STK3321-39A Datasheet | Sensortek

STK3321-39A Ambient Light Sensor and Proximity Sensor with Built-in IR LED Datasheet Version - 1.1 STK3321-39A REV 1.1 1. OVERVIEW Description The STK3321-39A 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 STK3321-39A incorporates a photodiode, timing controller and ADC in a single chip. The excellent spectral response is designed to be close-to human eye. The STK3321-39A is suitable for detecting a wide range of light intensity environment. For proximity sensing, the STK3321-39A also incorporates a photodiode, timing controller and ADC in the same chip. The spectral response of STK3321-39A is optimized for wavelength 940nm infrared light. The STK3321-39A provides programmable duty setting to drive IR LED and employs a noise cancellation scheme to highly reject unwanted ambient IR noise. The STK3321-39A has excellent temperature pensation, robust on-chip refresh rate setting without external ponents. Software shutdown mode control is provided for power saving application. The STK3321-39A operating voltage range is 2.4V to 3.6V. 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 : 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 -...