SBOU263 April   2021 OPA3S2859

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
  3. 2Configuration and Usage
    1. 2.1 Power Connections
    2. 2.2 Power Down, Select, and Latch Connections
    3. 2.3 Input and Output Signal Connections
    4. 2.4 Feedback Network Configurations
    5. 2.5 Important Layout Considerations
    6. 2.6 Schematic
    7. 2.7 Layout Prints
  4. 3Related Documentation
  5. 4Revision History

2.3 Input and Output Signal Connections

The signal input and outputs on the EVM all provide SMA connectors along with resistors to properly impedance match the connections. The INA+, INB+, INA-, and INB- include footprints for simple resistors to ground that can be used to impedance match the inputs or short the input connection to ground. The outputs feature a series-shunt resistor network configuration to allow for an impedance matched network that presents a higher load value to the amplifier. The suggested default values for the output resistors provides an approximate 200-Ω load to the amplifier while matching a 50-Ω terminated output connection. The COMA and COMB inputs a series resistor input and an shunt input that can be used for a termination resistor or to add capacitance to the input.