Datasheet

EVAL-AD5754R
Rev. 0 | Page 3 of 12
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The following external supplies must be provided:
• 5 V between the 5 V and 0 V inputs for the digital supply
of the AD5754R and digital circuitry. Alternatively, place
LK6 in Position A to power the digital circuitry from the
USB port (default).
• 5 V to 15 V between the AV
DD
and GND inputs for the
positive analog supply of the AD5754R.
• 0 V to −15 V between the AV
SS
and AGND inputs for the
negative analog supply of the AD5754R.
The analog and digital planes are connected at one location,
close to the AD5754R. To avoid ground loop problems, it is
recommended not to connect AGND and DGND elsewhere in
the system.
Each supply is decoupled to the relevant ground plane with 10 μF
and 0.1 μF capacitors. Each device supply pin is again decoupled
with a 10 μF and 0.1 μF capacitor pair to the relevant ground plane.
LINK OPTIONS
Position LK7 configures the board for either PC control via the
USB port (default setup) or for control by an external source via
J8. Set the link options on the evaluation board for the required
operating setup before using the board. The functions of the link
options are described in Tabl e 4.
Default Link Position Setup
The default setup is for the device to be controlled by the PC via
the USB port. The default link positions are listed in Table 1.
Table 1. Link and Switch Positions for PC Control
Link No. Positions
LK1 A
LK2 Inserted
LK3 Inserted
LK4 Inserted
LK5 Inserted
LK6 B
LK7 A
LK8 B
LK9 B
LK10 Inserted
LK11 Removed
LK12 Removed
LK13 Removed
Connector J8 Pin Descriptions
The pin configuration for J8 is shown in Table 2 . LK7 must be
in Position B to enable the use of J8.Descriptions for the J8 pins
are in Table 3.
Table 2. Connector J8 Pin Configuration
2 4 6 8 10
1 3 5 7 9
Table 3. Connector J8 Pin Descriptions
Pin No. Function
1 SDO
2
BIN/2sCOMP
3 DGND
4
CLR
5 DGND
6
LDAC
7 SDIN
8 DGND
9 SCLK
10
SYNC