TIDUFC1A
November 2025 – February 2026
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
ADS127L21B
2.3.2
REF81
2.3.3
REF54
2.3.4
RES21A
2.3.5
THP210
2.3.6
OPA828
3
System Design Theory
3.1
Range Selection
3.2
Linearity and Low-Noise Signal Chain
3.3
Calibration
3.4
Additional System Design Considerations
4
Hardware, Software, Testing Requirements, and Test Results
4.1
Hardware Description
4.1.1
PCB Interface
4.1.2
Input Multiplexer
4.1.3
Gain Multiplexer
4.1.4
Power Supplies
4.1.5
Clock Tree
4.2
Software Requirements
4.3
Test Setup
4.4
Test Results
4.4.1
Integral Nonlinearity Measurements
4.4.2
Noise Simulation
4.4.3
Noise Measurements
4.4.4
Conclusion
5
Design and Documentation Support
5.1
Design Files
5.1.1
Schematics
5.1.2
BOM
5.2
Tools
5.3
Documentation Support
5.4
Support Resources
5.5
Trademarks
6
About the Author
7
Revision History
5.2
Tools
ADS127L21 EVM Software User Interface
This reference design is intended to be used with the dedicated GUI for the ADS127L21 EVM.