SLOU539 October   2020 OPA2863

 

  1.   Trademarks
  2. 1Features
  3. 2EVM Specifications
  4. 3Power Connections
    1. 3.1 Split-Supply Operation
    2. 3.2 Single-Supply Operation
  5. 4Input and Output Connections
  6. 5OPA2863DGKEVM Schematic, Layout, PCB 3D Render, and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 OPA2863DGKEVM Layers
    3. 5.3 PCB 3D render
    4. 5.4 Bill of Materials

4 Input and Output Connections

The OPA2863DGKEVM is equipped with SMA connectors for connection of signal generators and analysis equipment. As shipped, the EVM is configured for a non-inverting gain of 1 V/V, split-supply operation, single-ended input and output with 50-Ω termination. For best results, signals must be routed to and from the EVM with cables having 50-Ω characteristic impedance. INA+ (J2) and INB+ (J5) must be used for single-ended input with 50-Ω source. OUTA (J3) and OUTB (J6) are the output connectors for amplifiers A and B respectively. A resistor network (R8, R9, and R10 for amplifier A; R18, R19, and R20 for amplifier B) at the output of the amplifiers convert the output signal to 50-Ω single-ended source, and provides a 2-kΩ load to the amplifier when terminated with 50-Ω load at J3 and J6. A 50-Ω line-impedance match at OUTA (J3) and OUTB (J6) must be preserved. This results in an output measurement loss, and the overall attenuation is approximately 38 dB. See the applications section, schematics, and layouts in the OPAx863 Low-Power, 100-MHz, Rail-to-Rail Input and Output, Voltage-Feedback Amplifier Data Sheet, for more details on how to reconfigure the EVM.