Description

The STK3410 is an integrated ambient and infrared lightto digital converter with a built-in IR LED and I2Cinterface. This device provides not only ambient lightsensing to allow robust backlight/display brightnesscontrol but also infrared sensing to allow proximityestimation and gesture recognition featured withinterrupt function.For ambient light sensing, the STK3410 incorporates aphotodiode, timing controller and ADC in a single chip.The excellent spectral response is designed to be closeto human eye. The STK3410 is suitable for detecting awide range of light intensity environment. The maximumdetecting light intensity is 1.7K Lux when using defaultsetting.For proximity sensing, the STK3410 also incorporates aphotodiode, timing controller and ADC in the same chip.The spectral response of STK3410 is optimized forwavelength 940nm infrared light. The STK3410 providesprogrammable duty setting to drive IR LED and employsa noise cancellation scheme to highly reject unwantedambient IR noise.For gesture recognition, the STK3410 provides multiphotodiodes to distinguish the movement of the object. Itcan be used to recognize one dimensions gesturerecognition: left / right.The STK3410 has excellent temperature compensation,robust on-chip refresh rate setting without externalcomponents. Software shutdown mode control isprovided for power saving application. The STK3410operating voltage range is 1.7V to 3.6V.

Feature

Integrated ambient light sensor, proximity sensorand 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 cycleoptions– LED current : 12.5 / 25 / 50 / 100 mA
Flexible interrupt setting– Several interrupt modes meet applicationrequirements.– Flag modes are included.– Interrupt persistence : 1 / 4 times
Low noise designAmbient IR noise cancellation– Immunity to 50Hz/60Hz fluorescent lightflicker
940nm LED for STK3410.

Ambient Light Sensor

Convert ambient light intensity to 16-bit digital dataformat
3rd generation ambient light sensor which closes tohuman-eye response and suppress IR portion– Read the Illuminance directly; unlikeconventional solution calculated from twodiodes’ data
Flexible digital settings– Integration time : 0.2ms~6400ms
Flexible interrupt setting– Interrupt while out-of- window– Persistence : 1 / 4 times
Maximum detecting ambient light intensity : 1.7 KLux when using default setting.
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
Package: 3.94x2.36x1.35(mm)
Lead-free package (RoHS compliant)