stevel@tybalt.caltech.edu (Steve Ludtke) (02/12/89)
Hello. I've been building various digitizing and sampling circuits using the ADC0820CCN A/D converter. The chip operates fine usually, but then quite randomly, it stops working and begins to get hot. It all happens reasonably quickly, it takes ~4 sec to get hot enough to burn my finger, and if it's left in this state for more than 1 or 2 min. the chip will (not surprisingly) die. It also occasionally does this immediately after I apply power. I'm using the chip completely within the rated limits, in the RD mode. I have a ~50uf capacitor across the power supply to filter out any transients when it powers up. Has anyone experienced this, or a similar problem with this chip ??? They cost about $10 each, and I'm getting tired of replacing them ... Any suggestions would be greatly appreciated. --------------------------------------------------------------------------- Steve Ludtke stevel@tybalt.caltech.edu ..!cit-vax!tybalt.caltech.edu!stevel stevel@citiago (Bitnet) OBS949 (Amer PPl lnk) 72335,1537 (Compuserve) XJM16487 (Genie)