SNAU299 January   2024 LMX1214

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1  Evaluation Setup Requirement
    2. 2.2  Connection Diagram
    3. 2.3  Power Requirements
    4. 2.4  How to Enable Full SPI Control
    5. 2.5  Reference Clock
    6. 2.6  Output Connections
    7. 2.7  Switch Information
    8. 2.8  Default Configuration
    9. 2.9  Divider Mode Example
    10. 2.10 Hybrid Mode: SPI and Pin Mode
  8. 3Software
    1. 3.1 Software Installation
    2. 3.2 Software Description
    3. 3.3 USB2ANY Interface
  9. 4Implementation Results
    1. 4.1 Evaluation Setup
      1. 4.1.1 Buffer and Divider Mode
  10. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 PCB Layout
      1. 5.2.1 PCB Layer Stack-Up
    3. 5.3 Bill of Materials
  11. 6Additional Information
    1. 6.1 Troubleshooting Guide
      1. 6.1.1 General Guidance
      2. 6.1.2 If Output Is Not Seen on CLKOUT
      3. 6.1.3 If Device Features Are Not Active
      4. 6.1.4 If Divider Frequency Is Not Accurate
    2. 6.2 Trademarks

1.1 Introduction

The LMX1214 EVM is an ultra-low additive-jitter RF buffer and divider. The device can buffer RF frequencies up to 16GHz and divide outputs by up to 6.4GHz. A separate auxiliary clock divider can be used for FPGAs or other logic ICs. The device runs from a single 2.5V supply, and is programmed by a digital SPI from a 1.8V, 2.5V, or 3.3V bus controller.

The EVM can be operated with a 3.3V supply voltage when the onboard LDO is utilized. The LDO can be bypassed, in this case the supply voltage is 2.5V. The EVM contains LMX1214, one LDO, a microcontroller and an IO expander.