IQS7221E/G

The IQS7221 ProxFusion® IC’s are sensor fusion devices for rotation and angle sensing applications designed for on-axis orientation. ProxFusion® channels are included for integrated UI applications. Two dedicated Quadrature outputs make the product a drop-in replacement for mechanical and optical rotary encoders. The IQS7221E includes a capacitve sensing channel for low power management. While the IQS7221G includes a virtual freewheel UI for more intuitive scrolling, using Inductive sensing to sense when the user finger is resting on the wheel.

OVERVIEW

Main Features

Highly flexible ProxFusion® device
Hall effect angle sensor
- 4 Hall plates
- Supports on-axis orientation
- 16-bit absolute angle output
- < 1° resolution, calculated on-chip
- Relative/Absolute rotation angle
- Detect movement and the direction of movement
- Wide operational range
- Automatic Tuning Implementation (ATI)
- Automatic synchronisation with mechanical ratchet
ProxFusion® Channel
- Supports one self-capacitive or mutual-capacitive sensor
- Ultra-low power wake-up on touch
- Full auto-tuning (ATI) with adjustable sensitivity
Sensor flexibility
- Internal voltage regulator
- No external components required for Hall measurements
- I2C Interface with IRQ line
Design simplicity and support
- PC software for debugging and configuring for optimal performance
- Magnet and mechanical constraints, guidelines and best practices
Multiple integrated UIs
- Proximity and touch events on ProxFusion® channel
- Proximity wake-up from ultra-low power mode
- Hysteresis interval mode
- Event modes with configurable angle-change, interval or touch /prox events
- Quadrature standalone output for Hall measurements
- Virtual freewheel UI
Supply Voltage 2.2 V to 3.5V
Small packages
- WLCSP18 (1.62 x 1.62 x 0.5 mm) - interleaved 0.4mm x 0.6mm ball pitch
- QFN20 (3 x 3 x 0.5 mm) - 0.4mm pitch