ANALOG DEVICES UG-296: Evaluating the AD5415 Serial Input Dual-Channel Current Output DAC Manual
Contents
1. AD5415 evaluation software window allows you to evaluate all the functions of the AD5415 09973 005 Example 1 Asynchronous Mode Complete the following steps in the CONTROL FUNCTIONS panel of the evaluation software window l Select LDAC High to tie the load DAC input high for the asynchronous loading mode specify quarter scale 0x400 1024 decimal in the Enter Data box and select DAC A under Load Input Register The value is kept in the register and the DAC does not update until you click Update DAC Outputs under Load and Update The expected output obtained is D 1024 x 10 x 4096 4096 2 Select Zero Scale under Clear DAC Output to clear the DAC outputs to 0 V 25V Vour Rev B Page 5 of 12 Synchronous Mode 2 Click Clear to MidScale under Hardware Clear and Disable under Daisy Chain Mode in the CONTROL REGISTER CONFIGURATION panel Next click the Load Control Word button The DAC B outputs change to midscale 0x800 and the signal in the SDO pin main tains a constant value until the daisy chain mode is enabled again 1 Change Loading Synchronism to Synchronous LDAC Control write 0xC00 3072 decimal in the Enter Data box and select DAC A under Load Input Register The output does not change until you select LDAC Low The expected output for this case is ET D 10x 3072 _ 75V 3 Click EXIT when you complete your evaluation 8 1029 Table 1 and Table 2 describe the contr2. Page 11 of 12 NOTES ESD Caution ESD electrostatic discharge sensitive device Charged devices and circuit boards can discharge without detection Although this product features patented 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 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 excl
3. 3 EVAL AD5415 AD5449SDZ to SPORT Interface 3 Operating the Evaluation Board sss 3 Serial Interface oett a E E ENE 3 Microprocessor Interfacing eene 3 REVISION HISTORY 3 12 Rev A to Rev B Changed EVAL AD5415 AD5449SDZ to EVAL AD5415SDZ Throughout kisaan D I NIHU AN 1 Change to Piguies use cede RET a 1 Changed ADSP BF5xx to ADSP BF527 Throughout 3 GENTE ORSIuL Cp 3 Changes to Figure 3 and Installing the Software Section 4 Changes to Using the Evaluation Board Software Section 5 Changes to Evaluation Board Schematics and Artwork Section M 8 Evaluation Board Software sse 4 Installingthe Software eite tete edite 4 Running the Software eedem 4 Using the Evaluation Board Software sss 5 Evaluation Board Functions and Registers 5 Evaluation Board Schematics and Artwork 8 Schem tics eet ote ten ee edet 8 Evaluation Board Layout 10 Related Links pereee 11 6 11 Rev 0 to Rev A Document Title Format and Content Changed from EVAL AD5415E Revision 0 to UG 296 Rev A Universal 3 10 Revision 0 Initial Version Rev B Page 2 of 12 EVALUATION BOARD The EVAL AD5415SDZ board consists of an AD5449 DAC an AD5415 DAC and AD8065 current to voltage amplifiers Inclu
4. ANALOG DEVICES Evaluation Board User Guide UG 296 One Technology Way Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 Fax 781 461 3113 www analog com Evaluating the AD5415 Serial Input Dual Channel Current Output DAC FEATURES Full featured evaluation board for the AD5415 Graphic user interface software for board control and data analysis Connector to EVAL SDP CB1Z system demonstration platform board Various power supply options APPLICATIONS Portable battery powered applications Waveform generators Analog processing Instrumentation applications Programmable amplifiers and attenuators Digitally controlled calibration Programmable filters and oscillators Composite video Ultrasound Gain offset and voltage trimming GENERAL DESCRIPTION The AD5415 is a CMOS 12 bit dual channel current output digital to analog converter This device operates from a 2 5 V to 5 5 V power supply making it suited to battery powered and other applications As a result of being manufactured on a CMOS submicron process this part offers excellent four quadrant multiplication character istics with large signal multiplying bandwidths of 10 MHz The applied external reference input voltage Vrerx determines the full scale output current An integrated feedback resistor provides temperature tracking and full scale voltage output when combined with an external current to voltage precisi
