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AD12400

12-Bit 400 MSPS A/D Converter


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AD12400 pdf
12-Bit, 400 MSPS A/D Converter
FEATURES
400 MSPS sample rate
SNR of 63 dBFS @128 MHz
SFDR of 70 dBFS @128 MHz
VSWR of 1:1.5
Wideband ac-coupled input signal conditioning
Enhanced spurious-free dynamic range
Single-ended or differential encode signal
LVDS output levels
Twos complement output data
APPLICATIONS
Communications test equipment
Radar and satellite subsystems
Phased array antennas—digital beam
Multichannel, multimode receivers
Secure communications
Wireless and wired broadband communications
Wideband carrier frequency systems
GENERAL DESCRIPTION
The AD12400 is a 12-bit analog-to-digital converter (ADC)
with a transformer-coupled analog input and digital post-
processing for enhanced SFDR. The product operates at a 400
MSPS conversion rate with outstanding dynamic performance
in wideband carrier systems.
The AD12400 requires 3.8 V analog, 3.3 V digital, and 1.5 V
digital supplies, and provides a flexible encode signal that can
be differential or single-ended. No external reference is
required.
The AD12400 package style is an enclosed 2.9" × 2.6" × 0.6"
module. Performance is rated over a 0°C to 60°C case
temperature range.
AD12400
FUNCTIONAL BLOCK DIAGRAM
AD12400
DATA
READY
A
ADC
A
DA0–DA11
POST-
CLK DISTRIBUTION PROCESSING
AIN
ADC
B
DB0–DB11
CLOCK DISTRIBUTION
DIVIDE BY 2
DATA
READY
B
ENC
ENC
Figure 1.
PRODUCT HIGHLIGHTS
1. Guaranteed sample rate of 400 MSPS.
2. Input signal conditioning with optimized dynamic
performance to 180 MHz.
3. Additional performance options available; contact factory.
4. Proprietary Advanced Filter Bank (AFB™) digital
postprocessing from V Corp Technologies, Inc.
Rev. A
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.
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
©2005 Analog Devices, Inc. All rights reserved.



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AD12400 pdf
AD12400
TABLE OF CONTENTS
Specifications..................................................................................... 3
DC Specifications ......................................................................... 3
AC Specifications.......................................................................... 4
Absolute Maximum Ratings............................................................ 5
Explanation of Test Levels ........................................................... 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 7
Terminology ...................................................................................... 9
Typical Performance Characteristics ........................................... 11
Theory of Operation ...................................................................... 13
Time-Interleaving ADCs........................................................... 13
Analog Input ............................................................................... 13
Clock Input.................................................................................. 13
REVISION HISTORY
6/05—Rev. 0 to Rev. A
Changes to Table 2............................................................................ 4
Changes to Figure 3.......................................................................... 6
Changes to Table 5............................................................................ 6
Renamed Definition of Specifications Section to
Terminology Section ........................................................................ 9
Changes to LEAD/LAG Section ................................................... 14
Changes to Ordering Guide .......................................................... 22
11/03—Revision 0: Initial Version
Digital Outputs ........................................................................... 14
Power Supplies............................................................................ 14
Start-Up and RESET .................................................................. 14
LEAD/LAG ................................................................................. 14
Thermal Considerations............................................................ 14
Package Integrity/Mounting Guidelines ................................. 15
AD12400 Evaluation Kit ........................................................... 16
Layout Guidelines........................................................................... 21
PCB Interface .............................................................................. 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 22
Rev. A | Page 2 of 24



Part Number AD12400
Description 12-Bit 400 MSPS A/D Converter
Maker Analog Devices - Analog Devices
Total Page 24 Pages
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