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

2.2 Comparator Outputs

The comparator outputs are accessible on the three-wire screw terminal J3 on pins 2 and 3. Table 2-1 lists the pin connections to the J3 screw terminal for each of the AMC23Cxx devices.

Table 2-1 Comparator Outputs
Device J3.2 J3.3
AMC23C14 OUT1 (open-drain) OUT2 (open-drain)
AMC23C12 OUT (open-drain) LATCH (input)
AMC23C11 OUT1 (open-drain) LATCH (input)
AMC23C10 OUT1 (open-drain) OUT2 (push-pull)

Depending on the isolated comparator device, each output may be an open-drain or push-pull configuration. The OUT1/OUT pin is open-drain in all cases, and the 4.7-kΩ resistor R4 is used to pull the output up to VDD2. For the AMC23C11EVM and the AMC23C12EVM, the OUT2/LATCH pin is an input and the pullup resistor R3 is left unpopulated. For the AMC23C10EVM, the OUT2/LATCH pin is a push-pull output, with no pullup resistor populated on R3. For the AMC23C14EVM, the OUT2 pin is an open-drain output, and R3 is populated with a 4.7-kΩ resistor pulling the pin up to VDD2.

Figure 2-2 shows the comparator output section of the AMC23CxxEVM schematic.

GUID-8D4B858C-C1B3-4DC5-81B3-02E57E7B18A1-low.png Figure 2-2 AMC23CxxEVM Schematic: Comparator Output Section