I found this on Google. This is Datta Paduka temple. And it is in Andhra Pradesh (now I don't know after partition)
I am not sure I have heard that it is there in parvathamalai. It is only hear say . Have seen lingAm and ambal together in the same shrine at very few temples.
Yes in Draksharamam in East Godavari District in Andhra pradesh.... See Photo of Lingam with parvathy beside lingam Also in Yaganti near Kurnool in Andhra....Shiva and parvathy form can be seen in Lingam itself......They are in Uma Maheswara form....Photo below