SBOU257 June   2021 PGA2500

 

  1.   Trademarks
  2. 1Product Overview
  3. 2Features
  4. 3Getting Started
    1. 3.1 Electrostatic Discharge Warning
    2. 3.2 Unpacking the EVM
    3. 3.3 Absolute Operating Conditions Warning
  5. 4Setup Guide
    1. 4.1 Analog and Digital Power Supplies
    2. 4.2 Microphone Input
    3. 4.3 Phantom Power Connections
    4. 4.4 DC Blocking Capacitors
    5. 4.5 Protection Network
    6. 4.6 Configurable Input Circuitry
    7. 4.7 Configurable Output Circuitry and Preamp Output Connector
  6. 5Schematic, PCB Layout, and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 PCB Layout
    3. 5.3 Bill of Materials
  7. 6Software Operation
    1. 6.1 Applications Software Overview
    2. 6.2 Using the GUI

4.7 Configurable Output Circuitry and Preamp Output Connector

The configurable portion of the output circuit includes R17, R18, R19, R20, R21, C13, C14, and C15. These components support prototyping of additional circuitry, such as pads and filters, as well as emulation of various loading conditions. During assembly at the factory, resistors R18 and R19 are replaced by 0-Ω shunt resistors. Resistors R17, R20, and R21, as well as capacitors C13 through C15, are not installed. The differential preamplifier output is provided at connector J4, which is a 3-pin male XLR connector, or at connector J6, which is a 1/4-inch TRS connector.