This reference design demonstrates a small form factor, absolute, single-turn, magnetic rotary angle encoder circuit design using a high-precision analog AMR 360° angle sensor with sine and cosine differential ratio metric analog outputs and integrated quadrant detection using Hall sensors. The Cortex M0 MCU includes 4MSPS dual sampling 12-bit ADCs and up to 14-bit effective resolution at 250ksps with hardware averaging for low noise and low latency absolute angle calculation and a 4Mbaud UART for high-speed data transmission. The absolute encoder requires a 5V input supply voltage with ±10% tolerance and offers a bidirectional communication interface using a half-duplex RS-485 transceiver.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Design guide | High Resolution Low Latency Compact Absolute Angle Encoder Reference Design With AMR Sensor | PDF | HTML | Sep. 30, 2024 |
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