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Any info on ICL7106 or MAX7106?

Any info on ICL7106 or MAX7106?

Any info on ICL7106 or MAX7106?

(OP)
I have to re-engineer a board that uses an ICL7106 - and a MAX8211.  There are 2 diodes in series from pin 21 of the 7106 to pin 4 of the MAX8211.  What function do these diodes provide.  ANy help would be great!

Thanks,

dwminer

RE: Any info on ICL7106 or MAX7106?

Did you look at the datasheet / app notes?

RE: Any info on ICL7106 or MAX7106?

(OP)
Yes I have reviewed the datasheets and app notes and have not found anything that explains the hookup.

Without the diodes, the display is "supposed" to be a 0-200 range.  With the diodes in, a 0-100 range.  

dwminer

RE: Any info on ICL7106 or MAX7106?

Your posting makes no sense.  Pin 21 on the Maxim ICL7106 is the Backplane drive voltage for an LCD display and is nominally 5V.  Pin 4 on the Maximm MAX8211 is an output current sink.

Whoever did the reverse engineering appears to have made a mistake altogether or missed a connection to something else.

TTFN

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