NOA1302 Datasheet, PDF (1/9 Pages) ON Semiconductor – Ambient Light Sensor with I2C Interface

NOA1302
Ambient Light Sensor with
I²C Interface
Description
The NOA1302 integrates a wide dynamic range ambient light
sensor (ALS) with a 16−bit ADC and a 2−wire I²C digital interface.
The NOA1302 ambient light sensor provides a linear response over
the range of close to 0 lux to well over 100,000 lux with programmable
integration times to optimize noise performance. The sensor employs
proprietary CMOS image sensing technology from ON Semiconductor
which provides low noise and high dynamic range output signals and
light response similar to the response of the human eye.
The NOA1302 operates as an I²C slave device and supports
commands to set options in the device and read out the ambient light
intensity count.
Features
• Senses Ambient Light and Provides an Output Count Proportional to
the Ambient Light Intensity
• Human Eye Type of Spectral Response
• Provides Comfortable Levels of Display Depending on the Viewing
Environment
• Linear Response Over the Full Operating Range
• Senses Intensity of Ambient Light from ~0 Lux to over 100,000 Lux
• Programmable Integration Times of 400 ms, 200 ms and 100 ms
• No External Components Required
• Low Power Consumption
• Built−in 16−bit ADC
• I²C Serial Communication Port − Standard Mode – 100 kHz
− Fast Mode – 400 kHz
• This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
Applications
• Saves Display Power in Applications such as:
− Laptops, Notebooks, Digital Signage
− LCD TVs and Monitors, Digital Picture Frames
− LED Indoor/Outdoor Residential and Street Lights
http://onsemi.com
CTSSOP−8
DC SUFFIX
CASE 949AA
MARKING DIAGRAM
8
ÉÉÉɹ³⁰²
AYWG
1
1302= Specific Device Code
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
PIN ASSIGNMENT
ÉÉÉÉ ¹
NC
NC
VSS
8
NC
NC
VDD
SCL
SDA
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
hv
6 _VDD
C1
C2 _{3 VSS}
10m _0.1m
Vin = 3.3 V
R1
R2
1k
1k
SDA ⁵
SCL ⁴
IC1
NOA1302
SDA
MCU
SCL
C_L not to exceed 250 pF
including all parasitic
capacitances
Figure 1. Typical Application Circuit
© Semiconductor Components Industries, LLC, 2009
1
August, 2009 − Rev. 1
Publication Order Number:
NOA1302/D