Analog Devices EVAL-AD4858FMCZ User manual

User Guide | EVAL-AD4858
UG-2142
Evaluating the AD4858 8-Channel Simultaneous Sampling, 20-Bit 1 MSPS Data Acquisition System
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | 1 of 14
FEATURES
►Full featured evaluation board for the AD4858
►Eight input channels available through SMA connectors
►On-board reference circuit and power supplies
►Standalone capability through FMC connector and/or test points
►PC software for control and data analysis of the time and fre-
quency domain
►ZedBoard-compatible
►Compatible with other FMC controller boards
EQUIPMENT NEEDED
►PC running Windows® 10 operating system or higher
►Digilent ZedBoard with 12 V wall adapter power supply
►Precision signal source
►SMA cables (inputs to evaluation board)
►USB cable
SOFTWARE NEEDED
►ACE evaluation software
►AD4858 ACE plugin from plug-in manager
GENERAL DESCRIPTION
The EVAL-AD4858FMCZ is designed to demonstrate the perform-
ance of the AD4858 and provide access to many included configu-
ration options that are accessed via an easy to use ACE plug-in
graphical interface. The AD4858 is a fully buffered, 8-channel simul-
taneous sampling, 20-bit, 1 MSPS data acquisition system (DAS)
with differential, wide common mode range inputs.
The EVAL-AD4858FMCZ on-board components include also the
following:
►The LTC6655 high precision, low drift, 4.096 V voltage reference
(not used by default)
►The LT1761, low noise, 1.8 V, 2.5 V, and 5 V low dropouts
(LDOs)
►The LT8330 low quiescent current (IQ) boost converter
For full details on the AD4858, see the AD4858 data sheet, which
must be consulted in conjunction with this user guide when using
the EVAL-AD4858FMCZ.
EVALUATION BOARD KIT CONTENTS
►EVAL-AD4858FMCZ evaluation board
►Micro-SD memory card (with adapter) containing system board
boot software and Linux OS
EVALUATION BOARD PHOTOGRAPH
Figure 1. Evaluation Board Photograph

User Guide EVAL-AD4858
TABLE OF CONTENTS
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Features................................................................ 1
Equipment Needed................................................1
Software Needed...................................................1
General Description...............................................1
Evaluation Board Kit Contents...............................1
Evaluation Board Photograph................................1
Quick Start Guide.................................................. 3
Evaluation Board Hardware...................................4
Hardware Link Options.......................................4
Connectors and sockets.....................................6
Power Supplies.................................................. 6
Reference Circuit................................................6
Evaluation Board Software.................................... 7
Software Installation Procedure......................... 7
ACE Software Operation....................................... 9
Launching the Software......................................9
Analysis View..................................................... 9
Evaluation Board Schematic and Artwork........... 11
REVISION HISTORY
10/2023—Revision 0: Initial Version

User Guide EVAL-AD4858
QUICK START GUIDE
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1. Download and install the ACE Software tool from the ACE
download page, as per the Installing the ACE Evaluation Soft-
ware section. If ACE is already installed, make sure you have
the latest version by using Check For Updates option in the
ACE sidebar, as shown in Figure 2.
Figure 2. Check For Updates Option in the ACE Sidebar
2. Run the ACE software and select Plug-in Manager from the
ACE sidebar to install the board plug-in that supports the
product evaluation board and select Available Packages, as
shown in Figure 3. You can use the search field to help filter the
list of boards to find the relevant one. An ACE quickstart guide
is available here at ACE Quickstart - Using ACE and Installing
Plug-ins.
Figure 3. Plug-in Manager Option in the Sidebar
3. Insert the SD card into the SD card slot on the underside of
the ZedBoard. If there is a need to reimage or create a new
SD card, instructions are available at the following website: ADI
Kuiper Linux with support for ACE Evaluation.
4. Ensure the ZedBoard boot configuration jumpers are set to use
the SD card as shown in Figure 4. To avoid potential damage,
ensure the VADJ SELECT jumper is set to the correct voltage
for the EVAL-AD4858FMCZ.
Figure 4. ZedBoard Boot Configuration Jumpers
5. Connect the AD4858 evaluation board to the FMC connector on
the ZedBoard.
6. Connect the USB cable from the PC to the J13/USB OTG port,
and connect the 12 V power supply to J20/DC input.
7. Slide the SW8/POWER switch in the ZedBoard to the on
position. The green LD13/POWER LED turns on and is followed
by the blue LD12/DONE LED (within the ZedBoard). The DS1
LED in the EVAL-AD4858FMCZ will also turn on.
8. The red LD7 LED blinks approximately 20 to 30 seconds later,
indicating the boot process is complete.
9. Launch the ACE software from the Analog Devices folder in
the Windows Start menu. The evaluation board appears on the
ACE Start tab in the Attached Hardware view.

