Other Parts Discussed in Thread: INA1650, DRV134, INA134
I have a few questions about using the INA1650 as a differential line driver (per Fig 62 of the datasheet):
1) I would like 3 independent outputs, so the input signal (which would come from the output of a 20k pot) will drive (3) INA1650 IC's.
a. What would be the input impedance seen by the pot? 250k/3 = 83.3k ?
b. Do you believe this is high enough for the 20k pot to drive?
2) Do you recommend adding a resistor in series with Pin 2 for each of the INA1650s? If yes, what value?
3) The outputs will connect to 3-pin XLR jacks. If one were to use an XLR-to-RCA adapter (which shorts Pins 1&3) to convert from differential to single-ended output, will the INA1650 be ok with this? The DRV134 data sheet shows how the differential output can be converted to single-ended by shorting the OUT- to AGND, but I wasn't sure if this is the case with the INA1650)?