ANALOG DEVICES EVAL-AD5675RARDZ Controller Board User Guide
- June 1, 2024
- Analog Devices
Table of Contents
User Guide
EVAL-AD5675RARDZ/EVAL-AD5676RARDZ
UG-2148
Evaluating the AD5675R (I²C) or the AD5676R (SPI) Octal, 16-Bit nanoDAC+ with 2 ppm/°C Reference
FEATURES
► Full featured evaluation board for the
AD5675R (I²C) and
AD5676R (SPI)
► Various link options
► PC control in conjunction with the Analog Devices, Inc., EVALSDP-CK1Z
(SDP-K1) controller board
EVALUATION KIT CONTENTS
► EVAL-AD5675RARDZ (I²C) or EVAL-AD5676R2ARDZ (SPI) evaluation board
► AD5675R (I²C) or AD5676R (SPI) device
HARDWARE REQUIRED
► EVAL-SDP-CK1Z (SDP-K1) controller board, which must be purchased separately
SOFTWARE REQUIRED
► Analysis | Control | Evaluation (ACE) Software, which is available for download from the EVAL- AD5675RARDZ (I²C) or EVALAD5676R2ARDZ (SPI) product page
TYPICAL EVALUATION BOARD SETUP
Figure 1. Evaluation Board Connected to the SDP-K1 Controller Board
(EVAL-AD5675RARDZ or EVAL-AD5676R2ARDZ)
GENERAL DESCRIPTION
This user guide details the operation of the EVAL-AD5675RARDZ (I²C) evaluation
board and the EVAL-AD5676R2ARDZ (serial peripheral interface (SPI)) evaluation
board for the AD5675R (TSSOP, I²C) and AD5676R (TSSOP, SPI), respectively,
which are both octal channel, voltage output digital-to-analog converters
(DACs).
The EVAL-AD5675RARDZ and the EVAL-AD5676R2ARDZ evaluation boards are designed
to facilitate quick prototyping of the AD5675R or AD5676R circuits, thereby
reducing design time. Both devices operate from a single 2.7 V to 5.5 V
supply.
Additionally, these devices both have an internal 2.5 V reference. A different
reference voltage (VREF) can be applied via the EXT_REF SMB connector, if
required. While sharing common features, the two DACs differ in their digital
interface protocols. The AD5676R employs SPI, while the AD5675R employs I²C.
The EVAL-AD5675RARDZ and the EVAL-AD5676R2ARDZ evaluation boards interface to
the USB port of a PC via a System Demonstration Platform (SDP) controller
board (EVAL-SDP-CK1Z (SDP-K1)). The Analysis | Control | Evaluation (ACE)
software is available for download from both the EVAL-AD5675RARDZ product page
and the EVAL-AD5676R2ARDZ product page. This software can be used with the
evaluation board to allow the user to program the AD5675R and AD5676R,
respectively. A PMOD connection is also available to allow the connection of
microcontrollers to either evaluation board. Note that when a microcontroller
is used through the PMOD connection, the EVAL-SDP-CK1Z (SDP-K1) must be
disconnected, and the user cannot use the ACE software.
The EVAL-AD5675RARDZ and the EVAL-AD5676R2ARDZ both require the EVAL-SDP-CK1Z
(SDP-K1) controller board, which are available for purchase from Analog
Devices.
For full details on the AD5675R and the AD5676R, see the AD5675R and AD5676R
data sheets, which must be consulted in conjunction with this user guide when
using the EVALAD5675RARDZ or the EVAL-AD5676R2ARDZ evaluation boards.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND
CONDITIONS.
REVISION HISTORY
1/2024—Revision 0: Initial Version
GETTING STARTED
INSTALLING THE SOFTWARE
The EVAL-AD5675RARDZ (I²C) or EVAL-AD5676R2ARDZ (SPI) evaluation boards use
the Analog Devices the Analysis | Control | Evaluation
(ACE) software, a desktop
software application that allows the evaluation and control of multiple
evaluation systems.
The ACE software is available for download from the EVALAD5675RARDZ evaluation
board page or EVAL-AD5676R2ARDZ evaluation board page and must be installed
before connecting the EVAL-SDP-CK1Z (SDP-K1) controller board to the USB port
of the PC to ensure that the EVAL-SDP-CK1Z
(SDP-K1) is recognized when it connects to the PC.
