
interface to the AD7824 is similar to the Maxim MAX151, but with the addition of
three address lines (A0–A2) to select which channel is to be converted. Like the
MAX151, the AD7824 may be used in a mode in which the microprocessor starts
a conversion and is placed into a wait state until the conversion is complete. The
microprocessor can also start a conversion on any channel (by reading data from
that channel), then wait for the conversion to complete and perform another read
to get the result. The AD7824 also provides an interrupt output that indicates
when a conversion is complete.
Internal Microcontroller ADCs
Many microcontrollers contain on-chip ...