SBAU375 November   2021

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 Introduction
  3. 2Analog Interface
    1. 2.1 Analog Inputs
    2. 2.2 Comparator Outputs
  4. 3Power Supplies
    1. 3.1 VDD Inputs
  5. 4EVM Operation
    1. 4.1 Analog Inputs: J4
    2. 4.2 User Power: J1 and J2
    3. 4.3 Comparator Outputs: J3
    4. 4.4 Device Operation
  6. 5Layout, BOM, and Schematic
    1. 5.1 Layout
    2. 5.2 Bill of Materials (BOM)
    3. 5.3 Schematic

2.1 Analog Inputs

The analog input to the AMC23CxxEVM printed circuit board (PCB) varies depending on the EVM selected. Each of the single-ended isolated comparators (AMC23C14, AMC23C12, and AMC23C11) has its comparator input pin and external reference pin connected directly to the three-wire screw terminal at J4. For these devices, R7 is populated with a 2.55-kΩ resistor to ground to set the reference voltage to 255 mV. Figure 2-1 shows an analog input schematic for the AMC23C14EVM.

The differential isolated comparator, AMC23C10, has its positive and negative input pins connected directly to the three-wire screw terminal at J4, and R7 is left unpopulated.

GUID-1807C32B-C9CB-4211-AE6D-3BE134D56552-low.pngFigure 2-1 AMC23C14EVM Schematic: Analog Input Section