Azoteq IQS620A ProxFusion Sensor IC

Azoteq IQS620A ProxFusion® Sensor IC integrates multiple sensor technologies onto a single chip. The IQS620A offers dual direction Hall-effect sensing, along with capacitive touch sensing, and two-level inductive sensing. The IQS620A is designed for applications where any or all of these technologies may be required. The IQS620A is an ultra-low-power solution designed for short or long-term activations through any of the sensing channels. The IQS620A sensor is fully I2C compatible and can be configured to output main trigger events on GPIOs.

By combining multiple sensors onto a single sensor IC, the IQS620A ProxFusion Sensor IC allows developers to reduce the bill of materials, power consumption, and board space required for an application. The IQS620A is available in a compact 3mm x 3mm DFN-10 and 1.07mm x 1.53mm WLCSP-9 packages.


  • Unique combination of sensing technologies
    • Capacitive sensing
      • Full auto-tuning with adjustable sensitivity
      • 2pF to 200pF external capacitive load capability
    • Hall-effect sensing
      • On-chip Hall-effect measurement plates
      • Dual direction Hall switch sensor UI
      • 2 level detection (widely variable)
      • Detection range 10mT – 200mT
    • Inductive sensing
      • 2 level detection and hysteresis for inductive sensing
      • Only external sense coil required (PCB trace)
  • Low power consumption
    • 90μA (100Hz response, 3-channel capacitive)
    • 32μA (20Hz response, 3-channel capacitive)
    • 2.5μA (4Hz response, 1-channel capacitive wake-up)
  • Multiple integrated UI options based on years of experience in sensing on fixed and mobile platforms:
    • Proximity wake-up/Touch
    • SAR
  • Automatic Tuning Implementation (ATI) – performance enhancement (10bit)
  • Minimal external components
  • Standard I2C interface (polling with sub-1ms clock stretching)
  • Optional RDY indication for event mode operation
  • Supply voltage 1.8V to 3.3V
  • Low profile packages
    • DFN-10 (3.0mm x 3.0mm)
    • WLCSP-9 (1.07mm x 1.53mm)


  • Mobile electronics (phones/tablets)
  • SAR safety requirements for laptops, tablets, and phones
  • Wearable devices
  • White goods and appliances
  • Human Interface Devices
  • Proximity activated backlighting
  • Applications with long-term activation
  • Aftermarket automotive


Block Diagram

Block Diagram - Azoteq IQS620A ProxFusion Sensor IC

DFN-10 Pin Designations

Mechanical Drawing - Azoteq IQS620A ProxFusion Sensor IC

WLCSP-9 Pin Designations

Mechanical Drawing - Azoteq IQS620A ProxFusion Sensor IC
Published: 2017-08-22 | Updated: 2022-10-03