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LMH6552: IMD Measurements LMH6552 vs. LMH6551

Part Number: LMH6552
Other Parts Discussed in Thread: LMH6551,

Hello Team,

cutomer took IMD measurements and have following question:

"My colleague, Ryan, has taken over the measurements of the LMH6552 and LMH6551 samples that you gave me. His measurements show that the IMD3 levels of LMH6551 is much better while the IMD3 in the datasheet of LMH6552 is better. He is not able to reproduce the -77dBc IMD3 presented in the datasheet. Can you help advise Ryan?"



  • Well,,,,

    Those sort of questions are impossible to answer without specific schematics and perhaps a frequency of test?? 

    The LMH6552 should be better at any given frequency given the 5X bandwidth - possibly clipping in test? Is the loading different via different feedback R, etc., etc, etc.