Other Parts Discussed in Thread: INA134, INA137
Hi,
I am designing a balanced audio output using the DRV135, that will drive another equipment (An amplifier, exact reference unknown at this moment) via XLR connector and several meters cable.
I may have missed this in the datasheet, but i don't know what do do with R1, R2 and RL in the schematic below:
I understand that one would either use 600 Ohm RL, or two 600 Ohm R1 and R2. So, my questions are:
- From figure 31, it seems having 600 Ohm RL is the best option in terms of THD+N, then would we even consider the other option (using two 600 Ohm resistors R1 and R2) ? Is there a situation where it makes more sense to have R1 + R2 instead of RL?
- I assume the value of 600 Ohm is related to the impedance of the cable that will be driven, right? Does this value need to match the cable characteristic impedance?
Thank you very much,