5. C is low Loads the DAC B register with the entered data word and updates the DAC B output irrespective of the state of LDAC Reads the contents of the DAC B register and displays the value on screen Loads the DAC B input register with the entered data word The DAC B output is updated only if LDAC is low Updates both DAC outputs with the entered data word irrespective of the state of LDAC Loads the input registers of both DACs with the entered data word Both outputs are updated only if LDAC is low Loads both DACs and updates their outputs with zero scale code irrespective of the state of LDAC Loads both DACs and updates their outputs with midscale code irrespective of the state of LDAC Both Outputs Table 2 Control Register Description SDO Configuration The SDO bits enable you to control the SDO output driver strength disable the SDO output or configure Daisy Chain Mode Hardware Clear Active SCLK Edge Load Control Word the SDO as an open drain driver The strength of the SDO driver affects timing A stronger SDO output driver allows a faster clock cycle to be used Enables or disables daisy chain functionality Sets the value to which the outputs are cleared on the falling edge of the CLR signal The value can be either zero scale or midscale Selects the edge of SCLK on which data is clocked into the input register Data is clocked out from SDO on the opposite edge Loads control regis
6. P requires 5V 200mA 09973 008 Figure 8 Evaluation Board Schematic Part C SDP Board Rev B Page 9 of 12 EVALUATION BOARD LAYOUT Figure 9 Component Side Artwork VOUT PA LI seek c6 je p cu mye 02 v 2 spol c2 8 ow La VDD Jio amp RE Bi VOUT B 8 LpACi C23 9 05 gt a USB_VBUS sca 25 a w O 3 soni Sk g AGND 5 v 3 42 Ju s 010 gsr bur e TP SE 5 enc ege E 8 xg 9 Rev m BEES OO Figure 10 Silkscreen Component Side View Top Rev B Page 10 of 12 09973 009 09973 010 91944141912 000000 09973 011 Figure 11 Solder Side Artwork RELATED LINKS Resource Description AD5415 Product Page AD5415 Dual 12 Bit High Bandwidth Multiplying DAC with Four Quadrant Resistors and Serial Interface AD5449 Product Page AD5449 Dual 12 Bit High Bandwidth Multiplying DAC with Serial Interface ADRO1 Product Page ADRO1 Ultracompact Precision 10 0 V Voltage Reference AD8065 Product Page AD8065 High Performance 145 MHz FastFET Op Amp Rev B
7. adios 88 Computer ControlVault Device cs Disk drives amp Display adapters cS DVD CD ROM drives 95 Human Interface Devices ca IDE ATA ATAPI controllers IEEE 1394 Bus host controllers A Imaging devices amp Keyboards 09973 003 Figure 3 Device Manager Showing the SDP Board Connected INSTALLING THE SOFTWARE The EVAL AD5415SDZ kit includes the software and drivers a CD To install the software follow these steps 1 Install the software before connecting the SDP board to the USB port of the PC Start the Windows operating system and insert the EVAL AD5415SDZ kit CD Download the EVAL AD5415SDZ LabVIEW software The correct driver for the SDP board SDPDriversNET should download automatically after LabVIEW is down loaded supporting both 32 bit and 64 bit systems However if the drivers do not download automatically the driver executable file can also be found in the All Programs Analog Devices folder from the Start menu Follow the on screen prompts to install it After installation of the software and drivers is complete plug the EVAL AD5415SDZ into the SDP board and the SDP board into the PC using the USB cable included in the kit Confirm that the SDP board has been recognized and is displayed in the Device Manager dialog box by clicking Start Control Panel System Hardware Device Manager see Figure 3 When the software detects the evaluation board proceed through any dialog bo
8. cluding 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 5100 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 t
