Evaluation Board for 8-/0-/-Bit, Parallel Input, Dual-Channel, Current Output DAC EVAL-AD58/AD50/AD5EB FEATURES Operates from dual ± V and 5 V supplies On-board reference and output amplifiers Direct hookup to printer port of PC PC software for control of DAC DESCRIPTION This data sheet describes the evaluation board hardware and software for the AD58/AD50/AD5 DACs briefly highlighted below. The AD58/AD50/AD5 devices are CMOS 8-, 0-, and -bit, current output, digital-to-analog converters (DACs). They operate from a.5 V to 5.5 V power supply, making them suited to battery-powered and other applications such as analog processing, waveform generators, and programmable attenuators. On power-up, the internal register and latches are filled with 0s and the DAC outputs are at zero scale. As a result of manufacture on a CMOS submicron process, the parts offer excellent -quadrant multiplication characteristics, with large-signal multiplying bandwidths of up to 0 MHz. The applied voltage reference determines the full-scale output current. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external I-to-V precision amplifier. Full data on the DACs is available in the AD58/AD50/AD5 data sheet, which should be consulted in conjunction with this data sheet when using the evaluation board. FUNCTIONAL BLOCK DIAGRAM V REF A V REF B ADR0 REFERENCE -WAY CENTRONICS CONNECTOR DATA BUFFER DAC A AD58/AD50/ AD5 8-/0-/-BIT DAC DAC B AD805 I TO V AD805 I TO V V OUT A V OUT B CS R/W VCC DGND VDD VDD AGND VSS 05-00 Figure. Rev. 0 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. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 90, Norwood, MA 00-90, U.S.A. Tel: 8.9.00 www.analog.com Fax: 8..80 005 Analog Devices, Inc. All rights reserved.
EVAL-AD58/AD50/AD5EB TABLE OF CONTENTS Hardware... Evaluation Board Power Supplies... Test Point Setup... Software... Setup... Running and Using the Software... Evaluation Board Schematic...5 Evaluation Board PCB Layers... Ordering Information... Bill of Materials... Ordering Guide...8 ESD Caution...8 REVISION HISTORY /05 Revision 0: Initial Version Rev. 0 Page of 8
EVAL-AD58/AD50/AD5EB HARDWARE The evaluation board consists of the AD58, AD50 or AD5 DAC, two AD805 op amps, and a 0 V reference, the ADR0. An external reference can also be applied via an SMB input connector. Digital buffering is supplied on board. Though excellent for dc performance, the bandwidth performance of the combined DAC and amplifier is limited to approximately 8 MHz. EVALUATION BOARD POWER SUPPLIES The evaluation board requires ± V and 5 V supplies. The V (VDD) and V (VSS) are used to power the output amplifier. The 5 V is used to power the DAC (VDD) and the transceivers (VCC). All supplies are decoupled to ground with 0 µf tantalum and 0. µf ceramic capacitors. TEST POINT SETUP The test point pins are connected on the evaluation board to the respective DAC, as shown in Table. For example, the least significant bit (LSB) of the AD50, DB0, is connected to the DB test point. Table. Test Point Setup Test Point DB DB0 DB9 DB8 DB DB DB5 DB DB DB DB DB0 AD5 DB DB0 DB9 DB8 DB DB DB5 DB DB DB DB DB0 AD50 DB9 DB8 DB DB DB5 DB DB DB DB DB0 NC NC AD58 DB DB DB5 DB NC NC NC NC DB DB DB DB0 Rev. 0 Page of 8
EVAL-AD58/AD50/AD5EB SOFTWARE The evaluation kit includes a CD-ROM with self-installing software to control the DAC. The software allows you to choose which device type you have and to load each DAC, in the dualchannel setup, with a digital word. SETUP The evaluation kit includes self-installing software on a CD-ROM. The software is compatible with Windows 95/9/000/NT/XP. If the setup file does not automatically run when you insert the CD, you can run the setup.exe file from the CD-ROM. INSTALLING AND USING THE SOFTWARE To operate the evaluation software:. Ensure that the centronics cable connects the PC to the evaluation board.. From the Analog Devices menu, click Start > All Programs > Analog Devices > AD58_0_ > AD58_0_ Evaluation Software. For older PCs, click Start > Programs > Analog Devices > AD58_0_->AD58_0_ Evaluation Software The AD58/0/ dialog box opens, as shown in Figure. Figure. Dialog Box. To select the resolution of the part on the evaluation board, click the appropriate button under Select Device.. Click either DAC A or DAC B. DAC A and DAC B are both configured to give an output voltage range of 0 V to 0 V. 5. In the Enter DAC Word [Hex] field, type a data-word to the DAC. You must enter the 8-/0-/-bit word in hexadecimal.. Press Enter on the keyboard to load the DAC and update the selected output. 05-00. From the drop-down Printer Port menu, select the printer port address from the list of available addresses. 8. Click File > Exit. Rev. 0 Page of 8
EVAL-AD58/AD50/AD5EB EVALUATION BOARD SCHEMATIC C DGND 05-00 U-A 8 C C C C5 C C9 C C C8 C0 C5 U AD5 AGND R FB B I OUT B R FB A I OUT A V REF A V REF B C TP TP J EXT REF A LK V IN V OUT C C 5 TRIM U GND A B C8 J5 EXT REF B C.8pF C.8pF V SS U V SS U V V V V C C C5 C C9 C0 C C TP TP J J O/P B O/P A DB0 8 DB DB DB 5 DB DB5 DB DB DB8 0 DB9 9 DB0 8 DB CS 9 RW 0 DB0 DB DB DB DB DB5 DB DB DB8 DB9 DB0 DB 5 DGND DGND DAC_A/B CS R/W J AGND V SS V CC J V CC LEBA OEBA A0 A A A A A5 A A CEAB GND VCC CEBA B B B5 B B B B B0 LEAB OEAB 5 U 9 0 ABT5 V CC LEBA OEBA A0 A A A A A5 A A CEAB GND VCC U5 CEBA B B B5 B B B B B0 LEAB OEAB 5 8 9 0 ABT5 P P P P P P 5 0 5 8 9 0 5 8 9 0 9 DGND 5 P P P 5 P P P A0 A Y0 Y Y E Y V CC 9 U-B Y0 A0 Y A Y 5 E Y P P P P 9 P 0 P P P P P 5 P P P 8 P 9 P 0 P 8 P 9 P Figure. Evaluation Board Schematic Rev. 0 Page 5 of 8
EVAL-AD58/AD50/AD5EB EVALUATION BOARD PCB LAYERS Figure. Component Placement Diagram 05-00 05-005 Figure 5. Component-Side PCB Layer 05-00 Figure. Solder-Side PCB Layer Rev. 0 Page of 8
ORDERING INFORMATION BILL OF MATERIALS Table. Name Part Description Value Tolerance (%) Stock Code EVAL-AD58/AD50/AD5EB C XR ceramic capacitor 0. µf 0 FEC 99-5 C XR ceramic capacitor 0. µf 0 FEC 99-5 C Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C XR ceramic capacitor 0. µf 0 FEC 99-5 C5 Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9-0 C XR ceramic capacitor 0. µf 0 FEC 99-5 C NPO ceramic capacitor.8 pf 0 FEC -8 C8 XR ceramic capacitor 0. µf 0 FEC 99-5 C9 Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C0 XR ceramic capacitor 0. µf 0 FEC 99-5 C Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C XR ceramic capacitor 0. µf 0 FEC 99-5 C XR ceramic capacitor 0. µf 0 FEC 99-5 C Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C5 XR ceramic capacitor 0. µf 0 FEC 99-5 C Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C XR ceramic capacitor 0. µf 0 FEC 99-5 C8 Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C9 XR Ceramic Capacitor 0. µf 0 FEC 99-5 C0 Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C XR ceramic capacitor 0. µf 0 FEC 99-5 C NPO ceramic capacitor.8 pf 0 FEC -8 C Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C XR ceramic capacitor 0. µf 0 FEC 99-5 C5 Tantalum capacitor Taj Series 0 µf, 0 V 0 FEC 9- C XR ceramic capacitor 0. µf 0 FEC 99-5 CS, DB0 to DB Red Test Point FEC 0-5 (pack) J to J SMB socket FEC 0-8 J SMB socket FEC 0-8 J SMB socket FEC 0-8 J SMB socket FEC 0-8 J5 SMB socket FEC 0-8 J SMB socket FEC 0-8 LK -pin header ( x ) FEC 5-9&58-5 P -pin centronics connector FEC -5 P -pin terminal block FEC 5-9 RW Red test point FEC 0-5 (pack) TP to TP Red test point FEC 0-5 (pack) U AD58/AD50/AD5 AD58YRU/AD50YRU/AD5YRU U ADR0 ADR0AR U AD805 AD805AR U, U5 ABT5 Fairchild ABT5CMTC U 9 CDHCT9M U AD805 AD805AR Each Corner Rubber stick-on feet FEC 8-9 Rev. 0 Page of 8
EVAL-AD58/AD50/AD5EB ORDERING GUIDE Model EVAL-AD58EB EVAL-AD50EB EVAL-AD5EB Description Evaluation Board Evaluation Board Evaluation Board ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. 005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB05 0 /05(0) Rev. 0 Page 8 of 8