Hi,
We wish to use one of your LMX2594 frequency synthesizers in a project. I wonder if you can help with a technical query?
Unfortunately our prototype in circuit LMX2594 synthesiser did not have the phase performance we were hoping for. Some of this was due to power supply layout and the revised circuit makes use of better ground planes and low drop out regulators to help ensure clean supplies. Ideally we would use a 100 MHz LVDS 1ppm TCXO with good phase noise as a frequency reference. We tried several types both, single ended and differential, but still did not get good phase noise performance at an output of 8.2 GHz. He are now hoping to use a clipped sine wave Rakon device.
The load requirements for this are :
Load resistance = 10 kOhms
Load capacitance = 10 pF
Can these requirements be met with the need for a 0.1uF AC coupling capacitor?
If so what configuration would you recommend please?
Many thanks for any help you can offer.
Best regards
Keith