EVAL-AD7687CBZ Analog Devices Inc, EVAL-AD7687CBZ Datasheet

BOARD EVALUATION FOR AD7687

EVAL-AD7687CBZ

Manufacturer Part Number
EVAL-AD7687CBZ
Description
BOARD EVALUATION FOR AD7687
Manufacturer
Analog Devices Inc
Series
PulSAR®r
Datasheet

Specifications of EVAL-AD7687CBZ

Number Of Adc's
1
Number Of Bits
16
Sampling Rate (per Second)
250k
Data Interface
Serial
Inputs Per Adc
1 Differential
Input Range
±VREF
Power (typ) @ Conditions
4mW @ 5 V, 100kSPS
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
AD7687
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Preliminary Technical Data
FEATURES
Versatile analog signal conditioning circuitry
On-board reference, crystal oscillator and buffers
16-bit Parallel Buffered Outputs
Ideal for DSP and data acquisition card interfaces
Analog and digital prototyping area for breadbording the
target system
Stand-alone operation or Eval control board compatibility
PC software for control and data analysis
LabVIEW
GENERAL DESCRIPTION
The EVAL-AD76XXCB 8/10-Pin is an evaluation board for the
AD768x/AD769x/AD794x/AD798x 8 and 10-pin PulSAR high
resolution ADCs (see the Ordering Guide at the end of this
document for a product list).
The evaluation board is designed to demonstrate the ADC's
performance and to provide an easy to understand interface for
a variety of system applications. A full description of the
Rev. Pr G
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.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
1
driver to develop custom application
Figure 1.
AD768x/AD769x/AD794x/AD798x
AD768x/AD769x/AD794x/AD798x is available at
www.analog.com
evaluation board.
The evaluation board is ideal for use with either Analog Devices
EVAL-CONTROL BRD2/BRD3 (EVAL-CONTROL BRDx),
DSP based controller board, to run the Analog devices
evaluation software and to develop a specific application using
LabVIEW, or as a stand-alone evaluation board.
The EVAL-CONTROL BRDx is sold separately from the
evaluation board, is required to run the evaluation software, is
not required in stand alone mode and can be reused with many
Analog Devices ADCs.
1
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
Labview is a trademark of National Instruments.
EVAL-AD76XXCB 8/10-Pin
and should be consulted when utilizing this
Evaluation Board For
© 2007 Analog Devices, Inc. All rights reserved.
www.analog.com

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EVAL-AD7687CBZ Summary of contents

Page 1

... AD768x/AD769x/AD794x/AD798x is available at www.analog.com and should be consulted when utilizing this evaluation board. The evaluation board is ideal for use with either Analog Devices EVAL-CONTROL BRD2/BRD3 (EVAL-CONTROL BRDx), DSP based controller board, to run the Analog devices evaluation software and to develop a specific application using LabVIEW stand-alone evaluation board. ...

Page 2

... EVAL-AD76XXCB 8/10-Pin TABLE OF CONTENTS Detailed Description .................................................................... 3 Using the EVAL-AD768x/AD769x/AD794xCB Software ...... 3 Testing Methods ........................................................................... 3 REVISION HISTORY 03/07—PrG Version 02/06—PrF Version 05/05—PrE Version Preliminary Technical Data Use as a Standalone Evaluation Board........................................4 Ordering Guide .......................................................................... 18 ESD Caution................................................................................ 18 Rev Page ...

Page 3

... EVAL-CONTROL BRDx and a 26-pin IDC connector for the serial output interface. The evaluation board is a four-layer board carefully laid out and tested to demonstrate the specific high accuracy performance of the AD768x/ AD769x/AD794x/AD798x. Figure 2 through Figure 5 show the schematics of the evaluation board. The ...

Page 4

... Preliminary Technical Data Use as a Standalone Evaluation Board You have the option of using the evaluation board as a stand- alone. This method does not require the EVAL-CONTROL BRDx, nor does it require use of the accompanied software. The ADC serial interface signals are available on P1 (26-pin connector) ...