9. ded on the evaluation board is a 10 V reference the ADROI An external reference can also be applied via an SMB input The evaluation kit consists of a CD ROM with self installing PC software to control the DAC The software allows the user to write a code to the device The EVAL AD5415SDZ board is used in conjunction with the EVAL SDP CB1Z system demonstration platform SDP board available from Analog Devices Inc which is purchased separately from the evaluation board The USB to SPI communication to the AD5415 is completed using this Blackfin based demonstration board The software offers waveform generator SYSTEM DEMONSTRATION PLATFORM The SDP is a hardware and software evaluation tool for use in conjunction with product evaluation boards The SDP board is based on the Blackfin ADSP BF527 processor with USB connectivity to the PC through a USB 2 0 high speed port For more information about this device see the system demonstration platform web page at www analog com EVAL SDP CB1Z EVAL AD5415SDZ TO SPORT INTERFACE The Analog Devices SDP has one SPORT serial port The SPORT interface is used to control the AD5415 allowing clock frequencies of up to 30 MHz OPERATING THE EVALUATION BOARD The board requires 12 V and 5 V supplies The 12 V Vpp and 12 V Vss are used to power the output amplifier the 5 V supply is used to power the DAC V and transceivers Vcc Both supplies are decoupled to their respective gr
10. his 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 2010 2012 Analog Devices Inc All rights reserved Trademarks and AN ALOG registered trademarks are the property of their respective owners UG09973 0 3 12 B DEVICES www analo g com Rev B Page 12 of 12
11. ol functions and control 2 Click DAC A under Initiate Readback to confirm that registers respectively The disable daisy chain and clock data to the last value loaded in the DAC A register is the same as shift register on rising edge mode functions are loaded with the the one read and shown in the DAC A numeric indicator control register Although they can also be implemented text box loading the specified control bits for these functions they are Example 2 only available within the control word for the software provided Control Register Configuration 1 Working in asynchronous mode load and update DAC B with full scale OxFFF The expected output is D 4095 Vour Veer X 10 x 10 10 OUT REF REF xu n l Rev B Page6 of 12 Table 1 Control Functions Control Function Description Load and Update DAC A Initiate Readback DAC A Load Input Register DAC A Load and Update DAC B Initiate Readback DAC B Load Input Register DAC B Load and Update Update DAC Outputs Both DACs Load Input Register DAC A and DAC B Clear DAC Output Zero Scale Both Outputs Clear DAC Output Midscale Loads the DAC A register with the entered data word and updates the DAC A output irrespective of the state of LDAC Reads the contents of the DAC A register and displays the value on screen Loads the DAC A input register with the entered data word The DAC A output is updated only if LDA
12. on amplifier In addition this device contains the four quadrant resistors necessary for bipolar operation and other configuration modes This DAC uses a double buffered 3 wire serial interface that is compatible with SPI QSPI MICROWIRE and most DSP interface standards In addition a serial data out pin SDO allows daisy chaining when multiple packages are used Data readback allows the user to read the contents of the DAC register via the SDO pin On power up the internal shift register and latches are filled with 0s and the DAC outputs are at zero scale The AD5415 DAC is available in a 24 lead TSSOP package The evaluation board EVAL AD5415SDZ is available for evaluating the performance of the AD5415 DAC EVALUATION BOARD FUNCTIONAL BLOCK DIAGRAM VnErA VrerB LR CONNECTOR TO SDP 1Z SDO LDAC SYNC SDIN SCLK VDD1 VDD AGND VSS PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS AD5449 12 BIT DAC AD5415 12 BIT DAC Figure 1 ADRO1 REFERENCE EVAL AD5415SDZ 09973 001 Rev B Page 1 of 12 TABLE OF CONTENTS Features icr 1 Applications tee de ide Re eR 1 General Description i irte ite 1 Evaluation Board Functional Block Diagram 1 Revision 2 Evaluation iterat e ta 3 System Demonstration Platform sees
