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Azoteq IQS269 ProxFusion® Sensor Interfaces

Multi-sensor ICs perform reliable, low-power intrusion and tamper detection

Azoteq’s ProxFusion® family of multi-functional sensor interfaces monitor multiple sensor inputs with a single chip. Designers can use a ProxFusion® device to implement intrusion, tamper-detection systems and modules. The sensor interfaces occupy a small board footprint and consume little power to give long battery run-times in wireless devices.

The Azoteq ProxFusion® range of devices supports combinations of the following sensors:

  • PIR motion detection
  • Inductive sense detection of the opening or closing of doors, windows or cabinets
  • Inductive sensing to detect small movements of products or devices
  • Capacitive sensing to detect the proximity and/or touch of a human hand
  • Hall effect sensing of the presence, absence or rotation of a magnet
  • Temperature sensing to compensate for thermal effects
  • Ambient light sensing

Typical implementations in security applications will use two ProxFusion® sensors: one, the primary sensor, to detect intrusion; and an additional, secondary sensor used as a back-up sensor for the primary device. The secondary sensor might also detect tampering with the primary sensor, indicating an attempt to disable or bypass it.

The Azoteq IQS269 is an ideal ProxFusion® product for tamper and intrusion detection: it features eight external sensor connections for capacitive, inductive and PIR sensing, together with an internal Hall magnetic sensor.

IQS269 Features

  • Highly-flexible ProxFusion® controller
  • Supply-voltage range: 1.8V to 3.6V
  • <5μA operating current in simultaneous capacitive and inductive sensing mode
  • I2C interface
  • Package options:
    • 3mm x 3mm QFN16
    • 1.65mm x 1.65mm WLCSP-16

IQS269 Applications

  • Security and access control equipment
  • Metering
  • Home and building automation


Azoteq IQS269A


Evaluation Kit

The IQS269 evaluation kit implements inductive open/close detection together with capacitive and inductive tamper detection.