Evaluation Board Hardware; Power Supplies; Link Options - Analog Devices EVAL-AD5254SDZ User Manual

Evaluation Board User Guide

EVALUATION BOARD HARDWARE

POWER SUPPLIES

The EVAL-AD5254SDZ 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.
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
J1-1 EXT VDD
J1-2 GND
J1-3 EXT VSS
Table 3. Link Functions
Link No. Power Supply
A25 V
DD
A24 V
SS
Voltage
Analog positive power supply, V
For single-supply operation, it is
2.7 V to 5.5 V.
For dual-supply operation, it is
2.5 V to 2.75 V.
Analog GND.
Analog negative power supply, V
For single-supply operation, it is 0 V.
For dual-supply operation, it is
−2.5 V to −2.75 V.
Options
This link selects one of the following as the positive power supply:
5 V (from SDP).
3.3 V (from SDP).
EXT VDD (external supply from the J1-1 connector).
This link selects one of the following as the negative power supply:
GND (analog ground).
VDD VSS (external supply from the J1-3 connector).

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-AD5254SDZ 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 for SDP Control (Default)
Link No.
A25
A24
.
DD
.
SS
Rev. 0 | Page 3 of 16
UG-236
Option
3.3 V
GND