1. I’m using the ADA4961ACPZN-R7, which has a typical output impedance of 50 Ω, but my load expects a differential impedance of 100 Ω. How can I match the output impedance to the load efficiently without significant signal loss? I have attached my current output stage schematic— please review and suggest a better or more efficient way to do the impedance matching? Also, should I add a low-pass filter (LPF) at the output stage as suggested in the datasheet? If yes, what type and values would you recommend for minimal distortion?
2. Also, I want to connect SPI lines to 8 ADA4961 chips in my design. My plan is to share the SDIO and clock lines across all chips, but use individual chip-select (CS) lines for each. Will this shared SPI bus configuration cause any issues? Any best practices I should be aware of?
