Evaluation Board User Guide UG-471 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 Evaluating the AD5142 Digital Potentiometer FEATURES GENERAL DESCRIPTION Full featured evaluation board in conjunction with low This user guide describes the evaluation board for evaluating the voltage digiPOT motherboard (EVAL-MB-LV-SDZ) AD5142a quad-channel, 256-position, nonvolatile memory, Various test circuits digital potentiometer. With versatile programmability, the AD5142 Various ac/dc input signals allows multiple modes of operation, including read/write access PC control via a separately purchased system demonstration in the RDAC and EEMEM registers, increment/decrement of platform (SDP-B or SDP-S) resistance, resistance changes in 6 dB scales, wiper setting read- PC software for control back, and extra EEMEM for storing user-defined information, such as memory data for other components or a lookup table. PACKAGE CONTENTS The AD5142 supports a dual-supply 2.25 V to 2.75 V operation EVAL-AD5142DBZ board and a single-supply 2.3 V to 5.5 V operation, making the device EVAL-MB-LV-SDZ motherboard suitable for battery-powered applications and many other appli- CD that includes cations. In addition, the AD5142 uses a versatile SPI-compatible Self-installing software that allows users to control the serial interface, allowing speeds of up to 50 MHz. The EVAL- board and exercise all functions of the device AD5142DBZ can operate in single-supply or dual-supply mode Electronic version of the AD5142 data sheet and incorporates an internal power supply from the USB. Electronic version of the UG-471 user guide Complete specifications for the AD5142 part can be found in the AD5142 data sheet, which is available from Analog Devices, Inc., and should be consulted in conjunction with this user guide when using the evaluation board. EVAL-AD5142DBZ WITH MOTHERBOARD AND SDP-S Figure 1. Digital Picture of Evaluation Board with Low Voltage DigiPOT Motherboard and System Demonstration Platform PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 Page 1 of 20 11008-001UG-471 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Evaluation Board Software ...............................................................8 Package Contents .............................................................................. 1 Installing the Software ..................................................................8 General Description ......................................................................... 1 Software Operation .................................................................... 10 EVAL-AD5142DBZ with Motherboard and SDP-S ..................... 1 Evaluation Board Schematics and Artwork ................................ 11 Revision History ............................................................................... 2 Motherboard ............................................................................... 11 Evaluation Board Hardware ............................................................ 3 Daughter Board .......................................................................... 15 Power Supplies .............................................................................. 3 Ordering Information .................................................................... 18 Test Circuits ................................................................................... 4 Bill of Materials ........................................................................... 18 REVISION HISTORY 11/12Revision 0: Initial Version Rev. 0 Page 2 of 20