DG508A
Production
Maxim's DG508A and DG509A are monolithic CMOS analog multiplexers (muxes): the DG508A is a single 8-channel (1-of-8) mux, and the DG509A is a differential...
Datasheet
DG508A on Analog.com
Dear Tech Support Team,
Hope you are doing well.
My board had got malfunction and I checked my board. I found that one input impedance in DG508AAZ/883B(8 Channel Input Multiplexer) was lower than other 7 input ports.
(Malfunction Input : About 10kohm / Normal Input : About 10Mohm)
This input was connected with output of OpAmp supplied with ±15V Voltage.
Could you let me know how it can happened?
I hope you to give me your opinion whether single product defect or damaged from other things.
I'm looking forward to your reply.
Thanks in advance.
Your sincerely,
Hello,
In a situation like this the most likely issue would be with the board assembly. possibly a minor issue when soldering the device to the board or with the board manufacturing.
you should try to rule out any issues like that first.
Regards,
David