IQS326A

The IQS326 ProxFusion® IC is a sensor fusion device for rotation and angle sensing applications using a diametrically polarised magnet in an off-axis configuration. The included ProxFusion® channel can be used for integrated UI applications or as a wake-up channel. A linear resonant actuator may be connected to the integrated H-bridge, allowing for automatic playback of haptic effects on touch or rotation events.

OVERVIEW

Main Features

Highly Flexible ProxFusion® Device
Hall-Effect Angle Sensor
- 4 Hall plates
- On-/Off-axis orientation
- 16-bit absolute angle output
- <1° angle error¹
- Wide operational range
- Automatic Tuning Implementation (ATI)
ProxFusion® Channel
- Supports self-capacitive or inductive sensing
- Automatic Tuning Implementation (ATI)
- Button UI to detect large changes
- Movement UI to detect small/rapid changes
- Integrates with Hall angle sensor for virtual freewheel UI
Interval UI
- Configurable number of intervals per rotation
- Configurable hysteresis between intervals
Virtual Freewheel/Hyperscroll UI
- Integrates the ProxFusion® Movement UI with the Hall sensor to detect “flick” gestures
- Emulates a freely-spinning wheel – adds hyperscroll functionality to devices without expensive mechanical assemblies
I²C Interface With IRQ/RDY Signal
UI Options
- Automatic synchronisation with mechanical ratchets
- Configurable number of intervals per rotation
- Configurable hysteresis between intervals
- Inductive force-based infinite scroll
Integrated LRA Driver
- Configurable haptic effect using single-byte waveform configuration
- Automatic haptic playback on interval changes (rotation) or touch
I²C Interface With IRQ/RDY Signal
Design Simplicity
- PC software for configuration and debugging
- Guidelines for magnet selection and mechanical constraints
Supply Voltage: 1.8 V to 3.6 V
Available packages:
- QFN20 Package (3 × 3 × 0.5 mm – 0.4 mm pitch)
- WLCSP11 Package (1.35 × 1.35 × 0.5 mm)