Onsemi NOA1305CUTAG | Demoboard ALS-GEVB

Description

The NOA1305 ambient light sensor (ALS) is designed for handheldapplications and integrates a 16−bit ADC, a 2−wire I2C digitalinterface, internal clock oscillator and a power down mode. The builtin dynamic dark current compensation and precision calibrationcapability coupled with excellent IR and 50/60 Hz flicker rejectionenables highly accurate measurements from very low light levels tofull sunlight. The device can support simple count equals lux readingsin interrupt−driven or polling modes. The NOA1305 employs proprietaryCMOS image sensing technology from ON Semiconductor to providelarge signal to noise ratio (SNR) and wide dynamic range (DR) overthe entire operating temperature range. The optical filter used with thischip provides a light response similar to that of the human eye.

Features

Senses Ambient Light and Provides an Output Count Proportional tothe Ambient Light Intensity

• Photopic Spectral Response
• Dynamic Dark Current Compensation
• IR Rejection Eliminates Need for Additional IR Photodiode
• Less than 120 A Active Power Consumption in Normal Operation
• Less than 2 A 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

Typical applications

• Cell Phones, PDAs, MP3 Players, GPS / Cameras, Video Recorders / Mobile Devices with Displays or Backlit Keypads

More information

• IC product information