ive been using that 30a chip up to 9 amps and not noticed any heat issues as discussed earlier in the thred, i suspect my heat is sunk through the connector i am using as its so close to the ic, i am measuring a single ac 230 phase
they are very sensitive to how you lay them out on the pcb, if you dont get it right they dont work, took me a few attempts
in the data sheet there is an explanation on the best method of board design
note, obviously make sure the connector you use is capable of what current you are measuring, not all the small breakout boards that are sold everywhere are capable of handling their intended currents (the connectors). on my board i fill the track with extra solder from the ic pin to the pin of the connector just to be safe.
if you want i can send you the pcb design file, i use Design Spark free its a really great package cant recommend it enough.
