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Evaluation Board for 8-/10-/12-Bit, Parallel

Input, Dual-Channel, Current Output DAC

EVAL-AD5428/AD5440/AD5447EB

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 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

FEATURES

Operates from dual ±12 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 AD5428/AD5440/AD5447 DACs briefly

highlighted below.

The AD5428/AD5440/AD5447 devices are CMOS 8-, 10-, and

12-bit, current output, digital-to-analog converters (DACs).

They operate from a 2.5 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 4-quadrant multiplication characteristics,

with large-signal multiplying bandwidths of up to 10 MHz.

The applied voltage reference determines the full-scale output

current. An integrated feedback resistor (R

) 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 AD5428/AD5440/AD5447

data sheet, which should be consulted in conjunction with this

data sheet when using the evaluation board.

FUNCTIONAL BLOCK DIAGRAM

VDD1VCC DGND VSSVDD AGND

36-WAY CENTRONICS

CONNECTOR

AD5428/AD5440/

AD5447

8-/10-/12-BIT DAC

ADR01

REFERENCE

DATA

BUFFER

REF

OUT

DAC A

DAC B

AD8065

I TO V

OUT

AD8065

I TO V

REF

R/W

05274-001

Figure 1.

Summary of content (8 pages)

PAGE 1
Evaluation Board for 8-/10-/12-Bit, Parallel Input, Dual-Channel, Current Output DAC EVAL-AD5428/AD5440/AD5447EB On power-up, the internal register and latches are filled with 0s and the DAC outputs are at zero scale.
PAGE 2
EVAL-AD5428/AD5440/AD5447EB TABLE OF CONTENTS Hardware ........................................................................................... 3 Evaluation Board Schematic ............................................................5 Evaluation Board Power Supplies............................................... 3 Evaluation Board PCB Layers......................................................6 Test Point Setup ............................................................................
PAGE 3
EVAL-AD5428/AD5440/AD5447EB HARDWARE EVALUATION BOARD POWER SUPPLIES The evaluation board consists of the AD5428, AD5440 or AD5447 DAC, two AD8065 op amps, and a 10 V reference, the ADR01. 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. The evaluation board requires ±12 V and +5 V supplies.
PAGE 4
EVAL-AD5428/AD5440/AD5447EB 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. The AD5428/40/47 dialog box opens, as shown in Figure 2. SETUP 05274-002 The evaluation kit includes self-installing software on a CD-ROM. The software is compatible with Windows® 95/97/2000/NT/XP.
PAGE 5
C21 0.1µF Figure 3. Evaluation Board Schematic Rev.
PAGE 6
EVAL-AD5428/AD5440/AD5447EB 05274-004 EVALUATION BOARD PCB LAYERS 05274-005 Figure 4. Component Placement Diagram 05274-006 Figure 5. Component-Side PCB Layer Figure 6. Solder-Side PCB Layer Rev.
PAGE 7
EVAL-AD5428/AD5440/AD5447EB ORDERING INFORMATION BILL OF MATERIALS Table 2.
PAGE 8
EVAL-AD5428/AD5440/AD5447EB ORDERING GUIDE Model EVAL-AD5428EB EVAL-AD5440EB EVAL-AD5447EB Description Evaluation Board Evaluation Board Evaluation Board ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 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.