Azoteq IQS7222B ProxFusion® Capacitive Touch Sensors

Azoteq IQS7222B ProxFusion® Capacitive Touch Sensors are sensor fusion devices for various multi-button applications. Azoteq IQS7222B ProxFusion Sensors feature 18-channel mutual and 8-channel self-capacitive touch and proximity controllers. These sensors are fully I²C-compatible and feature on-chip calculations that enable the IC to respond effectively even in the lowest-power modes. Applications include remote control user interfaces, home automation device user interfaces, and wireless speaker controls.

Features

Highly flexible ProxFusion device
9 (QFN) / 8 (WLCSP) external sensor pad connections
Configure up to 20 mutual capacitance buttons or up to 8 self-capacitance buttons
Built-in basic functions
- Automatic tuning
- Noise filtering
- Debounce and hysteresis
- Differential measurements (reference channels)
- Dual-direction trigger indication
Design simplicity
- PC Software for debugging and obtaining optimal settings and performance
- One-time programmable settings for custom power-on IC configuration
- Auto-run from programmed settings for simplified integration

Automated system power modes for optimal response vs. consumption
I²C communication interface with IRQ/RDY (up to fast plus -1MHz)
Event and streaming modes
Customizable user interface due to programmable memory
1.8V (-5%) to 3.5V supply voltage
Small packages
- WLCSP18 (1.62mm² x 0.5mm) - interleaved 0.4mm x 0.6mm ball pitch
- QFN20 (3mm² x 0.5mm) - 0.4mm pitch