Hi,
Simply using the AD5934 as a software selected low frequency 50Hz/60Hz sinewave generator.
In this configuration the AD5934 draws too much current off the +5VDC used to power the IC. Checked current limit on +5VDC power supply. It's not too low.
By removing the AD5934 IC we removed the excessive current draw on +5VDC. Why?
Tried the following:
1) As shown (treating the op amp as a low gain comparator)
2) Floated VIN pin (Lifted from PCBA. Checking if something on the IC's pin might be sucking the excess current?)
3) Shorted the floating VIN pin to the RFB pin
Current still too high in each instance, with Vout equal to about 0.94VDC each time.
Ideas on why this won't work the way I'm trying to use the IC? Are there other low frequency sinewave generators with software controls you might recommend?
Thanks,
Mike
