Evaluation Board User Guide
UG-384
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluation Board for the AD5570
16-Bit ±12 V/±15 V Serial Input Voltage Output DAC
FEATURES
EVALUATION BOARD DESCRIPTION
Full-featured evaluation board for the AD5570
Link options
PC control in conjunction with the Analog Devices, Inc.,
system demonstration platform
PC software for control
The EVAL-AD5570SDZ is a full-featured evaluation board that
is designed to allow the user to easily evaluate all features of the
AD5570 voltage output, 16-bit digital-to-analog converter (DAC).
Components on the AD5570 evaluation board include SMB
connectors for interfacing to other equipment, a 5 V voltage
reference, and a ground force sense. Testpoints are provided on
all of the digital interface signal lines for ease of monitoring.
The user has the option of inserting both a resistive and
capacitive load on the output of the AD5570 at C1 and R1.
DEVICE DESCRIPTION
The AD5570 is a single 16-bit serial input, voltage output DAC
that operates from supply voltages of ±11.4 V up to ±16.5 V.
INL and DNL are accurate to 1 LSB (maximum).
The board can be controlled by the system demonstration
platform (SDP) connector (J1). The SDP board allows the
evaluation board to be controlled through the USB port of a
Windows® XP (SP2 or later) or more recent 32-bit or 64-bit
(Vista, Windows 7) PC using the AD5570 evaluation software.
Complete specifications for the AD5570 are provided in the
AD5570 data sheet, available from Analog Devices, and should
be consulted in conjunction with this user guide when using the
evaluation board.
FUNCTIONAL BLOCK DIAGRAM
PC
USB
PORT
EXT
+10V
REFIN
VOUT
AD5570
DGND
AGNDS
AGND
AD8675
Figure 1.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
VOUT
Rev. 0 | Page 1 of 12
10579-001
SYSTEM
DEMONSTRATION
PLATFORM BOARD
UG-384
Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
On-Board Connectors ..................................................................3
Device Description ........................................................................... 1
Evaluation Board Software ...............................................................4
Evaluation Board Description......................................................... 1
Software Installation .....................................................................4
Functional Block Diagram .............................................................. 1
Software Operation .......................................................................4
Revision History ............................................................................... 2
Features of the AD5570 Evaluation Board Software ................5
Evaluation Board Hardware ............................................................ 3
Evaluation Board Schematics and Artwork ...................................6
Power Supplies .............................................................................. 3
Ordering Information .................................................................... 10
Link Options ................................................................................. 3
Bill of Materials ........................................................................... 10
REVISION HISTORY
3/12—Revision 0: Initial Version
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EVALUATION BOARD HARDWARE
POWER SUPPLIES
Default Link Option Setup
The following external supplies must be provided:
The default link options are listed in Table 1.
•
Table 1. Default Link Options
•
+11.4 V to +16.5 V between the VDD and AGND inputs for
the positive analog supply of the AD5570.
−11.4 V to −16.5 V between the VSS and AGND inputs for
the negative analog supply of the AD5570.
The analog and digital planes are connected at one location,
close to the AD5570. To avoid ground loop problems, it is
recommended AGND and DGND not be connected elsewhere
in the system.
Each supply is decoupled to the relevant ground plane with
10 µF and 0.1 µF capacitors. Each device supply pin is also
decoupled with a 10 µF and 0.1 µF capacitor pair to the
relevant ground plane.
Link Number
LK1
LK2
LK3
Option
Inserted
Inserted
Inserted
ON-BOARD CONNECTORS
There are four connectors on the AD5570 evaluation board
PCB as outlined in Table 2.
Table 2. On-Board Connectors
LINK OPTIONS
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 3.
Connector
J1
J5
VOUT
VREF
Function
SDP board connector
Analog power supply connector
DAC output connector
External reference voltage input connector
Table 3. Link Options
Link No.
LK1
LK2
LK3
Description
LK1 is used in conjunction with LK2 to select whether the on-board ground force sense buffer is used.
When LK1 and LK2 are inserted, the ground force sense buffer is not used, the ground pins are connected directly to 0 V, and
the buffer is removed from the ground loop.
When LK1 and LK2 are removed, the ground force sense buffer is used.
This link is used to select the internal or the external reference.
When LK3 is inserted, the on-board reference is selected as the voltage reference source for the AD5570.
When LK3 is removed, an external voltage reference can be applied to Connector VREF.
Rev. 0 | Page 3 of 12
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Evaluation Board User Guide
EVALUATION BOARD SOFTWARE
SOFTWARE INSTALLATION
SOFTWARE OPERATION
The AD5570 evaluation kit includes self-installing software on
a CD. The software is compatible with Windows XP (SP2), Vista,
and Windows 7 (32-bit or 64-bit). If the setup file does not run
automatically, you can run the setup.exe file from the CD.
