V OUT Evaluation Board for 12-/14-Bit, Serial Input, Dual Channel, Current Output DACs EVAL-AD5444/AD5446 The applied external reference input voltage (VREF) determines FEATURES the full-scale output current. An integrated feedback resistor Operates from dual 12 V and +5 V supplies (RFB) provides temperature tracking and full-scale voltage On-board reference and output amplifiers output when combined with an external I-to-V precision amplifier. Direct hookup to the printer port of a PC PC software for control of the DAC Complete information about the DAC can be found in the AD5444/AD5446 data sheet that is available from Analog GENERAL DESCRIPTION Devices, Inc. it should be consulted in conjunction with this data This data sheet describes the evaluation board for the sheet when using the evaluation board. AD5444/AD5446 DACs. The AD5444/AD5446 are, respect- PACKAGE CONTENTS ively, CMOS 12-/14-bit current output, digital-to-analog The board consists of the AD5444/AD5446 and a current-to- converters (DACs). They operate from a +2.5 V to +5.5 V power supply, making them suited to battery-powered and voltage amplifier (AD8065). Included on the evaluation board is a 10 V reference (ADR01). Also, an external reference can be other applications. applied via an SMB input connector, and the SDO readback These DACs use data readback, allowing the user to read the function can be enabled. The LDAC function is not available contents of the DAC register via the DB pins. On power-up, the with the AD5444/AD5446. internal register and latches are filled with zeros and the DAC Included in the evaluation kit is a CD ROM with self-installing output is at zero scale. software to control the DAC. The software allows the user to Because the DACs are manufactured on a CMOS submicron exercise all functions of the AD5444/AD5446. process, they offer excellent four-quadrant multiplication characteristics. FUNCTIONAL BLOCK DIAGRAM V REF ADR01 REFERENCE AD8065 AD5444/AD5446 I-TO-V 12-/14-BIT DAC VDDA VDD VSS AGND SYNC SDIN SCLK 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. from its use. Analog Devices reserves the right to change devices or specifications at any time Tel: 781.329.4700 www.analog.com 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. Fax: 781.461.3113 2008 Analog Devices, Inc. All rights reserved. 36-WAY CENTRONICS CONNECTOR 05519-001EVAL-AD5444/AD5446 TABLE OF CONTENTS Features .............................................................................................. 1 Evaluation Board Software...........................................................3 General Description ......................................................................... 1 Evaluation Board Schematics and Artwork...................................4 Package Contents.............................................................................. 1 Ordering Information.......................................................................7 Functional Block Diagram .............................................................. 1 Bill of Materials..............................................................................7 Revision History ............................................................................... 2 Ordering Guide .............................................................................7 Evaluation Board Hardware and Software .................................... 3 ESD Caution...................................................................................7 Evaluation Board Hardware........................................................ 3 REVISION HISTORY 2/08Revision 0: Initial Version Rev. 0 Page 2 of 8