Azoteq IQS624 ProxFusion® Sensor IC

Azoteq IQS624 ProxFusion® Sensor IC integrates multiple sensor technologies onto a single chip. The IQS624 offers Hall-effect rotation sensing, along with dual-channel capacitive proximity and touch sensing, or single-channel inductive sensing. The IQS624 is designed for applications where any or all of these technologies may be required. The two on-chip Hall-effect sensors calculate the angle of a magnet rotating parallel with the sensor.

The sensor is fully I²C compatible and on-chip calculations enable the IC to stream the current angle of the magnet without extra calculations. By combining multiple sensors onto a single sensor IC, the IQS624 ProxFusion Sensor IC allows developers to reduce the bill of materials, power consumption, and board space required for an application. The IQS624 is offered in a compact 3mm x 3mm DFN-10 package.

Features

Hall effect angle sensor
- On-chip Hall plates
- 360° Absolute Output
- 1° Resolution, calculated on chip
- Relative rotation angle
- Detect movement and the direction of movement
- Raw data: can be used to calculate degrees on an external processor
- Wide operational range
- No external components required
Partial auto-calibration
- Continuous auto-calibration, compensation for wear or small displacements of the sensor or magnet
- Flexible gain control
- Automatic Tuning Implementation (ATI)
  - Performance enhancement (10 bit)
Inductive sensing
- Only external sense coil required (PCB trace)

Capacitive sensing
- Full auto-tuning with adjustable sensitivity
- 2pF to 200pF external capacitive load capability
Multiple integrated UI
- Proximity / Touch
- Proximity wake-up
- Event mode
- Wake Hall sensing on proximity
Minimal external components
Standard I²C interface
Optional RDY indication for event mode operation
Low power consumption
- 240uA (100Hz response, Hall)
- 55uA (100Hz response, capacitive)
- 65uA (20Hz response, Hall)
- 15uA (20Hz response, capacitive)
- 5uA (5Hz response, capacitive)
Supply Voltage 2.0V to 3.6V