TIDUF97
September 2024
1
Description
Resources
Features
Applications
6
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
2.2
Design Considerations
2.3
Highlighted Products
2.3.1
TMAG6180-Q1
2.3.2
MSPM0G3507
2.3.3
THVD1454
3
System Design Theory
3.1
Hardware Design
3.1.1
Angle Sensor Schematic Design
3.1.2
MSPM0G3507 Schematic Design
3.1.3
RS485 Transceiver Schematic Design
3.1.4
Power Supply and Reference Voltage
3.2
Software Design
3.2.1
Angle Calculation Timing
3.2.2
Rotary Angle Calculation
3.2.3
Rotary Angle Error Sources and Compensation
3.2.4
Encoder Communication Interface
4
Hardware, Software, Testing Requirements, and Test Results
4.1
Hardware Requirements
4.1.1
PCB Overview
4.1.2
Encoder and JTAG Interface
4.1.3
Software Requirements
4.2
Test Setup
4.3
Test Results
4.3.1
AMR Sensor Sin and Cos Outputs Measurement
4.3.2
Static Angle Noise Measurement
4.3.3
Rotary Angle Accuracy Measurement
4.3.3.1
Impact of Airgap on Noise, Harmonics, and Total Angle Accuracy
4.3.4
RS485 Interface and Signal Integrity
5
Design and Documentation Support
5.1
Design Files
5.1.1
Schematics
5.1.2
BOM
5.1.3
PCB Layout
5.1.4
Altium Project Files
5.1.5
Gerber Files
5.1.6
Assembly Drawings
5.2
Tools and Software
5.3
Documentation Support
5.4
Support Resources
5.5
Trademarks
6
About the Authors
Features
Low noise absolute rotary angle better than 15 ENOB, angle accuracy error less than 0.05° at 25°C and low latency 16us
Small IC packages enable a compact circular PCB with a diameter of 30mm
AMR sensor and integrated Hall sensors for quadrant detection enable full 360° measurements and reduce BOM count
Wide operating magnetic field range 20mT to 1T enables flexible mechanical placement
MCU with integrated dual 12-bit ADC and up to 128-times oversampling and math accelerator help improve efficiency and reduce system cost
RS485 transceiver with integrated 120Ω switchable termination in a VSON-10 package help reduce BOM and space