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EVAL-AD7944FMCZ/EVAL-AD7985FMCZ/
EVAL-AD7986FMCZ User Guide
UG-727
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
Evaluating the AD7944/AD7985/AD7986 14-/16-/18-Bit, PulSAR ADCs
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 31
FEATURES
Full featured evaluation board for the
AD7944/AD7985/AD7986
Versatile analog signal conditioning circuitry
On-board reference, reference buffers, and ADC drivers
System demonstration board compatible (EVAL-SDP-CH1Z)
PC software for control and data analysis of time and
frequency domain
EVALUATION KIT CONTENTS
EVAL-AD7944FMCZ/EVAL-AD7985FMCZ/EVAL-AD7986FMCZ
evaluation board
ADDITIONAL EQUIPMENT AND SOFTWARE
System demonstration platform (EVAL-SDP-CH1Z)
Precision source
World-compatible, 12 V dc supply adapter
(included with EVAL-SDP-CH1Z)
Power supply, +7.5 V/−3.0 V (optional)
USB cable
SMA cable
ONLINE RESOURCES
Documents Needed
AD7944, AD7985, and AD7986 data sheet
EVAL-AD7944FMCZ/EVAL-AD7985FMCZ/
EVAL-AD7986FMCZ user guide
Required Software
AD7944/AD7985/AD7986 evaluation software
Design and Integration Files
Schematics, layout files, bill of materials
GENERAL DESCRIPTION
The EVAL-AD7944FMCZ/EVAL-AD7985FMCZ/
EVAL-AD7986FMCZ are evaluation boards designed to
demonstrate the low power performance of the AD7944/
AD7985/AD7986 14-/16-/18-bit, PulSAR® analog-to-digital
converters (ADCs) and to provide an easy to understand
interface for a variety of system applications. Full descriptions
of the AD7944, AD7985, and AD7986 are available in the
respective product data sheets, which should be consulted in
conjunction with this user guide when using these evaluation
boards.
The user PC software controls the evaluation board over the USB
cable through the Analog Devices, Inc., system demonstration
platform (SDP) board, the EVAL-SDP-CH1Z.
On-board components include the following:
The ADR3412/ADR4525/ADR4550 high precision,
buffered band gap, 1.2 V/2.048 V/5.0 V reference options
The AD8031 reference buffer
The ADA4899-1/ADA4897-1/AD8021 signal conditioning
circuit with three op amps and an option to use a
differential amplifier (AD8139)
The ADP7118, ADM7160, ADP2370, and ADP7182
regulators to derive necessary voltage levels on board
The EVAL-AD7944FMCZ/EVAL-AD7985FMCZ/
EVAL-AD7986FMCZ evaluation boards interface to the
EVAL-SDP-CH1Z SDP board via a 160-pin FMC connector.
SMA connectors, JP1/JP4 and JP2/JP5, are provided for the
low noise analog signal source.
TYPICAL EVALUATION SETUP
TO 12V WALL WART
PC
SIGNAL SOURCE
SMA
CONNECTOR
USB
12476-001
Figure 1.
