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EVAL-AD5755-1SDZ

Evaluation Board User Guide

Analog Devices 

Evaluation Board User Guide

UG-244

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

Evaluation Board for a Quad-Channel, 16-Bit, Serial Input, 4 mA to 20 mA,

Voltage Output DAC with Dynamic Power Control and HART Connectivity

FEATURES

Full-featured evaluation board for the AD5755, AD5755-1,

AD5757, and

Link options

PC control in conjunction with Analog Devices, Inc., system

demonstration platform (SDP)

PC software for control

GENERAL DESCRIPTION

The EVAL-AD575xSDZ is a full-featured evaluation board that

is designed to allow the user to easily evaluate all features of the

AD5755, AD5755-1, or AD5757, quad channel, 16-bit current

source and voltage output DAC with dynamic power control

and HART connectivity. The board can be controlled by two

means: via the on-board connector (J11) or via the SDP

connector (J9). The SDP board allows the evaluation board to

be controlled through the USB port of a Windows® XP® (SP2 or

later) or Windows Vista® (32-bit or 64-bit) or Windows 7 (32-bt

or 64-bit) based PC using the EVAL-AD575xSDZ evaluation

software.

DEVICE DESCRIPTION

The AD5755 is a quad, voltage and current output DAC that

operates with a power supply range from −26.4 V to +33 V.

On-chip dynamic power control minimizes package power

dissipation in current mode. This is achieved by regulating

the voltage on the output driver from 7.4 V to 29.5 V.

The part uses a versatile 3-wire serial interface that operates at

clock rates up to 30 MHz and is compatible with standard SPI,

QSPI™, MICROWIRE™, DSP, and microcontroller interface

standards. The interface also features optional CRC-8 packet

error checking, as well as a watchdog timer that monitors

activity on the interface.

The AD5757 is a current output-only version of the AD5755

and is HART compatible. The AD5755-1 is identical to the

AD5755 except the –VSENSE_x functionality has been removed

and, instead, the device is HART compatible. For both the

AD5757 and AD5755-1, each channel has a corresponding

CHART pin so that HART signals can be coupled onto the

current output.

EVALUATION BOARD CONNECTION DIAGRAM

PC

USB

PORT

POWER SUPPLY INPUTS

SYSTEM DEMONSTRATION

PLATFORM

BOARD

AD5755

AGND

IOUT_C

–VSENSE_C

VOUT_C

+VSENSE_C

CHANNEL C

PIN HEADER (J11)

AGND

IOUT_D

–VSENSE_D

VOUT_D

+VSENSE_D

CHANNEL D

PER-CHANNEL

DC-DC

CIRCUITRY

5V

VOLTAGE

REFERENCE

EXT REF

REFOUT

REFIN

AGND

IOUT_A

–VSENSE_A

VOUT_A

+VSENSE_A

CHANNEL A

AGND

IOUT_B

–VSENSE_B

VOUT_B

+VSENSE_B

CHANNEL B

Figure 1.

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.

Rev. B | Page 1 of 16

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