NOA1305 Datasheet, PDF (1/13 Pages) ON Semiconductor – Ambient Light Sensor

NOA1305
Ambient Light Sensor with
I²C 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 I²C 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
• 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
• I²C Serial Communication Port Supports Standard and Fast Modes
• Metal Mask Programmable I²C Slave Address Option Available
• These Devices are Pb−Free and are RoHS Compliant
Applications
• Saves Display Power In Applications Such As:
♦ Cell Phones, PDAs, MP3 Players, GPS
♦ Cameras, Video Recorders
♦ Mobile Devices with Displays or Backlit Keypads
http://onsemi.com
CUDFN6
CU SUFFIX
CASE 505AD
PIN ASSIGNMENT
1
VSS
2
NC
3
SCL
6
VDD
5
INT
4
SDA
(Top View)
ORDERING INFORMATION
Device
Package
Shipping^†
NOA1305CUTAG CUDFN6
(Pb−Free)
2500 / Tape &
Reel
Temperature Range
−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.
© Semiconductor Components Industries, LLC, 2012
1
October, 2012 − Rev. 0
Publication Order Number:
NOA1305/D