Description
The TSL2672 family of devices provides proximity detection when coupled with an external IR LED. The devices incorporate a constant-current LED sink driver to pulse the external IR LED and achieve very low average power consumption using the low-power wait state with programmable wait time between proximity measurements. In addition, the devices are register-set and pin-compatible with the TSL2671 series and include a number of new and improved features, such as improved signal-to-noise and measurement accuracy. A proximity offset register allows compensation for optical system crosstalk between the IR LED and the sensor. To prevent false measurements, a proximity saturation bit indicates that the internal analog circuitry saturated. Interrupts have been enhanced with the addition of a sleep-after-interrupt feature that also allows for single-cycle operation.

Features
● Proximity Detection with an Integrated LED Driver in a Single Device
● Register Set- and Pin-Compatible with the TSL2x71 Series
● Proximity Detection
   − Reduced Proximity Count Variation
   − Programmable Offset Control Register
   − Saturation Indicator
   − Programmable Analog Gain and Integration Time
   − Current Sink Driver for External IR LED
   − 16,000:1 Dynamic Range
● Maskable Proximity Interrupt
   − Programmable Upper and Lower Thresholds with Persistence Filter
● Power Management
   − Low Power 2.2 A Sleep State with UserSelectable Sleep-After-Interrupt Mode
   − 90 A Wait State with Programmable Wait Time from 2.7 ms to > 8 seconds
● I2C Fast Mode Compatible Interface
   − Data Rates up to 400 kbit/s
   − Input Voltage Levels Compatible with VDD or 1.8-V Bus
● Small 2 mm  2 mm Dual Flat No-Lead (FN) Package

Applications
● Mobile Handset Touchscreen Control and Automatic Speakerphone Enable
● Mechanical Switch Replacement
● Printer Paper Alignment

End Products and Market Segments
● Mobile Handsets, Tablets, Laptops, and HDTVs
● White Goods
● Toys
● Digital Signage
● Printers