I’ve built the voltage ref plus a single channel of the Cadet II circuit on veroboard (U1, U2, U9) and I’m seeing my U2 getting extremely hot (after about 45 seconds it starts smoking) when I power it up. Has anyone DIY’d this circuit (based off the schematics, not the LZX PCB) and seen similar issues?
I’ve checked my layout/wiring several times (especially the supply pins), visually inspected AND checked for shorts with a multimeter, checked every net for connectivity and metered passive component connections between pins (with the chip out of circuit). I can’t find anything wrong. I tried two different LM6172s (purchased from Mouser) - same result both times.
I know it’s most likely still an issue with my layout, but I’m asking just in case someone has been down this road and had this problem before me