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Evaluation Board User Guide

UG-309

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 AD5546 Current Output/Serial Input DACs

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.

Rev. A | Page 1 of 12

FEATURES

Full-featured evaluation board for the AD5546

Graphic user interface software for board control and data

analysis

Connector to EVAL-SDP-CB1Z system demonstration

platform board

Various power supply options

APPLICATIONS

Automatic test equipment

Instrumentation

Digitally controlled calibration

Digital waveform generation

GENERAL DESCRIPTION

The AD5546 is a precision 16-bit, multiplying, low power,

current output, parallel input digital-to-analog converter (DAC).

It operates from a single 2.7 V to 5.5 V supply with ±10 V

multiplying references for four-quadrant outputs. Built-in

four-quadrant resistors facilitate the resistance matching and

temperature tracking that minimize the number of components

needed for multiquadrant applications.

The applied external reference input voltage (V

REF

) determines

the full-scale output current. The feedback resistor (R

) simpli-

fies the I-to-V conversion with an external buffer.

The AD5546 is packaged in compact 28-lead TSSOP packages

with operating temperatures from –40°C to +125°C.

The E VA L -AD5546SDZ is used in conjunction with the E VA L -

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 DAC

is completed using this Blackfin®-based demonstration board.

FUNCTIONAL BLOCK DIAGRAM

AD5546 AD8065

LDAC

REF

MSB

OUT

I-TO-V

10112-001

D0... D15

GPIO

PARALLEL

PORT

USB

EVAL-SDP-CB1Z

ADR01

REFERENCE

Figure 1.

Summary of content (12 pages)

PAGE 1
Evaluation Board User Guide UG-309 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 AD5546 Current Output/Serial Input DACs FEATURES It operates from a single 2.7 V to 5.5 V supply with ±10 V multiplying references for four-quadrant outputs. Built-in four-quadrant resistors facilitate the resistance matching and temperature tracking that minimize the number of components needed for multiquadrant applications.
PAGE 2
UG-309 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Applications Provided .......................................................................4 Applications ....................................................................................... 1 Using the Evaluation Board Software .............................................5 General Description ..............................................
PAGE 3
Evaluation Board User Guide UG-309 10112-002 EVALUATION BOARD SOFTWARE Figure 2. Device Manager Showing the SDP Board Connected INSTALLING THE SOFTWARE RUNNING THE SOFTWARE The EVAL-AD5546SDZ kit includes the software and drivers on a CD. To install the software, follow these steps: To run the evaluation board program, do the following: 2. 3. 4. 5. Install the software before connecting the SDP board to the USB port of the PC. Start the Windows® operating system and insert the EVALAD5546SDZ CD.
PAGE 4
UG-309 Evaluation Board User Guide APPLICATIONS PROVIDED The EVAL-AD5546SDZ board provides the possibility of configuring the DAC in two different unipolar two-quadrant multiplying modes. Table 1 show how to select the desired voltage reference. Table 2 shows the connections needed to obtain these unipolar modes. Table 1. Voltage Reference Selection Link Connections Link No. Position LK1 IN OUT Function Internal voltage reference ADR01 connected.
PAGE 5
Evaluation Board User Guide UG-309 USING THE EVALUATION BOARD SOFTWARE When the software is launched, the main window appears (see Figure 4). EXAMPLE Using the internal voltage reference in the unipolar twoquadrant multiplying mode (VOUT = 0 V to −VREF), with LDAC, MSB, and RS tied high, specify quarter scale (0x4000 or 16,384 decimal) in the Input Data box and click Write DAC. The expected output obtained is VOUT = −VREF × D 16,384 = −10 × = −2.
PAGE 6
UG-309 Evaluation Board User Guide EVALUATION BOARD SCHEMATICS AND ARTWORK SCHEMATICS 10112-005 Figure 5. EVAL-AD5546SDZ Schematic, SDP Connector Rev.
PAGE 7
Evaluation Board User Guide UG-309 10112-006 Figure 6. EVAL-AD5546SDZ Schematic, DAC Rev.
PAGE 8
UG-309 Evaluation Board User Guide 10112-007 EVALUATION BOARD LAYOUT 10112-008 Figure 7. Silkscreen Figure 8. Component Side Rev.
PAGE 9
UG-309 10112-009 Evaluation Board User Guide Figure 9. Solder Side RELATED LINKS Resource AD5546 ADR01 AD8065 EVAL-SDP-CB1Z Description Product Page, AD5546 Current-Output Parallel-Input, 16-Bit Digital-toAnalog-Converter Product Page, ADR01 Ultracompact, Precision 10.0 V Voltage Reference Product Page, AD8065: High Performance, 145 MHz FastFET™ Op Amp Product Page, SDP-B: System Demonstration Platform—Blackfin Rev.
PAGE 10
UG-309 Evaluation Board User Guide NOTES Rev.
PAGE 11
Evaluation Board User Guide UG-309 NOTES Rev.
PAGE 12
UG-309 Evaluation Board User Guide NOTES 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. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.