SLOU554 October   2021 THS4131

 

  1.   Trademarks
  2. 1Features
  3. 2EVM Specifications
    1. 2.1 Power Supply Connections
    2. 2.2 Input and Output Connections
    3. 2.3 Output Common Mode Control (Vocm)
    4. 2.4 Power Down Function
  4. 3Example Schematic and Layout Using THS4130
  5.   9

2.3 Output Common Mode Control (Vocm)

FDAs have a feature to externally drive output common mode (Vocm). This feature can be utilized by populating equivalent value resistors for R1 and R2 to VCC+ and VCC-. This sets the output common mode to mid-supply, a common configuration. Additionally, the option to drive Vocm with the SMA connector exists. For this use case, do not populate R1 or R2. If there is need to terminate the Vocm signal source into 50-Ω, C3 can be replaced by a 50-Ω resistor.