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 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 -1 MHz)
• Event and streaming modes with I2C
• Selectable I2C address
• Standalone output mode
• Supply Voltage: 1.71 V to 3.5 V
• Package options
  • WLCSP11 (1.48 x 1.08 x 0.345 mm) - interleaved 0.35 mm x 0.35 mm ball pitch
  • DFN12 (3 x 3 x 0.75 mm) - 0.5 mm pitch
• Applications
  • SAR Safety Sensor
  • Keyboard backlighting
• Wireless charger wake-up