Datasheet

Evaluation Board User Guide UG-322
Rev. 0 | Page 3 of 12
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The E VA L -AD5110SDZ supports using single power supplies.
The evaluation board can be powered either from the SDP
port or externally by the EXTERNAL-1 and EXTERNAL-2
connectors, as described in Table 2.
The digital logic levels can be powered either from the SDP
port or externally by the VLOGIC_EXT-1 and VLOGIC_EXT-2
connectors, as described in Table 2.
All supplies are decoupled to ground using 10 µF tantalum and
0.1 µF ceramic capacitors.
LINK OPTIONS
Several link and switch options are incorporated in the evalu-
ation board and should be set up before using the board. Table 1
describes the positions of the links to control the evaluation board
by a PC, via the SDP board, using the E VA L -AD5110SDZ. The
functions of these link and switch options are described in
detail in Table 3.
Table 1. Link Options Setup for SDP Control (Default)
Link No. Option
LK2 3V3
LK8 +5V
Table 2. Maximum and Minimum Voltages of the Connectors
Connector Number Label Voltage
EXTERNAL-1 VDD Analog positive power supply, V
DD
.
If connected to the SDP, V
DD
is 3.3 V to 5.5 V.
If controlled externally, V
DD
is 2.3 V to 5.5 V.
EXTERNAL-2 AGND Analog ground, AGND.
VLOGIC_EXT-1 VLOGIC_EXT + Logic positive power supply, V
LOGIC
.
If connected to the SDP board, V
LOGIC
is 3.3 V.
If controlled externally, V
LOGIC
is 1.8 V to V
DD
.
VLOGIC_EXT-2 VLOGIC_EXT − Logic ground, DGND.
Table 3. Link Functions
Link Number Power Supply Option
LK2 V
LOGIC
This link selects one of the following as the logic power supply:
3V3 (from SDP).
EXT (external supply from the VLOGIC_EXT connector).
LK8 V
DD
This link selects one of the following as the positive power supply:
+5V (from SDP).
+3V3 (from SDP).
EXT
1
(external supply from the EXTERNAL connector).
1
If the part is powered using the external connector without connecting the SDP board, +5V jumper must be connected as well.