Datasheet

EVAL-AD5222SDZ User Guide UG-349
Rev. 0 | Page 3 of 16
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The EVA L-AD5222SDZ supports using single power supplies.
The evaluation board can be powered either from the SDP port
or externally by the J1-1 and J1-2 connectors, as described in
Tabl e 1.
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
Connector No. Label Voltage
J1-1 EXT Analog positive power supply, V
DD
.
VDD
For single-supply operation, it is 2.7 V
to 5 V.
J1-2 GND Analog ground.
LINK OPTIONS
Several link and switch options are incorporated in the
evaluation 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-B board, using the
EVA L-AD5222SDZ in single-supply mode. The functions of
these link options are described in detail in Table 3 through
Table 6.
Table 2. Link Options Setup for SDP-B Control (Default)
Link No. Option
A25 3.3 V
A24 GND
Table 3. Link Functions
Link No. Power Supply Options
A25 V
DD
This link selects one of the following as the positive power supply:
5 V (from SDP-B).
3.3 V (from SDP-B).
EXT (external supply from the J1-1 connector).
A24
V
SS
This link should be connected to GND (analog ground).