The ACE installer installs the necessary SDP drivers and the Microsoft® .NET
Framework 4 by default.
For full instructions on how to install and use this software, see the ACE
software page on the Analog Devices website.
After the ACE software installation completes and the software is opened, the
EVAL-AD5675RARDZ or EVAL-AD5676R2ARDZ evaluation board plugin appears.
INITIAL SETUP
To set up the EVAL-AD5675RARDZ or EVAL-AD5676R2ARDZ evaluation board, take the
following steps:
- Connect the EVAL-AD5675RARDZ or EVAL-AD5676R2ARDZ to the EVAL-SDP-CK1Z (SDP-K1) controller board and then connect a USB cable between the SDP-K1 and the PC.
- Run the ACE software, and the main window appears as shown in Figure 2. The EVAL-AD5675RARDZ or EVALAD5676R2ARDZ board plugins appear in the Attached Hardware section of the Start tab.
- Double-click the board plugin to open the board view shown in Figure 3.
- Double-click the AD5675R or AD5676R chip to access the chip view as shown in Figure 4. This view provides a basic representation of functionality of the board. See Figure 5 and Table 1 for the details on the main function blocks of the board.
Figure 2. ACE Software Main
Window
Figure 3. Board View of the EVAL-
AD5675RARDZ or EVAL-AD5676R2ARDZ
Figure 4. Chip Block
Diagram View of the AD5675R or AD5676R
BLOCK DIAGRAM AND DESCRIPTION
The EVAL-AD5675RARDZ or EVAL-AD5676R2ARDZ software is organized so that it
appears similar to the functional block diagram shown in the data sheets. In
this way, it is easy to correlate the functions on the board with the
descriptions in the data sheets. A full description of each block, register,
and its settings is given in the
AD5675R or
AD5676R data sheets.
Some of the blocks and their functions are described in this section as they
pertain to the EVAL-AD5675RARDZ and EVALAD5676R2ARDZ.
The block diagram is shown in Figure 5, and Table 1 describes the
functionality of each block.
Figure 5. Block Diagram with Labels
Table 1. Block Diagram Functions
| Label | Button/Function Name | Function |
|---|---|---|
| A | Configuration Summary | This function is used to set up the initial |
configuration for the evaluation board. Select the reference gain from the
Configuration dropdown menu. A gain of 1 is the default. For a gain of 2, an
external supply is needed (VDD = V REF + 1.5 V). After setting up the initial
configuration, click Apply Changes (K) to apply the values. These settings can
be modified at any stage while evaluating the board.
B| LDAC and RESET (GPIO buttons)| The LDAC and RESET buttons act as external
GPIO pulses to the LDAC and RESET pins. The LDAC button transfers data from
the input registers (E) to the DAC registers (F). The RESET button clears all
data from the input registers and DAC registers. These buttons are live;
therefore, there is no need to click Apply Changes (K).
C| Select a Command| The Select a Command dropdown menu controls how the data
transfer to the device affects the input and DAC registers.
When a data value is entered in an input register (E), this menu determines if
the data is transferred to the input register only, or to the channel input
register (E) and channel DAC register (F).
D| Channel page selection| Use the change page display dropdown menu to select
which page of the four DAC channel settings displays.
E| Input register| The function is used to select the 16-bit data-word to
transfer to the device. Then, click Apply Changes (K) to transfer the 16-bit
data-word to the device.
F| DAC register| This box displays the value that is currently present in the
DAC register on the device. Select the appropriate command option or toggle
LDAC (B) to update the DAC register.
G| Software RESET| Click Software RESET to return the evaluation board and
software to their default values. This button is live; therefore, there is no
need to click Apply Changes (K).
H| Load DAC| Click Load LDAC to individually control which channel loads the
values from the input register to the DAC register.
I| DAC| The DAC configuration options provide access to individual channel
configuration options, such as power-down options and hardware LDAC mask
enable and disable settings.
J| Internal Reference| In the Internal Reference area, select Enable from the
dropdown menu to enable the on-chip reference for the evaluation board.
If Disable is selected, an external reference must be applied.
K| Apply Changes| Click Apply Changes to update the device with all the
modified values. However, if there is no evaluation board connected, the input
register value is not transferred to the DAC register.
MEMORY MAP
All registers are fully accessible from the memory map tab. The memory map
allows registers to be edited at a bit level. The bits shaded in dark gray are
read only bits and cannot be accessed from
ACE. All other bits are
toggled. Click Apply Changes to transfer data to the device. All changes here
correspond to the block diagram; for example, if the internal register bit is
enabled, it shows as enabled on the block diagram. Any bits or registers that
are in bold are modified values that have not been transferred to the
evaluation board. After clicking Apply Changes, data is transferred to the
evaluation board.
Figure 6. AD5675R or AD5676R Memory
Map
Figure 7. AD5675R or AD5676R Memory
Map with Pending Changes in DAC0_Input_Register
EVALUATION BOARD HARDWARE
Before applying power and signals to the EVAL-AD5675RARDZ or EVAL-
AD5676R2ARDZ, ensure that all link positions are as required by the operating
mode. The two modes available for operating the evaluation board are SDP
control mode, which must be used with the EVAL-SDP-CK1Z
(SDP-K1), or standalone mode where an external
supply must be provided.
POWER SUPPLIES
The EVAL-AD5675RARDZ and EVAL-AD5676R2ARDZ evaluation boards provide an
on‑board, 3.3 V regulator powered through the USB supply. If the evaluation
board is controlled through a PMOD, or a gain of 2 is required, an external
supply must be provided via the EXT_VDD connectors. See Table 2 and the power
requirements specifications in the
AD5675R or
AD5676R data sheets for
additional details.
Both the AGND and DGND inputs are provided on the board. The AGND and DGND
planes are connected at one location close to the AD5675R or AD5676R. To avoid
ground loop problems, it is recommended that AGND and DGND not be connected
elsewhere in the system. All supplies are decoupled to ground with 10 µF and
0.1 µF capacitors.
Table 2. Power Supply Connectors
| Connector | Label | External Voltage Supplies Description |
|---|
EXT_VDD, Pin 1
EXT_VDD, Pin 2
EXT_VREF, SMB Connector| EXT_VDD
AGND
EXT_VREF| External analog power supply from 2.7 V to 5.5 V, VDD.
Analog ground.
External voltage reference.
LINK OPTIONS
A number of link options are incorporated in the EVAL- AD5675RARDZ or EVAL-
AD5676R2ARDZ evaluation board and must be set for the required operating
conditions before using the board. The link function options are described in
Table 4.
Table 3 lists the positions of the different links controlled by the PC via
the USB port, and an SDP controller board operating in single-supply mode is
required.
Table 3. Link Options Setup for SDP-K1 Control (Default)
| Link | Option |
|---|
VDD_SEL
REF_SEL
VDD_VIO
RSTSEL
GAIN| Position A (1-2)
Position A (1-2)
Disconnected
Position A (1-2)
Position 1-2
Table 4. Link Functions
| Link | Description |
|---|---|
| VDD_SEL | This link selects the DAC analog voltage source. There are two |
options, as follows.
Position A (1-2): This option selects the on-board voltage source
(SDP-K1,
ADP121).
Position B (2-3): This option selects an external supply voltage (EXT_VDD
connector).
REF_SEL| This link selects the DAC voltage reference source:
Position A (1-2): This option selects an external reference source (EXT_VREF
connector).
If no external supply present, it defaults to the internal on-chip reference.
Position B (2-3): This option selects the on-board reference from the
ADR4525
VDD_VIO| This link selects the DAC digital voltage source. There are two
options, as follows.
Connected: shorts VDD and VLOGIC. Only use this option when the SDP-K1
controller board is not connected.
Disconnected: opens the connection of VDD and VLOGIC. Use this option when
using the SDP board.
RSTSEL| The RSTSEL (reset select) link selects the power-on reset state of the
device.
Position A (1-2): This option ties this pin to DAC_VLOGIC and powers up all
DACs to midscale.
Position B (2-3): This option ties this pin to DGND and powers up all DACs to
zero scale.
