Datasheet

EVAL-AD5764EB
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 DGND inputs for the digital
supply of the
AD5764 and digital circuitry. Alternatively,
place Link 1 in Position A to power the digital circuitry
from the USB port (default).
• 12 V to 15 V between the AV
DD
and AGND inputs for the
positive analog supply of the AD5764.
• −12 V to −15 V between the AV
SS
and AGND inputs for the
negative analog supply of the AD5764.
Both AGND and DGND inputs are provided on the board. The
AGND and DGND planes are connected at one location close
to the
AD5764. It is recommended not to connect AGND and
DGND elsewhere in the system to avoid ground loop problems.
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
The position of Link 11 configures the board for either PC
control via the USB port (default setup) or for control by an
external source via J21 or the SMB connectors. The link options
on the evaluation board should be set for the required operating
setup before using the board. The functions of the link options
are described in
Table 4.
.
Default Link Option Setup
The default setup is for control by the PC via the USB port. The
default link options are listed in
Table 1.
Table 1. Link and Switch Options for PC Control
Link No. Option
LK1 A
LK2 C
LK3 Inserted
LK4 B
LK5 A and B inserted
LK6 Removed
LK7 A
LK8 A
LK9 A
LK10 Removed
LK11 B
LK12 Inserted
LK13 Inserted
LK14 Inserted
Connector J21 Pin Descriptions
Table 2. Connector J21
1
Pin Configuration
13 11 9 7 5 3 1
14 12 10 8 6 4 2
1
LK11 must be in Position A to enable the use of J21.
Table 3. Connector J21 Pin Descriptions
Pin No. Function
1
SYNC
2 SCLK
3 SDIN
4 SDO
5
LDAC
6
CLR
7 D0
8 D1
9
RSTOUT
10
RSTIN
11
BIN/
2sCOMP
12 DGND
13 DGND
14 DGND