User Guide EVAL-AD4858
EVALUATION BOARD HARDWARE
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The AD4858 is a fully buffered, 8-channel simultaneous sampling,
20-bit 1 MSPS DAS with differential, wide common mode range
inputs. The AD4858 has an on-chip low drift 4.096 V internal volt-
age reference, but, optionally, it also accepts an external reference
applied through the REFIO pin and provided on-board (LTC6655).
The device operates from different power rails, provided through
on-board LDOs as described in Power Supplies section. An option
to connect external supplies exists and is explained in Table 1.
HARDWARE LINK OPTIONS
Table 1 details the link option functions and the default power link
options. The EVAL-AD4858FMCZ can be powered from different
sources, as described in the Power Supplies section. By default,
the power supply required for the EVAL-AD4858FMCZ comes from
the ZedBoard controller board. The power supply is regulated by
the on-board regulators that generate the required bipolar supplies.
Table 1. Jumper Details with Factory Default Setting
Link Default Position Function
JODIFF to J7DIFF Not inserted Offset Calibration Jumper. Inserting the JODIFF to J7DIFF jumper link allows short-circuiting the corresponding pair of
inputs in order to measure the AD4858 offset and/or perform and offset calibration.
J0+ to J7+ Not inserted Analog Input to Ground Connection. Insert the J0+ to J7+ jumper link to connect to the AGND pin, the corresponding
positive analog input.
J0− to J7− Not inserted Analog Input to Ground Connection. Insert the J0− to J7− jumper link to connect to the AGND pin, the corresponding
negative analog input.
JV12V A The JV12V link selects the power supply source for the evaluation board.
In Position A, the unregulated supply to the on-board LDOs is taken from the ZedBoard 12 V supply.
In Position B, the unregulated external supply to the on-board LDOs is taken from the V12V_EXT connector.
JSHIFT A The JSHIFT link selects the power supply type for the AD4858.
In position A, the VCC pin = +24 V and the VEE pin = −24 V.
In position B, the VCCpin = +44 V and the VEE pin = −4 V.
If not inserted, the VCC pin = +24 V and the VEE pin = −4 V.
JVCC A The JVCC link selects the VCC pin supply source.
In position A, the VCC pin is provided by the on board LT8330 DC/DC converter.
In position B, the VCC pin is provided though VCC_EXT connector.
JVEE A The JVEE link selects the VEE pin supply source.
In position A, the VEE pin is provided by the on board LT8330 DC-to-DC converter.
In position B, the VEE pin is provided though VEE_EXT connector.
JVDDH A The JVDDH link selects the VDDH pin supply source.
In position A, the VDDH pin is provided by the on board LT1761 2.5 V LDO.
In position B, the VDDH pin is provided though VDDH_EXT connector.
If not inserted, VDDH pin can be tied to the AGND pin by inserting an R40 resistor. To disable the internal LDO, tie the VDDH
pin to the GND pin. With the regulator disabled, connect the VDDL pin to an external supply in the range of 1.71 V to 1.89 V
through the JVDDL link.
JVDD A The JVDD link selects the VDD pin supply source.
In position A, the VDD pin is provided by the on board LT1761 5 V LDO.
In position B, the VDD pin is provided though VDD_EXT connector.
JVDDL Not inserted The JVDDL link selects the VDDL pin supply source.
In position A, the VDDL pin is provided by the on-board LT1761 1.8 V LDO. To use this configuration, tie the VDDH pin to
ground through the JVDDH link.
In position B, the VDDL pin is provided though the VDDL_EXT connector. To use this configuration, tie the VDDH pin to
ground through the JVDDH link.
If not inserted, the internal LDO is used for the JVDDH link to be in position A or B.
JVIO Not inserted The JVIO link selects the VIO pin supply source. If not inserted, the VIO pin is taken from the ZedBoard (default).
Alternatively, the VIO pin can be supplied from either the on-board LDOs or an external supply.
In position A, the VIO pin is provided by the on board LT1761 LDO with an output voltage dependent on the JVIO_LDO link.
The R66 resistor (shown in Figure 20) is unsoldered.
In position B, the VIO pin is provided though VIO_EXT connector. The R66 resistor is unsoldered.
Note the field programmable gate array (FPGA) image provided works at 2.5 V digital level, so use caution when changing
the default position of the JVIO link jumper.

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EVALUATION BOARD HARDWARE
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Table 1. Jumper Details with Factory Default Setting (Continued)
Link Default Position Function
JVIO_LDO Not inserted The JVIO_LDO link selects the LT1761 LDO output voltage when the JVIO link is in position B.
Inserted, the LT1761 output voltage is 3.3 V.
Not inserted, the LT1761 output voltage is 1.8 V.

User Guide EVAL-AD4858
EVALUATION BOARD HARDWARE
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CONNECTORS AND SOCKETS
The connectors and sockets on the EVAL-AD4858FMCZ are out-
lined in Table 2.
Table 2. On-Board Connectors
Connector Function
SMA0+ to SMA7+ Positive analog input subminiature version A (SMA) to
Channel 0 through Channel 7
SMA0− to SMA7− Negative analog input SMA to Channel 0 through Channel 7
P1 FPGA mezzanine card (FMC) connector
POWER SUPPLIES
The ZedBoard supplies 12 V to power the rails for the different
components on the EVAL-AD4858FMCZ. The AD4858 uses the
following five power supply pins:
►Positive high voltage power supply ( the VCC pin)
►Negative high voltage power supply (the VEE pin)
►Low voltage power supply (the VDD pin)
►1.8 V power supply (the VDDL pin)
►Digital power supply (the VIO pin)
A combination of the LT8330 DC-to-DC converter and the LT1761
LDO generate all the needed supply rails on the board.
Table 3. Default Power Supplies Available in EVAL-AD4858FMCZ
Power Supply (V) Function Component
+24 VCC LT8330
−24 VEE LT8330
+2.5 VDDH LT1761
+5 VDD LT1761
+1.8 VIO LT1761
REFERENCE CIRCUIT
By default, the AD4858 in the EVAL-AD4858FMCZ uses the in-
ternal low noise, low drift (10 ppm/°C maximum), temperature
compensated bandgap reference that is factory trimmed to 4.096 V
and the internal reference buffer.
As an optional alternative, anLTC6655 high precision, low drift (2
ppm/°C maximum), 4.096 V voltage reference is also provided. This
external reference can be used in two different configurations, as
explained in the AD4858 data sheet and as follows:
►External reference with internal buffer. For this configuration,
connect the external reference to the REFIO pin and populate
the resistor R62 shown in Figure 20.
►External reference with disabled internal buffer. For this configu-
ration, connect the external reference to the REFBUF pin and
populate the resistor R46 shown in Figure 20 , and also connect
the REFIO test point to ground.

User Guide EVAL-AD4858
EVALUATION BOARD SOFTWARE
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SOFTWARE INSTALLATION PROCEDURE
Download the ACE evaluation software from the EVAL-
AD4858FMCZ evaluation kit page. Install the software on a PC
before using the EVAL-AD4858FMCZ kit. Download the AD4858
ACE plug-in from the EVAL-AD4858FMCZ page or from the plug-in
manager in ACE.
Perform the following steps to complete the installation process:
1. Install the ACE evaluation software.
2. Install the AD4858 plug-in. The ACE Quickstart page shows the
plug-in installation guide.
Warning
Install the ACE software before connecting the EVAL-
AD4858FMCZ and ZedBoard to the PC's USB port to ensure that
the evaluation system is properly recognized when it is connected.
Installing the ACE Evaluation Software
To install the ACE evaluation software, take the following steps:
1. Download the ACE software to a Windows-based PC.
2. Double click the ACEInstall.exe file to begin the installation.
By default, the ACE software is saved to the following location:
C:\Program Files (x86)\Analog Devices\ACE.
3. A dialog box opens asking for permission to allow the program
to make changes to the PC. Click Yes to start the installation
process.
4. In the ACE Setup window, click Next > to continue the installa-
tion.
Figure 5. Evaluation Software Install Confirmation
5. Read the software license agreement and click I Agree.
Figure 6. License Agreement
6. Click Browse... to choose the installation location and then click
Next > .
Figure 7. Choose Install Location Window
7. The ACE software components to install are preselected. Click
Install .
Figure 8. Choose Components
8. The Windows Security window opens . Click Install. No action
is required.

User Guide EVAL-AD4858
EVALUATION BOARD SOFTWARE
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Figure 9. Windows Security Window
9. The installation is in progress. No action required.
Figure 10. Installation in Progress
10. When the installation completes, click Next > , and then click
Finish.
Figure 11. Installation complete
Disconnecting the EVAL-AD4858FMCZ
Always disconnect power from the ZedBoard, through the SW8/
POWER switch, before disconnecting the EVAL-AD4858FMCZ from
the FMC connector.

User Guide EVAL-AD4858
ACE SOFTWARE OPERATION
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LAUNCHING THE SOFTWARE
To start the ACE evaluation software, open the Windows Start
menu and click Analog Devices > ACE. The software window con-
tinues loading until the software recognizes the AD4858 evaluation
board. When the software recognizes the board, double-click on the
icon in the Start view to open the main window seen in Figure 12.
For more detailed information about ACE, refer to the ACE user
guide (Analysis | Control | Evaluation - ACE Software).
Note the Power yellow LED (LD13) and the Done blue LED (LD12)
are turned on.
Figure 12. Board View
Chip View
Hover over the AD4858 symbol in the Board View and double click
to enter the Chip View (Figure 13).
Figure 13. Chip View
In this view, you can configure the AD4858 per channel SoftSpan ,
offset, gain, and phase values by left or right clicking the dark blue
symbols (see Figure 14 and Figure 15) by choosing the appropriate
field from a drop-down window.
Figure 14. Setting the Per Channel SoftSpan Range
Figure 15. Setting the Per Channel Offset, Gain and Phase
Selecting the Configure Channels button allows for a global con-
figuration of the channel settings while the Proceed to Memory
Map radio button allows direct access and programing of the
AD4858 memory registers. Note that the Apply Changes button
must be selected each time a setting is changed to take effect.
ANALYSIS VIEW
Click Proceed to Analysis to navigate to the AD4858 Analysis
window. From here, choose the type of analysis to be performed
by selecting the Waveform tab, the FFT tab, or the Histogram tab.
Select options for Run Once or Run Continuous to begin captur-
ing data which will appear in the Results section and Waveform
plot window. Select channel results to be displayed in Displayed
Channels section (default is display all).
Waveform Tab
The Waveform tab displays data in the form of time vs. discrete
data values with the results, as shown in Waveform Tab.

User Guide EVAL-AD4858
ACE SOFTWARE OPERATION
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Figure 16. Waveform Tab
The Waveform graph shows each successive sample of the
AD4858 output. The user can zoom in on and pan over the Wave-
form graph using the embedded waveform tool bar located above
the graph. Select the channels to display in the Display Channels
section.
Under the Display Units pull-down menu, select Codes above the
Waveform graph to select whether the Waveform graph displays in
units of Codes, Hex, or Volts. The axis controls are dynamic.
FFT tab
The FFT tab displays fast Fourier transform (FFT) information for
the last batch of samples gathered (see Figure 17).
When performing an FFT analysis, the RESULTS pane shows
the noise and distortion performance of the AD4858. The sig-
nal-to-noise ratio (SNR) and other noise performance measure-
ments, such as the signal-to-noise-and-distortion (SINAD), Dynam-
ic Range, noise density (Noise/Hz), and peak harmonic or spuri-
ous noise (SFDR), are shown in the Results section. The total
harmonic disturbance (THD) measurements, as well as the major
harmonics contributing to the THD performance, are shown as well.
Figure 17. FFT Analysis of a 200 Hz Sine Wave at 1 MSPS
Histogram Tab
The Histogram tab contains the histogram graph and the RE-
SULTS pane, as shown in Figure 18.
The RESULTS pane displays the information related to the DC
performance.
The Histogram graph displays the number of hits per code within
the sampled data. Use this graph for DC analysis as it indicates the
noise performance of the device.
Figure 18. Histogram Tab

User Guide EVAL-AD4858
EVALUATION BOARD SCHEMATIC AND ARTWORK
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Figure 19. Analog Inputs Schematic

User Guide EVAL-AD4858
EVALUATION BOARD SCHEMATIC AND ARTWORK
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Figure 20. Power Solution Schematic

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EVALUATION BOARD SCHEMATIC AND ARTWORK
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Figure 21. FMC Connection Schematic

User Guide EVAL-AD4858
NOTES
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary
protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of
functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and
conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the
Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you
(“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation
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