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AD7191 用户编程技术手册 - ADI（亚德诺）
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ADI（亚德诺）
描述:
引脚可编程，超低噪声， 24位Σ-Δ型ADC，用于桥式传感器 Pin-Programmable, Ultralow Noise, 24-Bit, Sigma-Delta ADC for Bridge Sensors
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AD7191数据手册
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若手册格式错乱，请下载阅览PDF原文件
Evaluation Board User Guide
UG-280
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 AD7191 Pin-Programmable, 24-Bit 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 AD7191
Standalone interface using microcontroller and LCD display
PC software for control of AD7191 using USB interface
Various linking options
INTRODUCTION
This user guide describes the evaluation board for the AD7191,
which is a pin-programmable, ultralow noise, 24-bit sigma-
delta (Σ-Δ) ADC. The AD7191 is a complete analog front end
for low frequency measurement applications. It contains two
differential inputs and includes a low noise PGA and a low-side
power switch.
Full data on the AD7191 is available in the AD7191 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 AD7191 evaluation kit is a powerful tool for exploring and
evaluating the AD7191 features.
The evaluation board can be operated in complete standalone,
battery powered mode. The LCD display is used to display the
conversion data.
When the board is connected to (and possibly powered from) a
PC via a standard USB interface, the PC software allows the
graphical display of real-time data, logs them into a text file,
allows the user to modify the settings of the AD7191, and
generally helps in understanding the part features and
performance.
Finally, the board’s flexible interface structure allows it to be
connected in a number of useful configurations. For example,
the digital section of the evaluation board can be used inde-
pendently as a convenient digital interface for a user’s own
sensor design PCB or module containing the AD7191.
Alternatively, an external microcontroller can be interfaced to
the AD7191 and, thus, the evaluation board can act as a
complete analog front end for creating and debugging software
on the user’s own digital platform.
EVALUATION BOARD CONNECTION DIAGRAM
NOISE TEST
CIRCUITRY
SENSOR
CONNECTOR
VOLTAGE
REGULATOR
VOLTAGE
REGULATOR
VOLTAGE
REFERENCE
SPI/USB
INTERFACE
MICRO
DRIVERS LCD
ANALOG
INPUTS
EXT
BATT
REFIN
AD7191
PC
AND
LabVIEW™
BASED
SOFTWARE
09880-001
Figure 1. AD7191 Evaluation Board
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