TSL26711FN

General 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.

Key Benefits & Features

The benefits and features of TSL2671, Digital Proximity Detector are listed below:

Features

• Patented Dual-Diode Architecture
• 2000:1 Dynamic Range
• Programmable LED Drive Current
• Programmable Interrupt Function
• Area Efficient 2mm x 2mm Dual Flat No-Lead (FN) Package
• 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 — 65μA 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 μA Typical Current

Benefits

• Enables Operation in IR Light Environments
• Enables Operation in High Lux Sunlight and Accurate Sensing Behind Spectrally Distorting Materials
• Allows Multiple Power-Level Selection without External Passives
• Reduces Micro-Processor Interrupt Overhead
• Reduces Board Space Requirements while Simplifying Designs

Applications

TSL2671, Digital Proximity Detector is ideal for:
• Cell Phone Touch Screen Disable
• Notebook/Monitor Security
• Automatic Speakerphone Enable
• Automatic Menu Popup