We are using PGA(Programmable Gain Amplifier) - PGA281AIPW in one of our projects.
We have got couple of questions here with the hardware connectivity.
We have connected a Xilinx Spartan 6 FPGA to the PGA. FPGA will drive the pins (G0(7), G1(6), G2(5),G3(4),G4(3)) respectively.
We have connected VSOP(Pin 11) to +5V, and VSON(Pin 12) to -5V respectively. In this specific case,
Will the PGA work fine with the signals(0s and 1s) driven from FPGA?.If yes, how?
The output from PGA281AIPW is bipolar(VOP(pin9) and VON(pin8)), which inturn feeds a differential ADC(Analog to Digital Converter). We haven't provided any specific
ground pin for PGA281AIPW. Can you please advice how to handle ground in this specific scenario?
Note that we have connected VOCM(pin 10) to ground. But we need to make sure if this design will be fine.