We need test setup used to get the spectrum graphs in 'TYPICAL PERFORMANCE CHARACTERISTICS' of datasheet for AD9957.
- Was there any 500MHz Low Pass Filter or any other filter in the test setup?
- What is the "Lower Sideband Suppression" that are mentioned in the right hand side spectrum shots in the datasheet?
- Is there any spur beyond 500MHz that needs attention while designing our custom board filtering circuit (1GHz sampling clock) ?
There is a 400MHz LPF used in the EVAL-AD9957 as shown below,
- Can you share the -3dB level frequency, roll-off region and the rejection performance ?
Thanks & Regards,