产品介绍
STK3311-X
Ambient Light Sensor and Proximity Sensor with Built-in IR LED
1. OVERVIEW
Description
The STK3311-X 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 cklight/display brightness control but also infrared sensing to allow proximity estimation featured with interrupt function. For ambient light sensing, the STK3311-X incorporates a photodiode, timing controller and ADC in a single chip. The excellent spectral response is designed to be closeto human eye. The STK3311-X is suitable for detecting a wide range of light intensity environment. For proximity sensing, the STK3311-X also incorporates a photodiode, timing controller and ADC in the same chip. The spectral response of STK3311-X is optimized for wavelength 940nm infrared light. The STK3311-X provides programmable duty setting to drive IR LED and employs a noise cancellation scheme to highly reject unwanted ambient IR noise. The proximity sensor is optimized so that the black card at 0-cm can be detected. Please contact with sensortek for further application solution. The STK3311-X has excellent temperature compensation, robust on-chip refresh rate setting without external components. oftware shutdown mode control is provided for power saving application. The STK3311-X operating voltage range is 1.7V to 3.6V.
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 : 16 steps IT x 64 duty cycle options
– LED current : 12.5 / 25 / 50 / 100 mA
Flexible interrupt setting
– Several interrupt modes meet application requirements.
– Flag modes are included.
– Interrupt persistence : 1 / 4 times
Low noise design
Ambient IR noise cancellation
– Immunity to 50Hz/60Hz fluorescent light flicker
940nm LED for STK3311-X.
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
– Read the Illuminance directly; unlike conventional solution calculated from two diodes’ data
Flexible digital settings
– Integration time : 0.2ms~6400ms
Flexible interrupt setting
– Interrupt while out-of- window
– Persistence : 1 / 4 times
IR sensing mode
General
Fully digital control with I2C interface
– 1.7 ~ 3.6V I2C interface
Low power design
– Standby mode
– Wait mode
Time-multiplexing for sensing
VDD wide operation voltage : 1.7~3.6V
Excellent temperature compensation: -40 to 85°C
Available package options: OLGA
– STK3311-X : 3.94x2.36x1.35(mm)
Lead-free package (RoHS compliant)
Applications
Mobile Phone, Smart-phone, PDA
产品替代
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