CAM622

CAM622 Resonant Inductive Encoder IC (ABN, SPI) for Type B Sensors

CambridgeIC’s CAM622 is a Resonant Inductive Encoder IC. It includes a Sensing Engine for measuring contactless position, and an Interface Processor that can generate encoder style outputs. The Sensing Engine connects to an external sensor. This detects the position of a contactless inductive resonant target. Both sensor and target are made from PCBs. They include coil patterns for resonant inductive sensing. These are available from CambridgeIC, so customers can manufacture the parts themselves and integrate them with their product. The CAM622 works with a variety of different sensor and target sizes. The Interface Processor can generate encoder style digital outputs, using an SPI interface for configuration and diagnostics. A host may alternatively use SPI as the primary interface, reading measurement results at high speed.

Features

• Works with CambridgeIC’s “Type B” sensor PCBs
• Fully ratiometric Sensing Engine
• Automatic tuning to target frequency
• Optional adaptive filter for extra resolution
• Filter can be configured for zero phase delay
• Encoder style ABN outputs
• UVW outputs for motor commutation
• SPI for configuration or reading results
• Internal software upgradable over SPI
• Exceptionally stable across temperature

Performance

• Up to 33000 position samples per second
• Resonator frequency tuning range ±10%
• ABN cycles/rev configurable up to 16384