The IQS211 & IQS211A ProxSense® ICs are self-capacitance controllers designed for applications where an awake/activate on proximity/touch function is required. The IQS211/A uses movement detection for applications that require long term detection. The IQS211/A operates standalone or I2C and can be configured via OTP (One Time Programmable) bits. In addition, the IQS211A offers enhanced low power modes.

Datasheet (IQS211): Download
Datasheet (IQS211A): Download
Product change notification: Download


Status:  Production Mouser  DK ElectronicsSeltech logo 2017 Future H CMYK LG


  • Pin compatible with IQS127/128/227/228
  • Automatic Tuning Implementation (ATI)
  • On-chip movement detection algorithm
  • Forced activation when movement detected
  • Minimal external components
  • 25mm detection distance
  • Up to 60pF sensor load
  • I2C interface:
    • Standard I2C (polling)
    • I2C (polling) configuration at start-up with standalone runtime operation
    • I2C with wake-up
  • Standalone interfaces:
    • Dual output: Fixed threshold activation output & movement output
    • Dual output: Movement latch & movement output
  • Movement output & digital input  
  • 1-Wire streaming interfaces:
    • 1-Wire data streaming & movement output
    • 1-Wire & CLK signal
  • Special configurations:
    • Activation based on capacitive load at power-on
    • Automatic Threshold Adjustment
  • Movement output selection: Pulse Frequency Modulation (PFM, default), Pulse Width Modulation (PWM), Latched, PWM combined with activation
  • Internal Capacitor Implementation (ICI)
  • Low power consumption: 80uA (50 Hz response), 20uA (20 Hz response) and 3uA (LP mode, zoom to scanning mode with wake-up), sub-2uA modes availble with IQS211A
  • Low power options: 
    • Low power without activation
    • Low power within activation
    • Low power standby modes with proximity wake-up
  • Supply voltage: 1.8V to 3.6V
  • Low profile TSOT23-6 package


  • Wearable devices
  • Movement detection devices (fitness, anti-theft)
  • White goods and appliances
  • Proximity activated backlighting
  • Applications with long-term activation
  • Human Interface Devices

Application Notes: