EVAL-ADAQ23875FMCZ
User Guide
UG-1896
Rev. 0 | Page 15 of 26
TROUBLESHOOTING
The
SDP-H1
board is the communication link between the PC
and the EVAL-ADAQ23875FMCZ. Figure 2 shows a diagram
of the connections between the EVAL-ADAQ23875FMCZ and
the
SDP-H1
board.
To ensure that the evaluation system is correctly recognized
when it is connected to the PC, install the
ACE
software and the
SDP-H1
driver before connecting the EVAL-ADAQ23875FMCZ
and the
SDP-H1
board to the USB port of the PC.
When the software installation is complete, set up the EVAL-
ADAQ23875FMCZ and the
SDP-H1
board as described in the
following sections.
CONNECTING THE EVAL-ADAQ23875FMCZ AND
THE
SDP-H1
TO THE PC
To connect the EVAL-ADAQ23875FMCZ and the
SDP-H1
board to the PC, take the following steps:
1.
Ensure that all configuration links are in the appropriate
positions, as described in Table 1.
2.
Connect the EVAL-ADAQ23875FMCZ securely to the
160-way connector on the
SDP-H1
board. The EVAL-
ADAQ23875FMCZ does not require an external power
supply adapter.
3.
Connect the
SDP-H1
board to the PC via the USB cable
enclosed in the
SDP-H1
kit. Refer to Figure 2.
VERIFYING THE BOARD CONNECTION
To verify the board connection, take the following steps:
1.
Allow the found new hardware wizard to run after the
SDP-
H1
board is plugged in to the PC. If using Windows XP®,
search for the
SDP-H1
drivers. Choose to automatically
search for the drivers for the
SDP-H1
board if prompted by
the operating system.
4.
A dialog box may appear asking for permission to allow
the program to make changes to the computer. In this
case, click
Yes
. The
Computer Management
window
opens.
5.
Under
System Tools
, click
Device Manager
and use the
Device Manager
window to ensure that the EVAL-
ADAQ23875FMCZ is connected to the PC properly.
6.
If the
SDP-H1
driver software is installed and the board is
connected to the PC properly,
Analog Devices SDP-H1
appears under
ADI Development Tools
in the
Device
Manager
window, as shown in Figure 19.
Figure 19. Windows Device Manager
DISCONNECTING THE EVAL-ADAQ23875FMCZ
Always remove power from the
SDP-H1
board or click the reset
tact switch located along the mini USB port before disconnecting
the EVAL-ADAQ23875FMCZ from the
SDP-H1
board.
BOARD LAYOUT GUIDELINES
The printed circuit board (PCB) layout is critical for preserving
signal integrity and achieving the expected performance from
the
ADAQ23875
. A multilayer board with an internal, clean
ground plane in the first layer beneath the
ADAQ23875
is
recommended. Care must be taken with the placement of
individual components and routing of various signals on the
board. It is highly recommended to route input and output signals
symmetrically. Solder the ground pins of the
ADAQ23875
directly
to the ground plane of the PCB using multiple vias. Remove the
ground and power planes under the analog input/output and
digital input/output pins of the
ADAQ23875
(including F1 and
F2) to avoid undesired parasitic capacitance. Any undesired
parasitic capacitance may impact the distortion and linearity
performance of the
ADAQ23875
.
The pinout of the
ADAQ23875
eases layout and allows the
analog signals on the left side and the digital signals on the right
side. The sensitive analog and digital sections must be separated
on the PCB while keeping the power supply circuitry away
from the analog signal path. Fast switching signals, such as
CNV± or CLK±, and the DA± and DB± digital outputs must
not run near or cross over analog signal paths to prevent noise
coupling to the
ADAQ23875
.
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