Azoteq IQS7222C ProxFusion® Controller ICs

Azoteq IQS7222C ProxFusion® Controller ICs are sensor function appliance chips featuring multi-button application modes combined with capacitive slider and wheel capabilities. The sensors offer built-in basic functions such as automatic tuning, noise filtering, differential measurements, debounce/hysteresis, and dual direction trigger indication. The IQS7222C ICs are available in a 0.62mm² x 0.5mm WLCSP-18 package style or a 3mm² x 0.5mm QFN20 package. The IQS7222C ProxFusion Controller ICs are fully I²C compatible and on-chip calculations enable the IC to respond effectively even in the lowest power modes.

Features

Highly flexible ProxFusion device
9 (QFN)/8 (WLCSP) external sensor pad connections
Configure up to 10 Channels using the external connections or internal sensor
External sensor options
- Up to 8 self capacitive buttons
- Up to 4 self capacitive wear detection pairs (with physical reference)
- Up to 10 projected capacitive touch/proximity sensors
- Up to 4 inductive sensor elements
Built-in basic functions
- Automatic tuning
- Noise filtering
- Differential measurements (reference channels)
- Debounce and hysteresis
- Dual direction trigger indication
Built-in signal processing options
- Slider output
- Wheel output

Simplistic design
- 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 package options
- 1.62mm² x 0.5mm WLCSP-18 package, interleaved 0.4mm x 0.6mm ball pitch
- 3mm² x 0.5mm QFN-20 package, 0.4mm pitch

Applications

SAR compliance in mobile devices
Waterproof buttons (inductive)
Wear detection

Low power wake-up buttons/proximity
Appliance user interface (sliders, wheels, and buttons)

Specifications

Supply voltage range
- 1.71V to 3.5V at the VDD pin
- 0V applied at the VSS pin
1µF to 10µF capacitance range
±4000V electrostatic discharge rating

Internal regulated supply output
- 1.5V to 1.75V for the analog domain
- 1.57V to 1.8V for the digital domain
-40°C to +85°C temperature range

Azoteq IQS7222C ProxFusion® Controller ICs

Features

Applications

Specifications

Block Diagram

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