TIDUFF8
September 2025
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
LDC5072-Q1
2.3.2
MSPM0G3507
2.3.3
TPSM365R3
2.3.4
TLV9062
3
System Design Theory
3.1
Hardware Design
3.1.1
Target PCB
3.1.2
Coil PCB
3.1.3
Signal Chain PCB
3.1.3.1
Inductive Angle Position Sensor Front-End Schematic
3.1.3.2
Differential to Single-Ended Signal Conversion
3.1.4
MSPM0G3507 Schematic Design
3.1.5
Power Supply Design
3.2
Absolute Position Calculation
3.3
Software Design
3.3.1
Angle Calculation Timing
3.3.2
Rotary Angle Error Sources and Compensation
4
Hardware, Software, Testing Requirements, and Test Results
4.1
Hardware Requirements
4.1.1
PCB Overview
4.1.2
Encoder Interface
4.2
Software
4.3
Test Setup
4.4
Test Results
4.4.1
Inductive Sensor Sine and Cosine Noise Measurement
4.4.2
Absolute Angle Noise Measurement
4.4.3
Rotary Angle Accuracy Measurement
4.4.4
Impact of Air Gap on Noise, 4th Electrical Harmonics and Total Angle Accuracy
4.4.5
Power Consumption Measurement
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
Trademarks
6
About the Author
5.3
Documentation Support
Texas Instruments,
Choosing a position sensor in motor control Analog Design Journal
Texas Instruments,
Calibration of AMR Angle Sensors Application Report
Texas Instruments,
Achieving Highest System Angle Sensing Accuracy Application Note
Texas Instruments,
High-resolution, low-latency, compact absolute angle encoder reference design with AMR sensor reference design
Texas Instruments,
48V, 85A small form-factor three-phase inverter reference design for integrated motor drives reference design
Texas Instruments,
TMS320F28003x Real-Time Microcontrollers Technical Reference Manual Technical Reference Manual