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