2 Channel proximity sensing/ single channel proximity sensing with reference tracking controller with Movement and SNR Boost User Interfaces. The device is specifically designed for SAR and other similar high-performance proximity sensing requirements. The device features an I2C communications interface and the option to run the device in a standalone mode.

Device Overview

The IQS320 ProxFusion® IC is a self-capacitive sensing device optimised to work in SAR and similar applications that require the detection of very small capacitive changes in a high capacitive load environment. The sensor is fully I2C compatible with the ability to operate in a standalone mode. On-chip calculations allow the device to process small movements, and detect the smallest possible changes in capacitance. It is recommended to use the e SNR Boost UI in conjunction with the Reference UI in applications with sensitive or critical proximity triggers and high capacitance load environments.

Main Features

  • Dual channel self-capacitance Sensor
  • 2 External sensor pad connections
  •  External sensor options:
    • 2 self-capacitance sensors
    • 1 self-capacitance sensor with a reference tracking sensor
  • Built-in basic functions:
    • Automatic tuning
    • Noise filtering
    • Debounce & Hysteresis
    • High performance in high capacitive load conditions
  • Built-in Signal processing options:
    • Touch/Proximity output
    • Movement User Interface
    • Reference User Interface
    • Signal to Noise Ratio Boost User Interface by means of oversampling (add Reference UI for optimal performance)
  • Design simplicity
    • PC Software for debugging & optimal setup for performance
  • I2C communication interface with IRQ/RDY(up to fast plus -1MHz)
  • Event and streaming modes with I2C
  • Selectable I2C address
  • Standalone output mode
  • Supply Voltage 1.71V to 3.5V
  • Package options
    • WLCSP11 (1.48 x 1.08 x 0.345 mm) - interleaved 0.35mm 0.35mm ball pitch
    • DFN12 (3 x 3 x 0.75 mm) - 0.5mm pitch
  • Applications
    • SAR Safety Sensor
    • Keyboard back-lighting
  • Wireless charger wake-up
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