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

TSL26721

Digital proximity detector, LED drvr., Vdd I2C interface

 

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.

Key Features

  • Patented dual-diode architecture
  • Programmable proximity offset adjustment
  • Proximity saturation indicator bit
  • Programmable LED drive current

Key Benefits

  • Enables operation in IR light environments
  • Eliminates IR LED system cross talk
  • Prevents false proximity detection in bright light
  • Allows multiple power-level selection without external passives

Product Facts

Supply Voltage [V] 2.4 - 3.6
I²C Bus VDD
Programmable Gain, Integration Time, Interrupt
Integrated Capabilities and Components
Recommended Operating Distances < 15 cm, < 46 cm
Temperature Range [°C] -30 to 70
Packages FN, Pin Count 6

Additional Information

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