EVAL-AD7799EBZ Analog Devices Inc, EVAL-AD7799EBZ Datasheet

BOARD EVALUATION FOR AD7799

EVAL-AD7799EBZ

Manufacturer Part Number
EVAL-AD7799EBZ
Description
BOARD EVALUATION FOR AD7799
Manufacturer
Analog Devices Inc
Datasheets

Specifications of EVAL-AD7799EBZ

Number Of Adc's
1
Number Of Bits
24
Sampling Rate (per Second)
470
Data Interface
Serial
Inputs Per Adc
3 Differential
Input Range
±VREF/gain
Power (typ) @ Conditions
2.5mW @ 470SPS
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 105°C
Utilized Ic / Part
AD7799
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
Full-featured evaluation board for the AD7799
Standalone USB interface
Various linking options
PC software for control of AD7799
GENERAL DESCRIPTION
This data sheet describes the evaluation board for the AD7799
low power, 24-bit ∑-Δ ADC. The AD7799 is a complete analog
front end for low frequency measurement applications. It
contains three differential inputs and includes a low noise
instrumentation amplifier, a reference detect, and a low-side
power switch.
Features include an update rate that can be varied from 4.17 Hz
to 470 Hz, an on-board clock that eliminates the need for an
external clock, and a ∑-Δ conversion technique that allows
attainment of up to 24 bits of no missing codes performance.
The input signal is applied to an analog modulator, and the
modulator output is processed by an on-chip digital filter. The
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. 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. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
ANALOG
TEMPERATURE
INPUTS
SENSOR
FUNCTIONAL BLOCK DIAGRAM
Low Power Sigma-Delta ADC (3 Channels)
Evaluation Board for the AD7799 24-Bit,
AD7799
REFIN(±)
AVDD
REGULATOR
Figure 1.
VOLTAGE
INTERFACE
SPI/USB
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
analog input channel of the AD7799 accepts analog input
signals of ±V
the gain is 64 and the update rate is programmed to 16.7 Hz, the
rms noise is 65 nV. Simultaneous 50 Hz/60 Hz rejection is also
available at this data update rate.
Full data on the AD7799 is available in the
available from Analog Devices, Inc., and should be consulted in
conjunction with this document when using the evaluation board.
The evaluation board interfaces to the USB port of an IBM-
compatible PC. Software is available with the evaluation board
that allows the user to easily communicate with the AD7799.
The AD7799 evaluation board software should be installed
before connecting the AD7799 evaluation board to the PC.
Other components on the AD7799 evaluation board include the
ADP3303, which is a high precision, low power, 3.3 V output
voltage regulator used to power the USB/SPI interface.
PC AND LabVIEW ™
SOFTWARE
BASED
REF
/gain, with a gain in the range of 1 to 128. When
©2008 Analog Devices, Inc. All rights reserved.
EVAL-AD7799
AD7799
www.analog.com
data sheet,

Related parts for EVAL-AD7799EBZ

EVAL-AD7799EBZ Summary of contents

Page 1

... Rev. 0 Evaluation boards are only intended for device evaluation and not for production purposes. Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or statutory including, but not limited to, any implied warranty of merchantability or fitness for a particular purpose. No license is granted by implication or otherwise under any patents or other intellectual property by application or use of evaluation boards ...

Page 2

... Installing the Software ..................................................................5   Using the Software ........................................................................5   Main Window ................................................................................6   Registers Window .........................................................................8   Other Registers Window ..............................................................9   Temp Demo Window ................................................................ 10   Evaluation Board Schematic and Artwork .................................. 11   Ordering Information .................................................................... 15   Bill of Materials ........................................................................... 15   Ordering Guide .......................................................................... 15   ESD Caution................................................................................ 15   Rev Page   ...

Page 3

... Table 3. SETTING UP THE EVALUATION BOARD Care should be taken before applying power and signals to the evaluation board to ensure that all link positions are as per the required operating mode. Table 2 shows the position in which the links are set when the evaluation board is shipped. ...

Page 4

... EVAL-AD7799 INTERFACING TO THE EVALUATION BOARD Interfacing to the evaluation board is via a standard USB connector, J1 used to connect the evaluation board to the USB port of a PC. A standard USB connector cable is included with the AD7799 evaluation board to allow the evaluation board to interface with the USB port of the PC. Because the board is powered via the USB connector, there is no need for an external power supply, although one can be connected via J3 if preferred ...

Page 5

... EVALUATION BOARD SOFTWARE SOFTWARE DESCRIPTION The AD7799 evaluation board is shipped with a CD-ROM con- taining software that can be installed onto a standard PC to control the AD7799. The software uses the USB of the PC to communicate with the AD7799 via the cable provided with the board. ...

Page 6

... EVAL-AD7799 MAIN WINDOW Menu Bar File Allows the user to read previously stored data for display or analysis, write the current set of data to a file for later use, and exit the program. About Provides information on the revision of software being used. Buttons Reset Allows the user to reset the AD7799 and set the registers to the power-up conditions as specified by the software (channel = AIN1(− ...

Page 7

... Figure 3. AD7799 Evaluation Software Main Window Rev Page EVAL-AD7799 ...

Page 8

... IO register. Figure 4 shows the Registers window. This window allows the customer to change the update rate, gain, low-side power switch, and so on. Consult the further details on the bit functions. Figure 4. AD7799 Evaluation Software Registers Window Rev Page AD7799 data sheet for ...

Page 9

... ID register, full-scale calibration register, and status register. To write to the offset and full-scale calibration registers, the user must place the AD7799 in power-down or idle mode using the Mode box in the Registers window (see Figure 4). Figure 5. AD7799 Evaluation Software Other Registers Window Rev Page EVAL-AD7799 ...

Page 10

... AIN2(+)/AIN2(−) channel and converts the result to temperature using a look-up table. To exit the temperature demonstration, click Back. The software sets the configuration register, mode register, and IO register to their pretemperature demonstration values. Figure 6. AD7799 Evaluation Software Temperature Demo Window Rev Page ...

Page 11

... EVALUATION BOARD SCHEMATIC AND ARTWORK Figure 7. AD7799 Evaluation Board Schematic Rev Page EVAL-AD7799 07431-007 ...

Page 12

... EVAL-AD7799 Figure 8. AD7799 Evaluation Board—Component Layout Diagram Rev Page ...

Page 13

... Figure 9. AD7799 Evaluation Board—Component Side Artwork Rev Page EVAL-AD7799 ...

Page 14

... EVAL-AD7799 Figure 10. AD7799 Evaluation Board—Solder Side Artwork Rev Page ...

Page 15

... At LK1 to LK10 Connectors 4 AIN1+, AIN1−, REFIN1+, REFIN1− ORDERING GUIDE Model Description 1 EVAL-AD7799EBZ Evaluation Board RoHS Compliant Part. Description Manufacturer/Part No. AD7799BRUZ Analog Devices USB Controller Cypress Semiconductor Corporation, CY7C68013A-56LFXC 24LC64 Microchip Technology Inc., 24LC64-I/SN ADP3303ARZ-3.3 Analog Devices 24 MHz Crystal ...

Page 16

... EVAL-AD7799 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB07431-0-4/08(0) Rev Page ...

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