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Analog Devices Semiconductor Electronic Components Datasheet



AD12401

400 MSPS A/D Converter



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FEATURES
Up to 400 MSPS sample rate
SNR of 63 dBFS @128 MHz
SFDR of 70 dBFS @128 MHz
VSWR of 1:1.5
High or low gain grades
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 beams
Multichannel, multimode receivers
Secure communications
Wireless and wired broadband communications
Wideband carrier frequency systems
GENERAL DESCRIPTION
The AD12401 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 up to
400 MSPS conversion rate with outstanding dynamic performance
in wideband carrier systems.
The AD12401 requires a 3.7 V analog supply and 3.3 V 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 AD12401 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.
12-Bit, 400 MSPS A/D Converter
AD12401
FUNCTIONAL BLOCK DIAGRAM
AD12401
DATA
READY
A
ADC
A
DA0–DA11
POST-
CLK DISTRIBUTION PROCESSING
DB0–DB11
AIN
ADC
B
DR_EN
CLOCK DISTRIBUTION
DIVIDE BY 2
DATA
READY
B
ENC
ENC
OROUT
Figure 1.
PRODUCT HIGHLIGHTS
1. Guaranteed sample rate up to 400 MSPS.
2. Input signal conditioning with optimized dynamic
performance to 175 MHz.
3. High and low gain grades available.
4. Additional performance options available (sample rates
>400 MSPS or second Nyquist zone operation); contact
sales.
5. Proprietary Advanced Filter Bank (AFB™) digital post-
processing 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.
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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AD12401
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
DC Specifications ......................................................................... 3
AC Specifications—ENCODE = 400 MSPS.............................. 4
AC Specifications—ENCODE = 360 MSPS.............................. 5
AC Specifications—ENCODE = 326 MSPS.............................. 6
Absolute Maximum Ratings............................................................ 8
Explanation of Test Levels ........................................................... 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions........................... 10
Terminology .................................................................................... 13
Typical Performance Characteristics ........................................... 15
Theory of Operation ...................................................................... 18
REVISION HISTORY
4/06—Rev. 0 to Rev. A
Changes to Features and Product Highlights ............................... 1
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 4
Changes to Table 4............................................................................ 6
Changes to Table 7............................................................................ 9
Changes to Figure 5........................................................................ 10
Changes to Table 9.......................................................................... 11
Added Gain Select Section ............................................................ 20
Added H/L_GAIN Section............................................................ 21
Changes to Figure 25...................................................................... 23
Changes to the Ordering Guide.................................................... 28
7/05—Revision 0: Initial Version
Time-Interleaving ADCs........................................................... 18
Analog Input ............................................................................... 18
Clock Input.................................................................................. 18
Digital Outputs ........................................................................... 19
Power Supplies............................................................................ 19
Start-Up and RESET .................................................................. 19
DR_EN......................................................................................... 19
Overrange.................................................................................... 19
Gain Select................................................................................... 20
Thermal Considerations............................................................ 20
Package Integrity/Mounting Guidelines ................................. 20
AD12401 Evaluation Kit ........................................................... 21
Data Outputs............................................................................... 21
Layout Guidelines........................................................................... 26
PCB Interface .............................................................................. 26
Outline Dimensions ....................................................................... 28
Ordering Guide .......................................................................... 28
Rev. A | Page 2 of 28



Part Number AD12401
Description 400 MSPS A/D Converter
Maker Analog Devices - Analog Devices
Total Page 28 Pages
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