EVAL-AD7405FMCZ User Guide
UG-690
LINK CONFIGURATION OPTIONS
There are multiple link options that must be set correctly to
select the appropriate operating setup before you begin using
the
EVAL-AD7405FMCZ
evaluation board. The functions of
these options are outlined in Table 2.
SETUP CONDITIONS
Take care before
applying power and signals to the evaluation
board to ensure that all link positions are as required by the
operating mode. There are two modes in which to operate the
evaluation board. The evaluation board can be operated in
SDP-H1 controlled mode to be used with the
EVAL-SDP-CH1Z
board, or the evaluation board can be used in standalone mode.
The default position column of Table 2 shows the default
positions in which the links are set when the evaluation board is
packaged. When the board is shipped, it is set up to operate in
SDP-H1 controlled mode, with the power supplied from the
EVAL-SDP-CH1Z
board and the analog supply rail (V
DD1
) being
supplied via the on-board
iso
Power®
ADuM6000
dc-to-dc
converter.
Table 2. Link Options
Category
Link
Default
Position
Function
Power Supplies LK1
A
This link selects the
AD7405
V
DD1
supply source. Remove LK5 if using either Position A or Position B.
Position A: V
DD1
is supplied from the
ADuM6000
on-board device.
Position B: V
DD1
is supplied externally via Connector J3.
LK5
Removed When LK5 is inserted, V
DD1
is supplied via a step-down dc-to-dc regulator via J4. Remove LK5 if V
DD1
is
supplied via LK1. Remove LK1 if V
DD1
is supplied via LK5.
LK2
A
This link selects the
AD7405
V
DD2
supply source.
Position A: V
DD2
is supplied from the
EVAL-SDP-CH1Z
board.
Position B: V
DD2
is supplied from the on-board 5 V regulator.
Position C: V
DD2
is supplied externally via Connector J5.
Analog Input
LK7
Removed When LK7 is inserted, VIN+ is shorted to ground. Remove LK7 if a signal is applied to AIN+.
LK8
Inserted
When LK8 is inserted, VIN− is shorted to ground. Remove LK8 if a signal is applied to AIN−.
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