I have a quick question about the AD9834 DDS. I have designed a board that is going to become an automated test rig for a few products. It will take out a lot of hard work when testing a board. For instance, plugging in a board and it measuring voltages at certain points, checking quiescent current etc. One of these test is to feed a small signal sine wave to a specified pin. The amplitude needs to be configurable so I have used the CN-0156 application note and used a DAC on the FSAdjust pin. This works well.
However, I think I completely misunderstood the pins IOUT and IOUTB. I thought they were essentially 2 seperate and configurable outputs. But when testing them I was getting odd outputs on both. Then, when I measured between the two pins, I got the intended sine wave.
This wouldn't ordinarily be a problem but I need to send the sine wave to one pin, and cant send both IOUT and IOUTB. Is there a way to get a sine wave with reference to GND on just one of IOUT / IOUTB?
Alternatively is there a similar AD - DDS that has adjustable amplitude with a single voltage output?