Evaluation Board for Quad, 16-Bit, Serial Input, Unipolar/Bipolar Voltage Output DAC EVAL-AD5754R FEATURES DEVICE DESCRIPTION Full-featured evaluation board for the AD5754R On-board reference Link options Direct hook-up to USB port of PC PC software for control The AD5754R is a quad-channel, 16-bit serial input, voltage output digital-to-analog converter that operates from single supply voltages of +4.5 V up to +16.5 V, or dual supply voltages of ±4.5 V up to ±16.5 V. Nominal full-scale output range is software-selectable from the options of +5 V, +10 V, +10.8 V, ±5 V, ±10 V, and ±10.8 V. Provided on the AD5754R are integrated output amplifiers, reference buffers, and proprietary power-up/power-down control circuitry. EVALUATION BOARD DESCRIPTION The EVAL-AD5754R is a full-featured evaluation board, designed to allow the user to easily evaluate all features of the AD5754R quad-channel, 16-bit DAC. All of the AD5754R pins are accessible at on-board connectors for external connection. The board can be controlled by two means, via the on-board connector (J8) or via the USB port of a Windows®-based PC using the AD5754R evaluation software. The default setup is for control via the USB port. The AD5754R offers guaranteed monotonicity, integral nonlinearity (INL) of ±16 LSB maximum, low noise, 10 μs settling time, and an on-chip +2.5 V, 5ppm/°C reference. Complete specifications for the AD5754R are available in the AD5754R data sheet available at www.analog.com, and should be consulted in conjunction with this data sheet when using the evaluation board. FUNCTIONAL BLOCK DIAGRAM POWER SUPPLY INPUTS USB CONNECTOR EXT REF 2.5V VOLTAGE REFERENCE REFIN/REFOUT AD5754R QUAD 16-BIT DAC CONTROLLER CY7C68013 VOUTA VOUTB VOUTC I/O VOUTD SELECT ADC 06534-001 PIN HEADER (J8) Figure 1. Rev. 0 Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Analog Devices reserves the right to change devices or specifications at any time without notice. Trademarks and registered trademarks are the property of their respective owners. Evaluation boards are not authorized to be used in life support devices or systems. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved. EVAL-AD5754R TABLE OF CONTENTS Features .............................................................................................. 1 Evaluation Board Software ...............................................................5 Evaluation Board Description......................................................... 1 Installing the Software ..................................................................5 Device Description ........................................................................... 1 Using the Software ........................................................................5 Functional Block Diagram .............................................................. 1 Evaluation Board Schematics and Artwork ...................................7 Revision History ............................................................................... 2 Ordering Information .................................................................... 10 Evaluation Board Hardware ............................................................ 3 Bill of Materials ........................................................................... 10 Power Supplies .............................................................................. 3 Ordering Guide .......................................................................... 11 Link Options ................................................................................. 3 ESD Caution................................................................................ 11 REVISION HISTORY 5/09—Revision 0: Initial Version Rev. 0 | Page 2 of 12 EVAL-AD5754R EVALUATION BOARD HARDWARE POWER SUPPLIES Default Link Position Setup The following external supplies must be provided: The default setup is for the device to be controlled by the PC via the USB port. The default link positions are listed in Table 1. • 5 V between the 5 V and 0 V inputs for the digital supply of the AD5754R and digital circuitry. Alternatively, place LK6 in Position A to power the digital circuitry from the USB port (default). • 5 V to 15 V between the AVDD and GND inputs for the positive analog supply of the AD5754R. • 0 V to −15 V between the AVSS and AGND inputs for the negative analog supply of the AD5754R. The analog and digital planes are connected at one location, close to the AD5754R. To avoid ground loop problems, it is recommended not to connect AGND and DGND 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 again decoupled with a 10 μF and 0.1 μF capacitor pair to the relevant ground plane. LINK OPTIONS Table 1. Link and Switch Positions for PC Control Link No. LK1 LK2 LK3 LK4 LK5 LK6 LK7 LK8 LK9 LK10 LK11 LK12 LK13 Positions A Inserted Inserted Inserted Inserted B A B B Inserted Removed Removed Removed Connector J8 Pin Descriptions Position LK7 configures the board for either PC control via the USB port (default setup) or for control by an external source via J8. Set the link options on the evaluation board for the required operating setup before using the board. The functions of the link options are described in Table 4. The pin configuration for J8 is shown in Table 2. LK7 must be in Position B to enable the use of J8.Descriptions for the J8 pins are in Table 3. Table 2. Connector J8 Pin Configuration 2 1 4 3 6 5 8 7 Table 3. Connector J8 Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 Rev. 0 | Page 3 of 12 Function SDO BIN/2sCOMP DGND CLR DGND LDAC SDIN DGND SCLK SYNC 10 9 EVAL-AD5754R Table 4. Link Options Link No. LK1 LK2 LK3 LK4 LK5 LK6 LK7 LK8 LK9 LK10 LK11 LK12 LK13 Function This link selects the voltage reference source: Position A selects the on-board REF192 as the voltage reference source. Position B selects an external source via connector J2. (If the AD5754R internal reference is to be used as the voltage reference source, do not insert LK1). This link connects the VOUTA output of the AD5754R to the VIN0 input of the on-board ADC (AD7323): When inserted, the voltage at the VOUTA pin can be read back to the PC. When removed, the voltage at the VOUTA pin is disconnected from the on-board ADC input. This link connects the VOUTB output of the AD5754R to the VIN1 input of the on-board ADC (AD7323): When inserted, the voltage at the VOUTB pin can be read back to the PC. When removed, the voltage at the VOUTB pin is disconnected from the on-board ADC input. This link connects the VOUTC output of the AD5754R to the VIN2 input of the on-board ADC (AD7323): When inserted, the voltage at the VOUTC pin can be read back to the PC. When removed, the voltage at the VOUTC pin is disconnected from the on-board ADC input. This link connects the VOUTD output of the AD5754R to the VIN3 input of the on-board ADC (AD7323): When inserted, the voltage at the VOUTD pin can be read back to the PC. When removed, the voltage at the VOUTD pin is disconnected from the on-board ADC input. This link selects the 5 V power supply source for the digital circuitry: Position A selects the USB port as the 5 V digital circuitry power supply source. Position B selects J7 as the 5 V digital circuitry power supply source. This link selects whether the AD5754R evaluation board is controlled by the PC via the USB port or by an external source via J8: Position A selects the evaluation board to be controlled by the PC via the USB port. Position B selects the evaluation board to be controlled by an external source via J8. This link selects the digital supply voltage value for the AD5754R and the on-board ADC (AD7323): Position A selects 5 V as the supply value. Position B selects 3.3 V as the supply value. This link selects the negative supply voltage: Position A selects 0 V as the negative supply voltage (unipolar operation). Position B selects the AVSS connection of J9 as the negative supply voltage (bipolar operation). This link connects the voltage reference input of the on-board ADC to the selected voltage reference source. This link sets the state of the LDAC pin (LK7 must be in Position B): When inserted, the LDAC pin is tied to 0 V. When removed, the LDAC pin is pulled to DVCC through a 10 kΩ resistor. This link sets the state of the CLR pin (LK7 must be in Position B): When inserted, the CLR pin is tied to 0 V. When removed, the CLR pin is pulled to DVCC through a 10 kΩ resistor. This link sets the state of the BIN/2sCOMP pin (LK7 must be in Position B): When inserted, the BIN/2sCOMP pin is tied to 0 V. When removed, the BIN/2sCOMP pin is pulled to DVCC through a 10 kΩ resistor. Rev. 0 | Page 4 of 12 EVAL-AD5754R EVALUATION BOARD SOFTWARE INSTALLING THE SOFTWARE USING THE SOFTWARE The AD5754R evaluation kit includes self-installing software on a CD. The software is compatible with Windows 2000/NT/XP. If the setup file does not run automatically, setup.exe can be run from the CD. 1. Install the evaluation software before connecting the evaluation board to the USB port of the PC to ensure that the evaluation board is correctly recognized when connected to the PC. After the installation from the CD is complete, power up the AD5754R evaluation board as described in the Power Supplies section. Then, connect it to the USB port of your PC using the supplied cable. 2. When the evaluation board is detected, proceed through any dialog boxes that appear. This completes the installation. Figure 2 displays the main window. This window is divided into six sections: Input Register, Control Register, Power Control Register, Hardware Configuration, Program output Voltage and On-Board ADC. 06534-002 1. 2. To launch the software, select the AD5754R submenu from the Analog Devices menu. Click AD5754R Evaluation Software. Figure 2. Main Window Rev. 0 | Page 5 of 12 EVAL-AD5754R Input Register Program Output Voltage The Input Register section displays the current contents of the input register; the 24-bit display is updated each time you instruct a read or a write operation. This section allows you to program/read the data registers of the four DAC channels. A drop-down box allows you to select hexadecimal or binary coding. To program a data register, click one of the 16 text boxes (4 text boxes per DAC channel). The value in the textbox is programmed to the data register; if a new value is typed into a text box, this value can be programmed to the data register by pressing the Enter key. The DAC output updates if the LDAC pin is low or if the Pulse LDAC After data write check box is checked. This section also allows you to select the output voltage range for each DAC channel. Control Register The Control Register section allows you to program and read the contents of the control register. The control register consists of four bits: TSD enable, clamp enable, CLR select, and SDO disable. Each of these bits is controlled by a toggle button, which sets the bit high or low; a high bit is indicated by the button turning blue, while a low bit is indicated by the button turning white. The control register also contains two functions, CLEAR and LOAD, both of which can be asserted by clicking the appropriate button. Power Control Register The Power Control Register section allows you to program and read the contents of the power control register. The power control register consists of 10 bits: five read/write bits (PUA, PUB, PUC, PUD, PUREF) and five read only bits (TSD, OCA, OCB, OCC, and OCD). Hardware Configuration The Hardware Configuration section lets you configure the hardware setup of the AD5754R, that is, to set the configuration of the CLR, LDAC and BIN/2sCOMP pins. On-Board ADC The AD5754R evaluation board is equipped with an on-board ADC to facilitate measurement and readback of the output voltages of each DAC channel. At any time, click Measure Output Voltages to display the four output voltages. The on-board ADC has a maximum input voltage range of ±10 V. Resolution For the purposes of evaluating the 12-bit (AD5724R) or 14-bit (AD5734R) versions of the AD5754R, the board can be operated at 12 or 14 bits of resolution by selecting the appropriate menu item from the Resolution drop-down menu on the menu bar. Rev. 0 | Page 6 of 12 EVAL-AD5754R EVALUATION BOARD SCHEMATICS AND ARTWORK 06534-004 Figure 3. Schematic of Controller Circuitry Rev. 0 | Page 7 of 12 EVAL-AD5754R 06534-003 Figure 4. Schematic of AD5754R Circuitry Rev. 0 | Page 8 of 12 06534-005 EVAL-AD5754R 06534-006 Figure 5. Component Placement Drawing 06534-007 Figure 6. Solder Side PCB Drawing Figure 7. Component Side PCB Drawing Rev. 0 | Page 9 of 12 EVAL-AD5754R ORDERING INFORMATION BILL OF MATERIALS Table 5. Qty 12 2 7 1 2 2 13 1 1 1 5 1 1 1 4 1 8 15 1 1 1 1 Reference Designator R1 to R7, R12 to R15, R18 R16, R17 R19 to R22, R26 to R28 R23 R24, R25 C19, C56 C6, C12, C14, C35, C36, C37, C41 to C44, C49, C50, C54 C31 C32, C33 C7 to C11, C13, C15, C18, C20 to C30, C34, C38 to C40, C45, C51, C52, C53, C55, C57 Y2 D1 J1 J2 to J6 J7 J8 J9 LK1, LK7, LK8, LK9 LK6 LK2 to LK5, LK10 to LK13 TP1 to TP15 U1 U2 U3 U4 1 1 2 U5 U6 U7, U8 1 2 29 Description 0 Ω resistor, 0603 package 100 kΩ resistor, 0603 package 10 kΩ resistor, 0603 package 1 kΩ resistor, 0603 package 2.2 kΩ resistor, 0603 package 10 μF tantalum capacitor, TAJ_A package 10 μF tantalum capacitor, TAJ_B package Supplier/Number FEC 9331662 FEC 9330402 FEC 9330399 FEC 9330380 FEC 9330810 FEC 1135234 FEC 197427 2.2 μF ceramic capacitor, 0603 package 22 pF ceramic capacitor, 0603 package 0.1 μF ceramic capacitor, 0603 package FEC 9402098 FEC 722005 FEC 9406140 24 MHz crystal LED, 0805 package USB-Mini-B Subminiature BNC connector (SMB) 2-way screw terminal 10-pin dil header 3-way screw terminal 3-pin sil header and shorting link 4-pin sil header and shorting link 2-pin sil header and shorting link Test point Quad, 16-bit digital-to-analog converter 2.5 V voltage reference 3.3 V voltage regulator USB controller (Cypress CY7C68013A-56LFXC) EEPROM memory Quad, 12-bit analog-to-digital converter Quad, 2:1 multiplexer FEC 9509658 FEC 1318243 FEC 9786490 FEC 1111349 FEC 9632972 FEC 5217842 FEC 1357319 FEC 1022218 and FEC 150-411 (36-pin strip) FEC 1022244 and FEC 150-411 (36 + 36 pin strip) FEC 1022247 and FEC 150-411 FEC 8731128 Analog Devices, AD5754RBREZ Analog Devices, REF192GSZ Analog Devices, ADP3303ARZ-3.3 Digi-Key 428-1669-ND Rev. 0 | Page 10 of 12 Digi-Key 24LC64-I/SN-ND Analog Devices, AD7323BRUZ Analog Devices, ADG774BRQZ EVAL-AD5754R ORDERING GUIDE Model EVAL-AD5754REBZ1 1 ESD CAUTION Package Description AD5754R Evaluation Board Z = RoHS Compliant Part. Rev. 0 | Page 11 of 12 EVAL-AD5754R NOTES ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB06534-0-5/09(0) Rev. 0 | Page 12 of 12