IQS325

The IQS325 ProxFusion® IC is a sensor fusion device for rotation and angle sensing applications using a diametrically polarised magnet in an on-axis or off-axis configuration. The included ProxFusion® channel can be used for integrated UI applications or as a wake-up channel. Standalone mode and quadrature outputs allow the IQS325 to be used as a drop-in replacement for mechanical rotary encoders.

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
UI Options
- Automatic synchronisation with mechanical ratchets
- Configurable number of intervals per rotation
- Configurable hysteresis between intervals
- Inductive force-based Infinite scroll
I²C Interface With IRQ/RDY Signal
Standalone Mode
- Quadrature outputs indicate interval change and direction
- GPIO output to indicate button press on the ProxFusion® channel
Design Simplicity
- PC software for configuration and debugging
- Guidelines for magnet selection and mechanical constraints
Supply Voltage: 1.71 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)