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erratic behavior with a Rohm DA converter


Hul Tytus

Jan 1, 1970
erratic behavior with a Rohm DA converter

A Rohm BU2507, a six channel da converter, is used for setting bias points
and gain for several op amps. The settings for each dac are transmitted by a
microcontroller. Rohm's converter works very well... most of the time.
Occassionaly, though, the output will be 0 volts instead of what is expected.
A conceivable cause could be a time out action taken by Rohm's device when
a data transmission is interupted by an interupt within the microcontroller.
This is pure guessing, however.
Is anyone familiar with this device seen such trouble? If so, do leave a
message here if you have any suggestions.