NOA1312 Datasheet, PDF (1/16 Pages) ON Semiconductor – High-Precision Ambient Light Sensor

NOA1312
Product Preview
High-Precision Ambient
Light Sensor with Three I²C
Slave Addresses, EEPROM
and Dark Current
Compensation
Description
The NOA1312 high−precision ambient light sensor (ALS) is
designed for very high accuracy (better than ±5% tolerance) handheld
applications. The device integrates a 16−bit ADC, a 2−wire I²C digital
interface with three pin−selectable I²C slave addresses, internal clock
oscillator, EEPROM and a power down mode. A photopic optical color
filter together with built in dynamic dark current compensation and
precision calibration capability plus 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 NOA1312
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.
Features
• Senses Ambient Light and Provides an Output Count Proportional to
the Ambient Light Intensity
• Human Eye Spectral Response using Photopic Optical Filter
• Dynamic Dark Current Compensation
• Very High Accuracy (better than ±5% tolerance)
• Ev Sensitivity of 5.2 Counts/lux
• Three I²C Slave Addresses (0x29, 0x39 and 0x49), Pin Selectable
• Less than 240 mA Active Power Consumption in Normal Operation
• Ultra−low Quiescent Power Dissipation, less than 100 nA in Power
Down Mode (below 50°C)
• Interrupt Signal Notifies Host of Significant Intensity Changes
• Internal EEPROM Stores Values to Minimize Programming Time
• Register Values Preserved during Power−down Mode
• 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 0.096 lux to Full Sunlight
• Programmable Integration Times
• No External Components Required
• Built−in 16−bit ADC
• I²C Serial Communication Port Supports Standard and Fast Modes
• This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
http://onsemi.com
CUDFN6
CU SUFFIX
CASE 505AD
PIN ASSIGNMENT
VSS
1
VDD
INT
AD
SCL
SDA
(Top View)
ORDERING INFORMATION
Device
NOA1312CUTAG
Package
CUDFN6
(Pb−Free)
Shipping^†
2500 / Tape &
Reel
†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.
Applications
• Saves Display Power in Applications such as:
− Tablets, LED Backlit Displays,
Smart Phones, Netbooks, PDAs,
MP3 Players, GPS
− Video Recorders
© Semiconductor Components Industries, LLC, 2011
1
November, 2011 − Rev. P0
Publication Order Number:
NOA1312/D