SNAU246A
June 2020 – January 2021
LMX2820
1
Trademarks
2
LMX2820EVM Evaluation Module
2.1
Evaluation Module Contents
2.2
Evaluation Setup Requirement
2.3
Resources
3
Setup
3.1
Connection Diagram
3.2
Power Supply
3.3
Reference Clock
3.4
RF Output
3.5
Programming
3.6
Evaluation Software
4
Typical Measurement
4.1
Default Configuration
4.1.1
Loop Filter
4.1.2
Typical Output
4.2
Additional Tests
4.2.1
SYSREF Example
4.2.2
Offset Mixing With PFDIN Pin
4.2.3
External VCO Mode
4.2.4
Register Readback
5
Schematic
6
PCB Layout and Layer Stack-Up
6.1
PCB Layer Stack-Up
6.2
PCB Layout
7
Bill of Materials
8
Troubleshooting Guide
A Using Different Reference Clock
B USB2ANY Firmware Upgrade
C Revision History
6.1
PCB Layer Stack-Up
The top layer is 1-oz. copper.
Figure 6-1
PCB Layer Stack-Up