EVAL-AD5340DBZ User Guide
UG-981
Rev. 0 | Page 3 of 13
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The
EVAL-AD5340DBZ
evaluation board can be powered
either from the
SDP-B
port or externally by the J5 and J6
connectors, as described in Table 1.
The nanoDAC®
EVAL-MBnanoDAC-SDZ
motherboard
supports single- and dual-power supplies.
Both AGND and DGND inputs are provided on the board. The
AGND and DGND planes are connected at one location on the
EVAL-MBnanoDAC-SDZ
. It is recommended that AGND and
DGND not be connected elsewhere in the system to avoid
ground loop problems.
All supplies are decoupled to ground with 10 µF tantalum and
0.1 µF ceramic capacitors.
Table 1. Power Supply Connectors
Connector No. Label
Voltage
J5-1
VDD
Analog positive power supply, V
DD
;
5.5 V single and dual supply
J5-2
AGND
Analog ground
J5-3
VSS
Analog negative power supply, V
SS
;
−5.5 V dual supply
J6-1
VLOGIC
Digital supply from 1.8 V to V
DD
J6-2
DGND
Digital ground
LINK OPTIONS
Various link options are incorporated in the
EVAL-MBnanoDAC-
SDZ
and must be set for the required operating conditions
before using the board. Table 2 describes the positions of the
links to control the evaluation board via the
SDP-B
board using
a PC and external power supplies. The functions of these link
options are described in detail in Table 4. The positions listed in
Table 2 and Table 4 match the evaluation board imprints (see
Figure 12).
Table 2. Link Options Setup for
SDP-B
Control (Default)
Link Number
Position
REF1
2.5V
REF2
EXT
REF3
EXT
REF4
EXT
LK5
C
LK6
+3V3
LK7
B
DAUGHTER BOARD LINK OPTIONS
The
AD5340
daughter board has a link option. The link
controls whether the reference input of the DAC is buffered or
unbuffered. Table 3 shows how the link is configured.
Table 3. Link Options for Daughter Board
Link Number
Pin
Position
LK1
BUF
A (unbuffered, default)
B (buffered)
Table 4. Link Functions
Link Number
Function
REF1, REF2, REF3, REF4
These links select the reference source.
Position EXT selects an off board voltage reference via the appropriate EXT_REF connector.
Position VDD selects V
DD
as the reference source.
Position 4.096V selects the on-board 4.096 V reference as the reference source.
Position 2.5V selects the on-board 2.5 V reference as the reference source.
Position 5V selects the on-board 5 V reference as the reference source.
LK5
This link selects the positive DAC analog voltage source.
Position A selects the internal voltage source from the
SDP-B
board.
Position B selects the internal voltage source, 3.3 V from the
ADP121
on the motherboard.
Position C selects the external supply voltage, V
DD
.
LK6
This link selects the V
LOGIC
voltage source.
Po3V3 selects the digital voltage source from the
SDP-B
board (3.3 V).
Position VLOGIC selects an external digital supply voltage (V
LOGIC
).
LK7
This link selects the negative DAC analog voltage source.
Position A selects V
SS
.
Position B selects AGND.
