Ebetter 义嘉泰科技 STK3332 环境光传感器

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