13. ound plane with 10 tantalum and 0 1 uF ceramic capacitors SERIAL INTERFACE The AD5415 has an interface that is compatible with SPI QSPI MICROWIRE and most DSP interface standards Data is written to the device in 16 bit words Each 16 bit word consists of four control bits and 12 data bits for the AD5415 Control bits allow control of various functions on the DAC MICROPROCESSOR INTERFACING Microprocessor interfacing to the AD5415 DAC is through a serial bus that uses a standard protocol compatible with micro controllers and DSP processors The SDP is a hardware and software platform that provides a means to communicate from the PC to Analog Devices products and systems that require digital control and or readback The SDP has a Blackfin processor ADSP BF527 at its core The ADSP BF527 processor incorporates channel synchronous serial ports SPORT and general purpose input output GPIO pins A serial interface between the Blackfin processor and the AD5415 DAC is shown in Figure 2 For more details about the system demonstration platform see the EVAL SDP CB1Z at www analog com EVAL SDP CB1Z ADSP BF527 AD5415 SPORT TFS SYNC SPORT RFS SPORT TSCLK SCLK SPORT RSCLK SPORT DTO SDIN SPORT DRO SDO GPIO1 LDAC GPIO2 CLR Figure 2 ADSP BF527 to AD5415 Interface 09973 002 Rev B Page 3 of 12 EVALUATION BOARD SOFTWARE 3 Device Manager File Action View gl B sz E 1 Bluetooth R
14. ter mode Rev B Page 7 of 12 EVALUATION BOARD SCHEMATICS AND ARTWORK SCHEMATICS 900 2660 Snot 142 Idi 21 ZSXaLouqv Anio 3 01 Anio 02 t 9080 8 t SSA 3nrol 522 2221 ano s 8334A gt Ed 9 0 8 gn LN 1 v 38A 833A EH 3 VA3UA ZN Sivsav in VAJ38A veu ve eu veu vc1fOI x 55 C 189 lt Joas 19 5 C Nas Cons Figure 6 Evaluation Board Schematic Part A AD5415 Rev B Page 8 of 12 C27 10uF C28 O tuF SCLK1 SDIN1 SYNC1 U7 08065 us C45 10uF VDD V C46 0 1uF e g z VREFA lt vrere o 05429 39 49 5 8065 Km us V B 10uF V VDD C35 0 tuF Figure 7 Evaluation Board Schematic Part B AD5449 09973 007 BMODE1 Pull up with a 10K resistor to set SDP to boot from SPI FLASH on the daughter board J3A 60 Here 98 SDP STANDARD CONNECTOR TIMERS GENERAL INPUT OUTPUT Main I2C bus Connected to blackfin TWI Pull up resistors not required I2C bus 1 is common across both connectors on SDP Pull up resistors required connected to blackfin GPIO use 12 0 first PARALLEL PORT USB VBUS VIO USE to set IO voltage mox draw 20mA VIN Use this pin to power the SD
15. usive 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 in
16. xes that appear to finalize the Rev B Page 4 of 12 installation Found New Hardware Wizard Install the Software Automatically and so on RUNNING THE SOFTWARE To run the evaluation board program do the following 1 Click Start All Programs Analog Devices EVAL AD5415 49SDZ If the SDP board is not connected to the USB port when the software is launched a connectivity error displays see Figure 4 Simply connect the evaluation board to the USB port of the PC wait a few seconds click Rescan and follow the instructions No matching system found Press Rescan to retry or Cancel to abort Previous Cancel Figure 4 Connectivity Error 09973 004 Evaluation Board User Guide UG 296 USING THE EVALUATION BOARD SOFTWARE Load Control Word 4 EVAL AD5415 AD5449SDZ Figure 5 Evaluation Software Window To operate the evaluation software 1 Ensure that the PC is connected to the system demonstra tion platform EVAL SDP CB1Z and the EVAL SDP CB1Z to the evaluation board via the USB cable provided in the kit 2 Run the program file from Start All Programs Analog Devices The EVAL AD5449_AD5415SDZ window opens as shown in Figure 5 EVALUATION BOARD FUNCTIONS AND REGISTERS From the AD5415 evaluation software window you can write a data word to either DAC A or DAC B or both DACs Type the 12 bit data word in hexadecimal format in the Enter Data box of the CONTROL FUNCTIONS panel The
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ANALOG DEVICES UG 296: Evaluating the AD5415 Serial Input Dual Channel Current Output DAC Manual