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EVAL-AD5204SDZ User Guide

UG-345

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Te l: 781.329.4700 • Fax: 781.461.3113 • www.analog.com

Evaluation Board for the AD5204 Digital Potentiometer

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.

Rev. 0 | Page 1 of 16

FEATURES

Full featured evaluation board for the AD5204

Several test circuits

Various ac/dc input signals

PC control via a separately purchased system demonstration

platform (SDP-B)

PC control software

26 extra bytes in EEMEM for user-defined information

Resistor tolerance error stored in EEMEM

PACKAGE CONTENTS

EVAL-AD5204SDZ board

CD that includes

Self-installing software that allows users to control the

board and exercise all functions of the device

Electronic version of the AD5204 data sheet

Electronic version of the UG-345 user guide

GENERAL DESCRIPTION

This user guide describes the evaluation board for evaluating the

AD5204—a quad-channel, 256-position, digital potentiometer.

The AD5204 supports dual-supply ±2.3 V to ±2.7 V operation and

single-supply 2.7 V to 5.5 V operation, making the device suited

for battery-powered applications and many other applications.

The EVAL-AD5204SDZ can operate in single-supply and dual-

supply mode and incorporates an internal power supply from

the USB.

Complete specifications for the AD5204 part can be found in

the AD5204 data sheet, which is available from Analog Devices,

Inc., and should be consulted in conjunction with this user

guide when using the evaluation board.

DIGITAL PICTURE OF EVALUATION BOARD WITH SYSTEM DEMONSTRATION PLATFORM

EVAL-AD5204SDZ

SYSTEM DEMONSTRATION

PLATFORM

10363-001

Figure 1.

Summary of content (16 pages)

PAGE 1
EVAL-AD5204SDZ User Guide UG-345 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.
PAGE 2
UG-345 EVAL-AD5204SDZ User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Test Circuits ...................................................................................4 Package Contents .............................................................................. 1 Evaluation Board Software ...............................................................7 General Description .........................................
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EVAL-AD5204SDZ User Guide UG-345 EVALUATION BOARD HARDWARE POWER SUPPLIES LINK OPTIONS The EVAL-AD5204SDZ supports the use of single and dual power supplies. Several link and switch options are incorporated into the evaluation board and should be set up before using the board. Table 2 describes the positions of the links to control the evaluation board by a PC, via the SDP-B board, using the EVAL-AD5204SDZ in single-supply mode.
PAGE 4
UG-345 EVAL-AD5204SDZ User Guide TEST CIRCUITS 1µF The EVAL-AD5204SDZ incorporates several test circuits to evaluate the AD5204 performance. VDD – VSS 2 AC + DC AC AC_INPUT R34 A1 DAC RDAC1 RDAC1 can be operated as a digital-to-analog converter (DAC), as shown in Figure 2. W1 B1 AC + DC R36 B1 VDD R34 A1 RDAC1 VDD – VSS W1 A1 W1 2 VSS VSS VSS Table 4. DAC Voltage References BUF-W1 B1 A21 GND Table 5.
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EVAL-AD5204SDZ User Guide UG-345 In addition, R36 can be used to achieve a pseudologarithmic attenuation. To do so, adjust the R36 resistor until a desirable transfer function is found. R41 1.7kΩ VIN VOUT RDAC2 can be operated as an inverting or noninverting signal amplifier supporting linear or pseudologarithmic gains. Table 6 shows the available configurations.
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UG-345 EVAL-AD5204SDZ User Guide A4 Output Buffers RDAC4 RDAC3 and RDAC4 can be connected to an output buffer as shown in Figure 8 and Figure 9, respectively. W4 A4 W4 A3 VOUT4 BUF_4 B4 W3 A3 W3 VOUT3 B4 BUF_3 Figure 9. RDAC4 10363-008 B3 B3 10363-009 RDAC3 Figure 8. RDAC3 Rev.
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EVAL-AD5204SDZ User Guide UG-345 EVALUATION BOARD SOFTWARE INSTALLING THE SOFTWARE The EVAL-AD5204SDZ kit includes evaluation board software provided on a CD. The software is compatible with Windows® XP, Windows Vista, and Windows 7 (both 32-bit and 64-bit). 1. 2. 3. 4. 5. Start the Windows operating system and insert the CD. The installation software must open automatically. If it does not, run the setup.exe file from the CD.
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A1 A1 Rev. 0 | Page 8 of 16 Figure 12.
PAGE 9
EVAL-AD5204SDZ User Guide UG-345 VDD 8 U15-C V+ V4 VDD VSS R39 AC_INPUT A1 C3 A20 A U15-A 3 2 R40 + 1 B - C VDD AC + DC AC R34 A1 AD8652AR VSS DAC + FLOATING DAC + BW W1-1 W1-2 W1-3 W1-4 W1-5 W1-6 W1-7 W1-8 W1-9 W1-10 W1-11 W1-12 AD8403-1 W1_BUF BUF-W1 AD5204-1 3 + 1 U14-A 2 AD8618ARZ AD5233-1 W1 AD5162-1 AD5232-1 ADN2850-1 W1 AD5235-1 R36 AD5254-1 PSEUDOLOG ATTENUATOR AD5252-1 AD5172 AD5243-1 B1 AD5222-1 A21 A VDD B1 R35 B1 B R3 C VSS 6 5 AD8652AR - 7 + U15-B 1036
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Rev. 0 | Page 10 of 16 W3-8 W3-3 W3-2 W3-1 AD5254-4 AD5233-4 AD5204-4 AD8403-4 AD5254-3 AD5233-3 AD5204-3 AD8403-3 W4-8 W4-3 W4-2 W4-1 W3 W4 BUF-3 BUF-4 A3 B4 A4 B3 10 + 8 U14-C 9 AD8618ARZ 12 + 14 U14-D 13 AD8618ARZ CHANNELS 3 AND 4 B3 VOUT3 A3 B4 VOUT4 A4 O1 Figure 15. Schematic of AD5204 Power Supplies and Other Channels O2 O2 O1 DIGITAL PINS +3.3V +5V GND GND EXT VSS B A A24 + V1 V2 V2 V1 + 10uF C27 C24 10uF C26 0.1uF C25 0.
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+3.3V 24LC01 1 A0 2 A1 3 A2 4 VSS D6 LED U25 8 VCC 7 WP 6 SCL 5 SDA 1K R37 Rev. 0 | Page 11 of 16 RESET_BF SHDN_BF MUX-A0|CS MUX-A2|U/D SCL_BF SDA_BF DIN_BF SCLK_BF SYNC_BF +5V +3.3V J22 Figure 16.
PAGE 12
EVAL-AD5204SDZ User Guide 10363-014 UG-345 10363-012 Figure 17. Component Side View 10363-016 Figure 18. Component Placement Drawing Figure 19. Layer 2 Side PCB Drawing Rev.
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UG-345 10363-015 EVAL-AD5204SDZ User Guide 10363-013 Figure 20. Layer 3 Side PCB Drawing Figure 21. Solder Side PCB Drawing Rev.
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UG-345 EVAL-AD5204SDZ User Guide ORDERING INFORMATION BILL OF MATERIALS Table 7.
PAGE 15
EVAL-AD5204SDZ User Guide Qty 1 Reference Designator U13 1 U14 1 U15 1 1 U25 A22 1 UG-345 Description Supplier1/Part Number 2.5 V/3.
PAGE 16
UG-345 EVAL-AD5204SDZ User Guide NOTES I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD.