ANALOG DEVICES EVAL-AD5675RARDZ Controller Board User Guide

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:

1. 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.
2. 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.
3. Double-click the board plugin to open the board view shown in Figure 3.
4. 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 WindowFigure 3. Board View of the EVAL- AD5675RARDZ or EVAL-AD5676R2ARDZFigure 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

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 MapFigure 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

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)

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

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 1Figure 9. NanoDAC+ Evaluation Board Schematic Diagram, Power Supply and Signal Routes, Page 2Figure 10. NanoDAC+ Evaluation Board Schematic Diagram, SDP ConnectorFigure 11. NanoDAC+ Evaluation Board Schematic Diagram, PMOD ConnectionFigure 12. NanoDAC+ Evaluation Board, Component PlacementFigure 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. 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 Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or  distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is  NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary  information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the  Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL  PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL.
ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not 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
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References

• Mixed-signal and digital signal processing ICs | Analog Devices
• ACE-Software | Analog Devices
• EVAL-AD5676RARDZ Evaluation Board | Analog Devices

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