Ambient Light from 0.165 Lux to Over 100K Lux
8 Selectable Integration Times Ranging from 6.25 ms to 800 ms
No External Components Required
Built−in 16−bit ADC
I
2
C Serial Communication Port Supports Standard and Fast Modes
Metal Mask Programmable I
2
C Slave Address Option Available
These Devices are Pb−Free and are RoHS Compliant
ORDERING INFORMATION
Device
NOA1305CUTAG
Package
CUDFN6
(Pb−Free)
−40°C
to 85°C
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
Shipping
2500 / Tape &
Reel
Temperature Range
Applications
Saves Display Power In Applications Such As:
Cell Phones, PDAs, MP3 Players, GPS
Cameras, Video Recorders
Mobile Devices with Displays or Backlit Keypads
©
Semiconductor Components Industries, LLC, 2012
October, 2012
Rev. 0
1
Publication Order Number:
NOA1305/D
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