GAIN| This link sets the internal gain setting of the device.
Position 1-2: This link is the default option, and it selects the control
(GAIN_IO) option, in which, the gain is controlled by the
ACE software using the EVAL-
SDP-CK1Z (SDP-K1).
Position 3-4: This option ties the GAIN pin to DAC_VLOGIC and results in all
DAC outputs having a 0 V to 2 × VREF span.
Position 5-6: This option ties the GAIN pin to DGND and results in all DAC
outputs having a 0 V to V REF span.
EVALUATION BOARD SCHEMATICS
Figure 8. NanoDAC+ Evaluation Board
Schematic Diagram, Power Supply and Signal Routes, Page 1
Figure 9. NanoDAC+ Evaluation Board Schematic Diagram, Power
Supply and Signal Routes, Page 2
Figure 10. NanoDAC+
Evaluation Board Schematic Diagram, SDP Connector
Figure 11. NanoDAC+ Evaluation Board Schematic Diagram, PMOD
Connection
Figure 12. NanoDAC+ Evaluation
Board, Component Placement
Figure 13. NanoDAC+ Evaluation
Board, Top Side Routing
Figure 14. NanoDAC+ Evaluation
Board, Bottom Side Routin’
ORDERING INFORMATION
BILL OF MATERIALS
Table 5. Bill of Materials
Quantity| Reference Designator| Description| Supplier/Part
Number¹
---|---|---|---
1| U1| Octal, 16-bit nanoDAC+ with 2 ppm/°C reference| Analog Devices,
AD5676RBRUZ or
AD5675RBRUZ
1| U2| IC, 32 KBIT serial, electrically erasable programmable read-only memory
(EEPROM)| Generic
1| U3| 150 mA, low quiescent current, complementary metal-oxide semiconductor
(CMOS) linear regulator in 5-lead TSOT or 4-ball WLCSP| Analog Devices,
ADP121-AUJZ33
1| U4| Ultra-low noise, high-accuracy 2.5 V voltage reference| Analog Devices,
ADR4525DEZ
2| AGND, DGND| Connector, printed circuit board (PCB), black test points|
Generic
1| C1| 0.1 μF ceramic capacitor, 16 V, 10%, X7R, 0402, AEC-Q200| Generic
2| C4, C10| 0.1 μF ceramic capacitors, 50 V, 10%, X7R, 0603| Generic
4| C6, C8, C11, C23| 0.1 μF ceramic capacitors, 16 V, 10%, X7R, 0603| Generic
3| C9, C12, C14| 1 μF ceramic capacitors, 16 V, 10%, X7R, 0603| Generic
2| C5, C13| 10 μF ceramic capacitors, 10 V, 20%, X5R, 0603| Generic
1| C2| 10 μF ceramic capacitor, 6.3 V, 20%, X5R, 0603| Generic
1| C3| 4.7 μF ceramic capacitor, 10 V, 20%, X5R, 0603| Generic
1| E1| Inductor, ferrite bead, 600 Ω, 25%, 100 MHz, 2.9 A, 0.038 Ω, 1206,
AEC-Q200| Generic
1| EXT_VDD| Connector, PCB, 2-position terminal block side entry 5 mm pitch|
Generic
1| EXT_VREF| Connector, PCB coax Subminiature Version B (SMB) jack RF vertical
PC mount gold| Generic
6| LDACB, RESETB, SCLK/A0, SDI/A1, SDO/ SDA, SYNCB/SCL| Connector, PCB white
test points| Generic
1| P1| Connector, PCB receptacle 25 mil square post, 2.54 mm pitch| Generic
2| P2, P5| Connector, PCB receptacles 25 mil square post, 2.54 mm pitch|
Generic
1| P3| Connector, PCB BERG header, double straight male, 6-position| Generic
1| P4| Connector, PCB receptacles 25 mil square post, 2.54 mm pitch| Generic
1| R1| 0 Ω resistor, surface-mounted device (SMD), jumper, 1/16 W, 0402|
Generic
3| R8, R9, R12| 100 kΩ resistors, SMD, 1%, 1/16 W, 0603| Generic
8| R33| 0 Ω resistors, SMD, jumper, 1/10 W, 0603| Generic
1| R2| 1.6 Ω resistor, SMD, 1%, 1/5 W, 0603, AEC-Q200| Generic
1| R3| 0 Ω resistor, SMD, jumper, ½ W, 0805, AEC-Q200, pulse proof| Generic
2| R4, R36| 100 kΩ resistors, SMD, 1%, 1/10 W, 0603| Generic