To launch the software, complete the following steps:
Install the evaluation software before connecting the evaluation
board and SDP board to the USB port of the PC to ensure that
the evaluation system is correctly recognized when connected
to the PC.
2.
1.
After installation from the CD is complete,
10579-002
2.
Power up the AD5570 evaluation board as described in the
Power Supplies section. Connect the SDP board (via either
Connector A or Connector B) to the AD5570 evaluation
board and then to the USB port of your PC using the
supplied cable.
When the evaluation system is detected, proceed through any
dialog boxes that appear. This completes the installation.
Figure 2. Connectivity Error Alert
10579-003
1.
From the Start menu, select Analog Devices > AD5570 >
AD5570 Evaluation Software. The main window of the
software opens (see Figure 3).
If the evaluation system is not connected to the USB port
when the software is launched, a connectivity error is
displayed (see Figure 2). Connect the evaluation board to
the USB port of the PC, wait a few seconds, click Rescan,
and follow the instructions.
Figure 3. Main Window
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Evaluation Board User Guide
UG-384
FEATURES OF THE AD5570 EVALUATION BOARD
SOFTWARE
The software allows the user to control all the functionality of
the AD5570. The main features are as follows:
•
•
•
•
Load DAC register with a 16-bit word and update the
AD5570 output.
Data readback of the contents of the input shift register.
Power down/power up the AD5570.
Clear the AD5570 output to 0 V.
Data Readback
Clicking the READ REGISTER button reads back and displays
the current contents of the DAC register.
Power Down/Power Up
Each of these features is described in the following sections.
Load DAC
In the Input Data field, the user types the 16-bit word to be
programmed to the AD5570 and clicks the WRITE TO DAC
button.
In LDAC synchronous loading mode, the WRITE TO DAC
button writes the required data to the input shift register and
toggles the LDAC signal, which then loads the DAC register
and updates the output voltage.
In LDAC asynchronous loading mode, the WRITE TO DAC
button writes the required data to the input shift register, but
the user toggles the LDAC signal by clicking the LDAC switch
to load the DAC register and update the output voltage.
This function allows the user to place the AD5570 in powerdown mode and to remove the AD5570 from power-down
mode. Clicking the POWER DOWN switch places the AD5570
in power-down mode, at the same time the text on the button
changes to POWER UP, indicating that clicking the button
again removes the AD5570 from power-down mode.
Clear
Clicking the CLEAR switch causes the CLR signal of the
AD5570 to be pulsed low, which has the effect of setting the
output voltage to 0 V.
Rev. 0 | Page 5 of 12
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Evaluation Board User Guide
EVALUATION BOARD SCHEMATICS AND ARTWORK
REFIN
AVDD
LK3
6
VREF
C16
10uF 0.1uF
/LDAC
/SYNC
SCLK
SDI
SDO
C10
VSS
C11
TRIM
GND
LK1
U1
VOUT'
REFIN
VSS
VDD
PD
SDO
DIN
SCLK
SYNC
LDAC
CLR
4
15
2
1
VOUT
9
12
13
16
11
REFGND
REFGND
VOUT
AGND
AGNDS
AD5570
DGND
10
8
7
6
5
4
3
5
C35
0.1uF
/PD
SDO
SDI
SCLK
/SYNC
/LDAC
/CLR
0.1uF
U2
0.1uF
0.1uF
C12
2
ADR425ARZ
C34
AVDD
/PD
+
/CLR
+VIN
VOUT
R1
C1
14
LK2
AVDD
U5
3
AVDD
2
AVDD
C4
0.1uF
7
+
V+
-
V-
6
4 AD8675ARZ
C5
J5-1
C6
+
C7
0.1uF
0.1uF
10uF
VSS
J5-2
AGND
+
C9
0.1uF
10579-004
C8
10uF
VSS
J5-3
VSS
Figure 4. Schematic of the AD5570 Circuitry
BMODE1: PULL UP WITH A 10K RESISTOR TO SET SDP TO BOOT FROM A SPI FLASH ON THE DAUGHTER BOARD
3.3V
J1
/PD
/LDAC
(CONNECTED TO BLACKFIN GPIO - USE I2C_0 FIRST)
USB_VBUS
VIN: USE THIS PIN TO POWER THE SDP REQUIRES 5V 200MA
RESET_IN
BMODE1
UART_RX
UART_TX
GND
GND
NC
NC
SDP
EEPROM_A0
NC
STANDARD
NC
NC
CONNECTOR
NC
NC
NC
NC
GND
GND
NC
NC
NC
NC
TMR_C*
TMR_D
TIMERS
TMR_A
TMR_B
GPIO6
GPIO7
GND
GND
GENERAL
GPIO4
GPIO5
INPUT/OUTPUT
GPIO2
GPIO3
GPIO0
GPIO1
SCL_1
SCL_0
I2C
SDA_1
SDA_0
GND
GND
SPI_SEL1/SPI_SS
SPI_CLK
SPI_SEL_C
SPI_MISO
SPI
SPI_SEL_B
SPI_MOSI
GND
SPI_SEL_A
SPORT_INT
GND
SPORT_DT3 *
SPORT_TSCLK
SPORT_DT2 *
SPORT_DT0
SPORT
SPORT_DT1
SPORT_TFS
SPORT_DR1
SPORT_RFS
SPORT_DR2*
SPORT_DR0
SPORT_DR3*
SPORT_RSCLK
GND
GND
PAR_FS1
PAR_CLK
PAR_FS3
PAR_FS2
PAR_A1
PAR_A0
PAR_A3
PAR_A2
GND
GND
PAR_CS
PAR_INT
PAR_RD
PAR_WR
PAR_D1
PAR_D0
PARALLEL
PAR_D3
PAR_D2
PORT
PAR_D5
PAR_D4
GND
GND
PAR_D7
PAR_D6
PAR_D9
PAR_D8
PAR_D11
PAR_D10
PAR_D13
PAR_D12
PAR_D14
GND
GND
PAR_D15
* PAR_D16
PAR_D17 *
* PAR_D18
PAR_D19 *
* PAR_D20
PAR_D21 *
* PAR_D22
PAR_D23 *
GND
GND
USB_VBUS
VIO(+3.3V)
GND
GND
GND
GND
NC
NC
*NC ON BLACKFIN SDP
VIN
NC
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116
117
118
119
120
BOARD ID EEPROM (24LC32) MUST BE ON I2C BUS 0,
R4
100K
R5
U4
DNP
1
2
3
4
R2
100K
A0
A1
A2
VSS
VCC
WP
SCL
SDA
8
7
6
5
24LC32A-I/MS
/CLR
SCL_0
SDA_0
SCLK
SDO
SDI
/SYNC
MAIN I2C BUS (CONNECTED TO BLACKFIN TWI - PULL UP RESISTORS NOT REQUIRED)
R3
100K
3.3V
VIO: USE TO SET IO VOLTAGE MAX DRAW 20MA
Figure 5. Schematic of the SDP Board Connector
Rev. 0 | Page 6 of 12
3.3V
10579-005
I2C BUS 1 IS COMMON ACROSS BOTH CONNECTORS ON SDP - PULL UP RESISTORS REQUIRED
60
59
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3
2
1
UG-384
10579-006
Evaluation Board User Guide
10579-007
Figure 6. Component Placement Schematic
Figure 7. Top Printed Circuit Board (PCB) Layer Schematic
Rev. 0 | Page 7 of 12
Evaluation Board User Guide
10579-008
UG-384
10579-009
Figure 8. Inner First PCB Layer Schematic
Figure 9. Inner Second PCB Layer Schematic
Rev. 0 | Page 8 of 12
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10579-010
Evaluation Board User Guide
Figure 10. Bottom PCB Layer Schematic
Rev. 0 | Page 9 of 12
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Evaluation Board User Guide
ORDERING INFORMATION
BILL OF MATERIALS
Table 4.
Reference Designator
/CLR, /LDAC, /PD, /SYNC, REFIN,
SCLK, SDI, SDO, USB_VBUS, VOUT'
C1, C4, C5, C7, C9, C10, C11,
C12, C16, C35
C6, C8, C34
J1
J5
LK1, LK2, LK3
Part Description
Testpoint
Part Number
20-313137
Stock Code
FEC 8731144
Gold plated pin receptacles
73007015
Analog Devices 73007015
Capacitor +, Case B, 10 µF, 20 V
120-way connector, 0.6 mm pitch
3-pin terminal block, 5 mm pitch
Jumper block, 2 pins, 0.1" spacing
TAJB106K020RNJ
FX8-120S-SV(21)
CTB5000/3
M20-9990246
R1
R2, R3, R4
R5
U1
Gold plated pin receptacle, 4.7 kΩ
SMD resistor, 100 kΩ
SMD resistor
16-bit ±12 V/±15 V serial input voltage
output DAC
5 V reference
32 kB I2C Serial EEPROM, MSOP8
Single op amp, 8-lead SOIC
Jack SMB, straight
73007015
MC 0.063W 0603 1% 100K
N/A
AD5570BRSZ
FEC 197427
FEC 1324660
FEC 151790
FEC 1022247 and
FEC 150-411
Analog Devices 73007015
FEC 9330402
Not inserted
AD5570BRSZ
ADR425ARZ
24LC32A-I/MS
AD8675ARZ
1-1337482-0
ADR425ARZ
FEC 1331330
AD8675ARZ
FEC 1206013
U2
U4
U5
VOUT, VREF
Rev. 0 | Page 10 of 12
Evaluation Board User Guide
UG-384
NOTES
Rev. 0 | Page 11 of 12
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Evaluation Board User Guide
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 One Technology Way, Norwood, MA 02062, USA. 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.
©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG10579-0-3/12(0)
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