描述 Description

The TSL2671 family of devices provides a complete proximity detection system and digital interface logic in a single 6-pin package. The device includes a digital proximity sensor with integrated LED driver for the required external IR LED. The proximity function offers a wide range of performance, with four programmable LED drive currents and a pulse repetition range of 1 to 32 pulses. The proximity detection circuitry compensates for ambient light, allowing it to operate in environments ranging from bright sunlight to dark rooms. This wide dynamic range also allows operation in short-distance detection applications behind dark glass, such as cell phones. An internal state machine provides the ability to put the device into a low-power mode for very low average power consumption.

特性 Features

● Proximity Detection with an Integrated LED Driver in a Single Device

● Proximity Detection

? Programmable Number of IR Pulses

? Programmable Current Sink for the IR

LED — No Limiting Resistor Needed

? Programmable Interrupt Function with

Upper and Lower Threshold

? Covers a 2000:1 Dynamic Range

● Programmable Wait Timer

? Programmable from 2.72 ms

to > 8 Seconds

? Wait State — 65 A Typical Current

● I2C Interface Compatible

? Up to 400 kHz (I2C Fast Mode)

? Dedicated Interrupt Pin

● Small 2 mm 2 mm ODFN Package

● Sleep Mode — 2.5 A Typical Current

Applications

● Cell Phone Touch Screen Disable

● Notebook/Monitor Security

● Automatic Speakerphone Enable

● Automatic Menu Popup