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Evaluation Board User Guide
UG-224
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 AD7194, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta (Σ-Δ) ADC
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 20
FEATURES
Full-featured evaluation board for the AD7194
PC software for the control of the AD7194 using a
USB interface
Various linking options
INTRODUCTION
This user guide describes the EVAL-AD7194EBZ evaluation
board. The AD7194 is a 4.8 kHz, ultralow noise, 24-bit Σ-Δ ADC.
The AD7194 is a complete analog front end for low frequency
measurement applications. It contains eight differential inputs/
16 pseudo differential inputs and includes a low noise
instrumentation amplifier and reference detect.
Full data on the AD7194 is available in the AD7194 data sheet
available from Analog Devices, Inc., and should be consulted in
conjunction with this user guide when using the evaluation board.
GENERAL DESCRIPTION
The AD7194 evaluation kit is a powerful tool for exploring and
evaluating the AD7194 features.
When the board is connected to (and possibly powered from) a
PC via a standard USB interface, the PC software allows for
• The graphical display of real-time data and logs this data
into a text file.
• The modification of the internal settings of the AD7194.
This software also helps in understanding the part features and
performance.
Finally, the flexible interface structure of the board allows it to
be connected in a number of useful configurations. For example,
the digital section of the evaluation board can be used
independently as a convenient digital interface for a user’s
own sensor design printed circuit board (PCB) or module
containing the AD7194. Alternatively, an external micro-
controller can be interfaced to the AD7194, and the evaluation
board can act as a complete analog front end for creating and
debugging software on the digital platform of the user.
AD7194 EVALUATION BOARD
VOLTAGE
REFERENCE
ANALOG
INPUTS
SPI/USB
INTERFACE
REFIN
VOLTAGE
REGULATOR
EXT
AD7194
NOISE TEST
CIRCUITRY
PC
AND
LabVIEW™
BASED
SOFTWARE
09553-001
Figure 1.
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