产品介绍
STK3332
Ambient Light Sensor and Proximity Sensor with Built-in IR LED
1. OVERVIEW
Description
The STK3332 is an integrated ambient and infrared light to digital converter with a built-in IR LED and I2C interface. This device provides not only ambient light sensing to allow robust backlight/display
brightness control but also infrared sensing to allow proximity estimation featured with interrupt function. For ambient light sensing, the STK3332 incorporates a photodiode, timing controller and ADC in a single chip. The excellent spectral response is designed to be close-to human eye. The STK3332 is suitable for detecting a wide range of light intensity environment. For proximity sensing, the TK3332 also incorporates a photodiode, timing controller and ADC in the same chip. The spectral response of STK3332 is optimized for wavelength 940nm infrared light. The STK3332 provides ogrammable current setting to drive IR LED and employs a noise cancellation scheme to highly reject unwanted ambient IR noise. The STK3332 has excellent temperature compensation, robust on-chip refresh rate setting without external components. Software shutdown mode control is provided for power saving application. The STK3332 operating voltage range is 1.7V to 3.0V.
Feature
Integrated ambient light sensor, proximity sensor and infrared LED in one package.
Proximity Sensor
16 bits resolution for proximity detection
Built-in LED driver with flexible setting
– LED turn-on time : 7 steps IT
– LED current : 3.125 / 6.25/ 12.5 / 25 / 50 / 100 /150 mA
Flexible interrupt setting
– Several interrupt modes meet application requirements.
– Flag modes are included.
– Intelligent persistence to speed up the response time : 1/2/4/16 times
Low noise design
High ambient light suppression
940nm LED for STK3332.
Ambient Light Sensor
Convert ambient light intensity to 16-bit digital data format
3rd generation ambient light sensor which closes to human-eye response and suppress IR portion.
Flexible digital settings
– Integration time : 7 steps IT
Flexible interrupt setting
– Interrupt while out-of- window
– Persistence : 1/2/4/8 times
Clear channel for different light source compensation.
General
Fully digital control with I2C interface
– 1.7 ~ 3.6V I2C interface
Low power design
– Standby mode
– Wait mode
VDD wide operation voltage : 1.7~3.0V
Excellent temperature compensation: -40 to 85°C
Available package options: OLGA
– STK3332 : 4 x 1.5 x 1 (mm)
Lead-free package (RoHS compliant)
Moisture Sensitivity Level 3
Applications
Mobile Phone, Smart-phone, PDA
产品替代
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