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UG-815
LINK CONFIGURATION OPTIONS
Multiple link (LKx) options must be set correctly to select the
appropriate operating setup before using the evaluation board.
The functions of these options are described in Table 3.
SETUP CONDITIONS
Before applying power and signals to the evaluation board,
ensure that all link positions are as required by the operating
mode. There are two modes in which to operate the evaluation
Table 3. Link Functions
Link No.
Function
LK1
This link selects the DAC analog voltage source.
Position A selects the internal voltage source (INT_VCC) from the
Position B selects an external supply voltage (EXT_ VCC).
LK2
This link selects the DAC digital voltage source.
Position A selects the digital voltage source from the
Position B selects an external digital supply voltage (EXT_VLOGIC).
LK3
This link selects the power-on voltage for the DAC outputs.
Position A selects midscale as the power-on voltage for the DAC outputs
Position B selects 0 V as the power-on voltage for the DAC outputs
LK4
This link selects the reference source.
Position A selects the internal reference of the
from the SMB connector EXT_REF. Use only Position A with the EVAL-AD5675RSDZ.
Position B selects U5, the ADR431, as the 2.5 V reference source. Do not use Position B with the EVAL-AD5675RSDZ.
LK5
This link selects the gain setting of the AD5675/AD5675R.
Position A allows the SDP software to set the state of RSTSEL.
Position B selects a DAC output span of 0 V to 2 × V
Position C selects a DAC output span of 0 V to V
1
Position A is the default for the EVAL-AD5675RSDZ. Position B is the default for the EVAL-AD5675SDZ.
board. The evaluation board can be operated in SDP controlled
mode to be used with the
can be used in standalone mode.
The Default Position column of Table 3 shows the default
positions in which the links are set when the evaluation board
is packaged. When the boards is shipped, it is set up to operate
with the
SDP-B
ADP7104
(U3).
SDP-B
board (V_IO).
AD5675R
as the reference source or an external reference source
.
REF
.
REF
Rev. A | Page 8 of 13
Evaluation Board User Guide
SDP-B
board, or the evaluation board
board in SDP controlled mode.
Default
Position
A
A
B
1
A/B
A
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