SLOU562 September 2022
The DEM-OPA-RUN-EVM is equipped with footprints for SMA connectors to connect the signal generators and analysis equipment. For best results, the inputs and outputs to the EVM should be terminated to 50-Ω impedances and signals must be routed to and from the EVM with cables having 50-Ω characteristic impedance. For non-inverting configurations INA+ and INB+ (J3 and J6) include termination resistors (R13 and R24), which can be populated with 50-Ω resistors. For inverting configurations, a resistor network (R3, R4, R7, R16, R17, and R18) is included to match the input impedance while maintaining a desired gain resistor value. OUTA and OUTB (J2 and J5) are the output connectors for the amplifiers. Resistor networks (R8, R9, R10, R19, R20, and R21) at the output of the amplifiers can be used to convert the signal to 50-Ω single-ended source while providing a larger total load to the amplifiers when terminated with 50-Ω loads. Output capacitors C7 and C9 may also be populated with resistors to allow for additional output configurations.