Could you give me any advice as below?
I have been designing PCB using AD9235 and AD8132.
I have designed AD8132 using input signal impedance matching as 50ohms to get differential output.
My question is to confirm the connection between AD9235 VIN and AD8132 output.
Can I connect AD8132 –OUT with AD9235 VIN+ and AD8132 +OUT with AD9235 VIN-?
In AD9235 data sheet page 16 Fig.35, AD8138 –OUT is connected with AD9235 VIN-.
However on page 23, Fig.46, AD8138 –OUT is connected with AD9235 VIN+.
So it seems I can connect both ways.
- Is there any restrictions or any difference on that?
- I have experience to use AD8132 with AD8349(Modulator) but not with AD9235.
In AD8138 data sheet, AD8138 is best suitable to ADConverter. So I still wonder which to use.
Which do you recommend, AD8132 or AD8138 to drive AD9235?
AD9235 Condition; Sense:+3.3V, VREF:Vocm of AD8132, MODE:AVDD,2/3AVDD, 1/3AVDD, GND selectable
AD8132: positive side AC input, source: +/-5V
I appreciate your quick response.