ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)


Digital proximity detector, LED drvr., 1.8v I2C interface


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 Features

  • Patented dual-diode architecture
  • 2M:1 dynamic range 
  • Programmable LED drive current
  • Programmable interrupt function
  • Area efficient 2mm x 2mm Dual Flat no-lead (FN) package

Key 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

Product Facts

Supply Voltage [V] 2.6 - 3.6
I²C Bus 1,8
Programmable Gain, Integration Time, Interrupt
Integrated Capabilities and Components
Recommended Operating Distances < 46 cm

Temperature Range [°C] -40 to 85
Packages FN, Pin Count 8

Additional Information

  • Touchscreen control
  • Notebook and Monitor Security
  • Industrial process control
  • Printer paper alignment and detection
  • Optical Switch