SNAU289A August   2023  – August 2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
  8. 2Hardware
    1. 2.1 Setup
    2. 2.2 EVM Connection
    3. 2.3 Jumper Information
    4. 2.4 Best Practices
  9. 3Implementation Results
    1. 3.1 Evaluation Setup
    2. 3.2 Performance Data and Results
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  11. 5Compliance Information
    1. 5.1 Compliance and Certifications
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Revision History

2.2 EVM Connection

The headers of REF54EVM are named similar to pin name of REF54250CDR for easy understanding. Default EVM setup is shown in Figure 2-2. Input power supply must be connected between VIN1 and GND1 header. Pin 2 of EN1 header can be connected to power supply directly or pin 1 of EN1 header to enable the device. The user can also leave EN1 header floating to enable the output. PIN 2 of EN is connected to PIN 3 to disable the device. Output is measured between pin 2 of VOUT1 header and GND_S header. The user can connect R3 to get lower noise output with NR pin. Please refer to the REF54 data sheet for more details on NR pin.

REF54EVM REF54EVM Default Setup Figure 2-2 REF54EVM Default Setup

Table 2-1 lists the detailed function of VIN1 and EN1 header.

Table 2-1 REF54 EVM Input Connection
Terminal Pin Connection Function
VIN1 VIN Connect to power supply.
EN1 EN

Connect jumper between pin 2 and 3 to enable the output

Connect Jumper between pin 2 and 1 to disable the output