3| REF_SEL, RSTSEL, VDD_SEL| Connector-PCB, high temperature, 3-position, male
headers, unshrouded, single row straight, 2.54 mm pitch, 3.05 mm solder tail|
Generic
11| VDD, VLOGIC, VOUT0, VOUT1, VOUT2, VOUT3, VOUT4, VOUT5, VOUT6, VOUT7, VREF|
Connector-PCB red test points| Generic
1| VDD_VIO| Connector-PCB, header, 1 row, 2 way| Generic
6| R5, R14, R17, R19, R22, R35| 0 Ω resistors, SMD, jumper, 1/10 W, 0603|
Generic, install for EVAL-AD5676R2ARDZ
6| R6, R13, R16, R18, R21, R23| 0 Ω resistors, SMD, jumper, 1/10 W, 0603|
Generic, install for EVAL-AD5675RARDZ
8| R6, R13, R15, R16, R18, R20, R21, R23| 0 Ω resistors, SMD, jumper, 1/10 W,
0603, do not insert (DNI) or do not populate (DNP) for EVAL-AD5676R2ARDZ| Not
applicable
8| R5, R14, R15, R17, R19, R20, R22, R35| 0 Ω resistors, SMD, jumper, 1/10 W,
0603, DNI or DNP for EVAL-AD5675RARDZ| Not applicable
1| R34| 0 Ω resistor, SMD, jumper, 1/10 W, 0603, DNI or DNP for both boards|
Not applicable
1| R32| 100 kΩ resistor, SMD, 1%, 1/10 W, 0603, AEC-Q200, DNI or DNP for both
boards| Not applicable
8| C15 C16, C17, C18, C19, C20, C21, C22| 10 nF ceramic capacitors, 200 V,
10%, X7R, 0805, FLEXITERM®, DNI or DNP for both boards| Not applicable
1| C7| 0.1 μF ceramic capacitor, 16 V, 10%, X7R, 0603, DNI or DNP for both
boards| Not applicable
1| PMOD| Connector, PCB BERG header, straight male, 12-position, DNI or DNP
for both boards| Not applicable
3| R7, R10, R11| 0 Ω resistors, SMD, jumper, 1/10 W, 0603, AEC-Q200, precision
power, DNI or DNP for both boards| Not applicable
8| R24, R25, R26, R27, R28, R29, R30, R31| 1 kΩ resistors, SMD, 1%, 1/8 W,
0805, AEC-Q200, DNI or DNP for both boards| Not applicable
8| VOUT_0, VOUT_1, VOUT_2, VOUT_3, VOUT_4, VOUT_5, VOUT_6, VOUT_7| Connector-
PCB, coax SMB, jack, RF vertical, PC mount gold, DNI or DNP for both boards|
Not applicable
¹Generic indicates that any part with the specified value, size, and rating
can be used.
NOTES
I²C refers to a communications protocol originally developed by Philips
Semiconductors (now NXP Semiconductors).
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.
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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 Board is provided for the sole and
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ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT
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that it will comply with all applicable United States federal laws and
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having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
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apply to this Agreement and is expressly disclaimed.
©2024 Analog Devices, Inc. All rights reserved. Trademarks
and
registered trademarks are the property of their respective owners.
One Analog Way, Wilmington, MA 01887-2356, U.S.A.
Rev. 0 | 16 of 16
Documents / Resources
|
ANALOG DEVICES EVAL-AD5675RARDZ Controller
Board
[pdf] User Guide
EVAL-AD5675RARDZ Controller Board, EVAL-AD5675RARDZ, Controller Board, Board
---|---
References
- Mixed-signal and digital signal processing ICs | Analog Devices
- ACE-Software | Analog Devices
- EVAL-AD5676RARDZ Evaluation Board | Analog Devices