Evaluation Board User Guide
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The EVAL-AD5252SDZ supports the use of single and dual
power supplies.
In single-supply mode, the evaluation board can be powered
either from the SDP port or externally by the J1-1, J1-2, and
J1-3 connectors, as described in Table 1.
If dual-supply mode is required, the J1-1, J1-2, and J1-3 connectors
must provide the external power supply, as described in Table 1.
UG-274
LINK OPTIONS
Several link and switch options are incorporated in the evalu-
ation board and should be set up before using the board. Table 2
describes the positions of the links to control the evaluation board
by a PC, via the SDP board, using the EVAL-AD5252SDZ in
single-supply mode. The functions of these link and switch
options are described in detail in Table 3 through Table 6.
Table 2. Link Options Setup f or SDP Control (Default)
All supplies are decoupled to ground using 10 μF tantalum and
0.1 μF ceramic capacitors.
Table 1. Maximum and Minimum Voltages of the Connectors
Link No .
A25
A24
Option
3.3 V
GND
Connector No.
J1-1
J1-2
J1-3
Label
EXT VDD
GND
EXT VSS
Voltage
Analog positive power supply, V DD .
For single-supply operation, it is
2.7 V to 5.5 V.
For dual-supply operation, it is
2.25 V to 2.75 V.
Analog GND.
Analog negative power supply, V SS .
For single-supply operation, it is 0 V.
For dual-supply operation, it is
?2.25 V to ?2.75 V.
Table 3. Link Functions
Link No.
A25
A24
Power Supply
V DD
V SS
Options
This link selects one of the following as the positive power supply:
5 V (from SDP).
3.3 V (from SDP).
EXT (external supply from the J1-1 connector).
This link selects one of the following as the negative power supply:
GND (analog ground).
VSS (external supply from the J1-3 connector).
Rev. 0 | Page 3 of 16
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