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Analog Devices Semiconductor Electronic Components Datasheet



AD10678

16-Bit/ 80 MSPS A/D Converter



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FEATURES
80 MSPS sample rate
80 dBFS signal-to-noise ratio
Transformer-coupled analog input
Single PECL clock source
Digital outputs
True binary format
3.3 V and 5 V CMOS-compatible
APPLICATIONS
Low signature radar
Medical imaging
Communications instrumentation
Instrumentation
Antenna array processing
GENERAL DESCRIPTION
The AD10678 is a 16-bit, high performance, analog-to-digital
converter (ADC) for applications that demand increased SNR
levels. Exceptional noise performance and a typical signal-to-
noise ratio of 80 dBFS are obtained by digitally postprocessing
the outputs of four ADCs. A single analog input and PECL
sampling clock and 3.3 V and 5 V power supplies are required.
The AD10678 is assembled using a 0.062-inch laminate board
with three sets of connector interface pads to accommodate
analog and digital isolation. Analog Devices recommends
using the FSI-110-03-G-D-AD-K-TR connector from Samtec.
The overall board fits a 2.2 inch × 2.8 inch PCB specified from
0°C to 70°C.
16-Bit, 80 MSPS A/D Converter
AD10678
FUNCTIONAL BLOCK DIAGRAM
AIN
AIN
ANALOG
POWER
AGND
5VA
3.3VE
AGND
AD10678
ADC
14
DOUT0
ADC
ADC
ADC
14
DIGITAL
POST-
PROCES-
14 SING
DOUT15
14
OUTPUT
DATA
BITS
DRY
CLOCK DISTRIBUTION
CIRCUIT
DGND 3.3V DGND
ENCODE ENCODE DIGITAL POWER
Figure 1.
PRODUCT HIGHLIGHTS
1. Guaranteed sample rate of 80 MSPS.
2. Input signal conditioning with optimized noise
performance.
3. Fully tested and guaranteed performance.
Rev. C
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.



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AD10678
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Table of Contents .............................................................................. 2
Revision History ........................................................................... 2
Specifications..................................................................................... 3
DC Specifications ......................................................................... 3
Digital Specifications ................................................................... 3
AC Specifications.......................................................................... 4
Switching Specifications .............................................................. 5
Absolute Maximum Ratings............................................................ 6
Explanation of Test Levels ........................................................... 6
Operating Range........................................................................... 6
ESD Caution.................................................................................. 6
REVISION HISTORY
5/06—Rev. B to Rev. C
Changes to Figure 9.......................................................................... 9
Edits to Table 8................................................................................ 15
Edits to Figure 22.......................................................................... 16
3/05—Rev. A to Rev. B
Changes to Figure 1.......................................................................... 1
Changes to Figure 2 and Figure 3................................................... 7
Added Figure 7 to Figure 9.............................................................. 8
Reformatted Table 7 ......................................................................... 8
Changes to Figure 10........................................................................ 9
Reformatted Theory of Operation Section ................................. 13
Changes to Figure 22...................................................................... 15
12/03—Rev. 0 to Rev. A
Updated format...................................................................Universal
Changes to AC Specifications Table Footnotes ............................ 4
Changes to Table 1............................................................................ 3
Changes to Table 3............................................................................ 6
Changes to Figure 11...................................................................... 10
Changes to Theory of Operation.................................................. 13
Changes to Ordering Guide .......................................................... 20
2/03—Revision 0: Initial Version
Test Circuits........................................................................................7
Pin Configurations and Function Descriptions ............................8
Typical Performance Characteristics ........................................... 10
Terminology .................................................................................... 12
Theory of Operation ...................................................................... 13
Thermal Considerations............................................................ 13
Input Stage................................................................................... 13
Encoding the AD10678 ............................................................. 13
Output Loading .......................................................................... 13
Analog and Digital Power Supplies.......................................... 13
Analog and Digital Grounding................................................. 14
Other Notes................................................................................. 14
Evaluation Board ........................................................................ 14
Outline Dimensions ....................................................................... 19
Ordering Guide .......................................................................... 19
Rev. C | Page 2 of 20



Part Number AD10678
Description 16-Bit/ 80 MSPS A/D Converter
Maker Analog Devices - Analog Devices
Total Page 20 Pages
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