SLVUDQ7 September   2026

 

  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 Specification
    4. 1.4 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. 7Related Documentation

2.2 EVM Connection

To power REF53EVM, an external power supply must be used. For best performance, use a low noise power supply. The input voltage range is shown in Table 2-1.

Table 2-1 Input Voltage Range for REF53EVM
EVM input Device connection EVM minimum input voltage EVM maximum input voltage
IN REF53125AQDDCRQ1 (IN Pin) 1.71V

18V

The default EVM setup is shown in Figure 2-2. In the default EVM setup, a jumper on J6 connects the EVM output to GND through resistor R3, simulating a load on the reference. To test the output of REF53 with no load, remove the jumper from J6. The output reference voltage can be measured using the OUT_F and GND test points provided on the board. For best temperature drift performance, use low thermal EMF probes to measure the output.

REF53EVM REF53EVM Default Setup Figure 2-2 REF53EVM Default Setup

Additionally, there is an option to use a transistor to increase the output current of REF53. By removing C2, removing the jumpers on J4 and J6, and installing R5, R6, and R7, the output voltage can be measured using the test point labeled VOUT HIGH CURRENT. When using this configuration, the device only regulates the voltage while sourcing current and cannot sink current in this configuration.