STK3321 Datasheet | Sensortek

STK3321 Ambient Light Sensor and Proximity Sensor with Built-in IR LED Preliminary Datasheet Version - 0.9 STK3321 REV 0.9 1. OVERVIEW Description The STK3321 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 incorporates a photodiode, timing controller and ADC in a single chip. The excellent spectral response is designed to be closeto human eye. The STK3321 is suitable for detecting a wide range of light intensity environment. For proximity sensing, the STK3321 also incorporates a photodiode, timing controller and ADC in the same chip. The spectral response of STK3321 is optimized for wavelength 940nm infrared light. The STK3321 provides programmable duty setting to drive IR LED and employs a noise cancellation scheme to highly reject unwanted ambient IR noise. The STK3321 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 operating voltage range is 1.7V 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 - Standby mode - Wait mode -...