TIDUFE3
July 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
TPS7A03
2.3.2
REF35
2.3.3
TVS3301
2.3.4
OPA391
2.3.5
AFE881H1
2.3.6
AFE882H1
2.3.7
SN74LV8T165
2.3.8
TMUX1219
3
System Design Theory
4
Hardware, Software, Testing Requirements, and Test Results
4.1
Hardware Requirements
4.2
Test Setup
4.3
Test Results
4.3.1
Linearity Tests
4.3.1.1
Linearity Tests Summary
4.3.2
Noise Tests and Current Histogram
4.3.2.1
Noise Tests and Current Histogram Summary
4.3.3
Step Response
4.3.3.1
Step Response Summary
4.3.4
Start-Up
4.3.5
MCU Current
4.3.5.1
MCU Current Summary
4.3.6
System Currents
4.3.6.1
Summary of System Currents
5
Design and Documentation Support
5.1
Design Files
5.1.1
Schematics
5.1.2
BOM
5.1.3
PCB Layout Recommendations
5.1.3.1
Layout Prints
5.2
Tools and Software
5.3
Documentation Support
5.4
Support Resources
5.5
Trademarks
6
About the Author
Design Guide
Field Transmitter Platform: 4mA to 20mA Loop-Powered Interface Reference Design