In modern smart devices, Ambient Light Sensors (ALS) and Proximity Sensors (PS) have become key components for elevating user experience. The STK33562 from Sensortek Technology Corporation is a high-performance sensor that integrates ambient light sensing, proximity sensing, and an infrared LED in a single package. This article walks you through its standout features and broad range of applications.

Product Overview

The STK33562 is a highly integrated optical digital converter with a built-in IR LED and an I²C digital interface. It delivers precise ambient-light measurements for smart backlight and display-brightness control, and it also provides high-accuracy proximity detection with interrupt support—ideal for smartphones, tablets, PDAs, and other mobile devices.

Key Features

Ambient Light Sensor (ALS)

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16-bit digital output for high-precision lux conversion

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Third-generation human-eye spectral response with effective IR suppression

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Programmable integration time and gain control

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Window-comparator interrupts with configurable high/low thresholds

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Clear channel provided for multi-light-source compensation

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Proximity Sensor (PS)

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16-bit resolution with high-sensitivity detection

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Integrated, programmable LED drive current with 11 steps from 3.125 mA to 200 mA

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Multiple interrupt modes; supports Near/Far status detection with flag outputs

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Excellent ambient-light rejection for strong anti-interference performance

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Optimized for 940 nm infrared operation

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General Characteristics

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Wide operating voltage: 1.7 V–2.0 V; I²C interface: 1.7 V–3.6 V

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Low-power design with Standby and Wait modes

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Excellent temperature compensation (−40 °C to +85 °C)

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RoHS/REACH compliant

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OLGA package, only 4 × 1.5 × 1 mm

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Application Areas

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Smartphones and tablets

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Wearables

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Industrial control and automation equipment

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Any scenario requiring smart ambient-light sensing and proximity detection

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Technical Advantages

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High integration: ALS, PS, and IR LED in one chip—saves space and BOM cost

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High accuracy & flexibility: Multiple gain, integration-time, and LED-current options

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Strong anti-interference: Excellent temperature stability and ambient-light suppression

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Easy to develop: Standard I²C interface, flexible register configuration, and versatile interrupt modes

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Contact Shenzhen YJT Technology Co., Ltd. today to learn more about this flagship product we proudly recommend—let’s build a smarter future together!