Other Parts Discussed in Thread: VCA821, LMH6733
Dear Team:
Customer would like to use VCA821 to do differernt cable length Equalizer compensation.
Operation frequency is 140MHz, Max cable length is 100m, attenuate 30dB.
Do you think VAC821 is rightparts?
If yes, could you share the circuit tome?
Or do we have another suitable parts?
Hi Thomas and Rohit,
I've modified the spreadsheet within the Analog Wire equalizer post that Rohit shared for your conditions (30dB attenuation at 140MHz- this is 9.5dB attenuation @ 10MHz in cell "N6"). Here is a summary of values to use:
Here is the spreadsheet for your conditions with the use of 2-cascaded stages (identical) and each having 2 banks of RC across RG and using the recommended RF value for LMH6733 (same as the Op Amp used in the Analog Wire post).
8037.5008.Cable Equalization 101 Spreadsheet - 30dB_140MHz_2stages_2banks 10_2_14.xlsx
Let me know if you have any questions about what I have done and how to use the spreadsheet.
Regards,
Hooman