Page 5

... V JP7 7 V JP8 12 V JP9 VDD JP10 +VA, +2.5V (for AD798x) JP11 3.3 V JP13 BUF+ JP25 BUF- Table 2. EVAL-AD768x/AD769x/AD794xCB Test Points Test Point TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 Function Selection of the IN+ analog signal of U1 and U8, ADC0 and ADC1. ...

Page 6

... EVAL-AD76XXCB 8/10-Pin 8 4 GND 2 2.5/3v +VIN 8 2 GND 4 OVDD VDD REF GND Figure 2. Schematic (Analog section) Rev Page Preliminary Technical Data VDD 8 REF GND ...

Page 7

... Preliminary Technical Data Figure 3. Schematic (Digital Section) Rev Page EVAL-AD76XXCB 8/10-Pin ...

Page 8

... EVAL-AD76XXCB 8/10-Pin GND GND 5 Figure 4. Schematic (Power Section) Rev Page Preliminary Technical Data VDD GND GND GND 5 ...

Page 9

... Preliminary Technical Data 3 6 GND VDD DOUT 14 SCK DIN SYNC OVDD VDD VDD 8 REF GND REF GND 1 Figure 5. Schematic (Option Section) Rev Page EVAL-AD76XXCB 8/10-Pin ...

Page 10

... EVAL-AD76XXCB 8/10-Pin Figure 6. Top-Side Silk-Screen (Not to Scale). Figure 7. Top-Side (Not to Scale). Rev Page Preliminary Technical Data ...

Page 11

... Preliminary Technical Data Figure 8. Ground Layer (Not to Scale). Figure 9. Shield Layer (Not to Scale). Rev Page EVAL-AD76XXCB 8/10-Pin ...

Page 12

... EVAL-AD76XXCB 8/10-Pin Figure 10. Bottom-Side Layer (Not to Scale). Figure 11. Bottom-Side Silk-Screen (Not to Scale). Rev Page Preliminary Technical Data ...

Page 13

... This is the performance window. These controls are for locking and resetting the display axis to the data minimum and maximum values. 6) These gives direct access to datasheets and evaluation documentation. 5) This window allows the samples to be taken once (F3) or continuous (F4). Also selects: Help screen, Save data to Excel (F5), Print (F8) and Quit (F10). ...

Page 14

... EVAL-AD76XXCB 8/10-Pin These control the choice of chart type and X-units. Chart type selection of Histogram or Time and X-units of hexadecimal or Volts. The results are displayed in this chart. Also, the cursor (yellow) can be dragged desired location where the X-axis values and the Y-axis value will be displayed. ...

Page 15

... X-axis values and the Y-axis value will be displayed. Choice of either a Kaiser window or a Blackmann- Harris window from the is menu. Figure 14. FFT Screen Rev Page EVAL-AD76XXCB 8/10-Pin AC test results are displayed here. Also the choice of viewing the amplitude of a certain FFT component can be selected from the FFT component menu. ...

Page 16

... EVAL-AD76XXCB 8/10-Pin The AC test can also be displayed in the Time Domain as shown below. To view the Time domain output, select Time in this menu. Figure 15. Time-Domain Screen Rev Page Preliminary Technical Data ...

Page 17

... X-axis values and the Y-axis value will be displayed. The decimation ratio (Dratio) and number of Ksamples are entered here. The Nyquist frequency is displayed here as: F NYQUIST Figure 16. Decimated (Averaging) Screen Rev Page EVAL-AD76XXCB 8/10-Pin F = SAMPLE RATIO ...

Page 18

... EVAL-AD76XXCB 8/10-Pin The term AD768x/AD769x/AD794x/AD798x is used in this document to represent all the ADCs listed in the ordering guide. ORDERING GUIDE Evaluation Board Model EVAL-AD7683CBZ EVAL-AD7684CBZ EVAL-AD7685CBZ EVAL-AD7686CBZ EVAL-AD7687CBZ EVAL-AD7688CBZ EVAL-AD7690CBZ EVAL-AD7691CBZ EVAL-AD7693CBZ EVAL-AD7694CBZ EVAL-AD7942CBZ EVAL-AD7946CBZ EVAL-AD7980CBZ EVAL-AD7982CBZ EVAL-CONTROL BRD2 EVAL-CONTROL BRD3 ESD CAUTION ESD (electrostatic discharge) sensitive device ...

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