EVAL-AD7450A/EVAL-AD7451
Evaluation Board User Guide
Rev. A | Page 12 of 28
MODES OF OPERATION
SERIAL INTERFACE
The
AD7450A
/
AD7451
use a high speed serial interface which
allows sampling rates up to 1 MSPS. For details on the operation of
the serial bus, refer to the
AD7450A
and
AD7451
data sheets.
The
EVAL-AD7450ASDZ
/
EVAL-AD7451SDZ
communicates
with the
EVAL-SDP-CB1Z
board using level shifters. The
EVAL-SDP-CB1Z
operates at a 3.3 V logic level. This allows
VDRIVE voltages exceeding 3.3 V to be used without damaging
the SDP interface.
Details of the serial interface can be found in the
AD7450A
and
AD7451
data sheets.
STANDALONE MODE
The
EVAL-AD7450ASDZ
/
EVAL-AD7451SDZ
may also be
used without the
EVAL-SDP-CB1Z
. In this case, connect to
the digital interface via the test-point connectors.
Remove R31, R35, and R36 to isolate the
AD7450A
/
AD7451
from the SDP interface circuitry.
