SLVUDU6 April   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 Interfaces
      1. 2.1.1 Analog Input
      2. 2.1.2 EVM Output Configurations and Descriptions
      3. 2.1.3 Amplifier Output
        1. 2.1.3.1 Differential Output (Diff.)
        2. 2.1.3.2 Fixed Gain Single-Ended Output With Internal Reference (SE Int)
        3. 2.1.3.3 Fixed Gain Ratiometric Output With VDD Reference (R Int)
        4. 2.1.3.4 Single-ended and Ratiometric Output With External Reference (SE/R Ext)
      4. 2.1.4 Modulator Output
        1. 2.1.4.1 Internal Clock Modulator (Mod. Int.)
        2. 2.1.4.2 External Clock Modulator (Mod. Ext.)
    2. 2.2 VDD Power Supply
    3. 2.3 EVM Operation
      1. 2.3.1 Analog Input
      2. 2.3.2 Outputs and VDD Power
      3. 2.3.3 Test Procedure
        1. 2.3.3.1 Equipment Setup
        2. 2.3.3.2 Procedure
  9. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials
  10. 4Additional Information
    1. 4.1 Trademarks
  11. 5Related Documentation

2.1.4.2 External Clock Modulator (Mod. Ext.)

When using a device with a modulator output and external clock, the J3 connector provides access to the DOUT and CLKIN pins of the device. The passive components of R12 and C11 are populated as a low-pass input filter for the clock coming into the device. R10 and C12 are populated as a low pass filter on DOUT. These filters must have a high cut-off frequency, typically at least 10x the clocking frequency and are mainly to stabilize the digital signals and reduce overshoot and high frequency ripple.

VDD and GND are accessible through the J2 terminal block. C7, C8 and C10 serve as decoupling capacitors for VDD and help keep the supply stable.

Using an oscilloscope, the user can observe the differential output signal on J3.3 (CLKIN) and J3.2 (DOUT) with respect to J2.3 (GND).