SBAU493 October   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 Analog Inputs
    2. 2.2 ADC Connections and Decoupling
    3. 2.3 Digital Interface
    4. 2.4 Power Supplies
    5. 2.5 Voltage Reference
    6. 2.6 Clocking
    7. 2.7 Using the ADS125R14 EVM With an External Controller
  9. 3Software Installation and Hardware Connections
    1. 3.1 ADS125R14 EVM GUI Installation
    2. 3.2 ADS125R14 EVM Hardware Connections
  10. 4GUI Operation
    1. 4.1 GUI Navigation and Home Page
    2. 4.2 ADC Configuration
    3. 4.3 Register Settings
    4. 4.4 Analysis Page
      1. 4.4.1 Time-Domain Plot View
      2. 4.4.2 Frequency-Domain Plot View
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1.     Trademarks
  13. 7References

2.5 Voltage Reference

Figure 2-6 shows the ADS125R14 EVM external voltage reference circuit. By default, the EVM uses a low noise, low drift 2.5V REF6025 as the ADC voltage reference. Alternatively, the user can supply an external reference voltage using terminal block J3 and connecting a shunt between pins 2 and 3 on jumper JP2. Verify that any external reference voltage applied to the ADC meets the voltage requirements as described in Table 1-1. Additionally, the ADC registers need to be configured to use an external reference. See the ADC datasheet for more information.


ADS125R14EVM-PDK EVM Voltage Reference

Figure 2-6 EVM Voltage Reference