TSL27403M ams

TSL2740 ALS and Proximity Light-to-Digital Sensor The TSL2740 device features advanced proximity measurement General Description and digital ambient light sensing (ALS). The proximity detection feature provides object detection (e.g. mobile device screen to users ear) by photodiode detection of reflected IR energy. Detect/release events are interrupt driven, and occur when proximity result crosses upper and/or lower threshold settings. The proximity engine features offset adjustment registers to compensate for unwanted IR energy reflection at the sensor. Proximity results are further improved by automatic ambient light subtraction. The ALS sensor features 2 output channels, a visible channel and an IR channel. The visible channel has a photodiode with a UV and IR blocking filter whereas the IR channel has a photodiode with an IR pass filter. Each channel has a dedicated data converter producing a 16-bit output. This architecture allows applications to accurately measure ambient light which enables devices to calculate illuminance to control a display backlight. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of TSL2740, ALS and Proximity Light-to-Digital Sensor are listed below: Figure 1: Added Value of Using TSL2740 Benefits Features 2.0mm x 2.0mm x 0.5mm Single device integrated optical solution Power management features IC fast mode interface compatible Photopic ambient light sense (ALS) Accurate ambient light sensing UV / IR blocking filter Programmable gain and integration time Reduced power consumption 1.8V power supply with 1.8V IC bus Compensates for unwanted IR system crosstalk Programmable proximity offset adjustment reflection register Compensates for unwanted ambient light Proximity automatic ambient light subtraction photodiode current ams Datasheet Page 1 v1-00 2017-Nov-06 Document FeedbackT S L2 740 Gen e ra l De s c rip t ion Applications The TSL2740 applications include: Ambient light sensing Display backlight control Block Diagram The functional blocks of this device are shown below: Figure 2: Functional Blocks of TSL2740 PGND Proximity LED LDR Current Sink Prox ADC Prox Data Prox Control Lower Upper Prox Thresholds SCL Prox Integration Wait Control SDA ALS Thresholds Lower Upper ALS Control VIS ADC VIS Data VIS Ch Interrupt Out / INT Threshold Status IR ADC IR Data IR Ch VDD TSL2740 VSS Page 2 ams Datasheet Document Feedback v1-00 2017-Nov-06 IC Interface