16-Bit, 400 MSPS
Digital-to-Analog Converter
AD9726
Rev. B
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FEATURES
Dynamic performance
SFDR ≥ 78 dBc at f
OUT
= 20 MHz
IMD ≥ 82 dBc at f
OUT
= 70 MHz
ACLR ≥ 76 dBc at f
OUT
= 70 MHz
NSD ≤ −160 dB/Hz at f
OUT
= 70 MHz
Precision calibrated linearity
DNL ≤ ±0.5 LSB at +25°C
INL ≤ ±1.0 LSB at +25°C
THD ≤ −95 dB at f
OUT
= 1 MHz
LVDS inputs with internal 100 Ω terminations
Automatic data/clock timing synchronization
Single data rate or double data rate capable
Differential current outputs
Internal precision reference
Operates on 2.5 V and 3.3 V supplies
Extended industrial temperature range
Thermally enhanced, 80-lead, RoHS-compliant
TQFP_EP package
APPLICATIONS
Instrumentation
Test equipment
Waveform synthesis
Communications systems
FUNCTIONAL BLOCK DIAGRAM
INTERNAL
REFERENCE
CALIBRATION
MEMORY
LVDS OUTPUT
DRIVER
DATA SYNCHRONIZATION
LVDS INPUT DATA CAPTURE
SPI
CSB
SDIO
SDO
RESET
IOUTA
IOUTB
REFIO
FSADJ
SCLK
CLK+
CLK–
DCLK_OUT+
DCLK_OUT–
DB[15]+
DB[15]–
DB[0]+
DB[0]–
DCLK_IN+
DCLK_IN–
CLOCK DISTRIBUTION
AND CONTROL
16-BIT
DAC
04540-001
Figure 1.
.
GENERAL DESCRIPTION
The AD9726 is a 16-bit digital-to-analog converter (DAC)
that offers leading edge performance at conversion rates of up
to 400 MSPS. The device uses low voltage differential signaling
(LVDS) inputs and includes internal 100 Ω terminations. The
analog output can be single-ended or differential current. An
internal precision reference is included.
The AD9726 also features synchronization logic to monitor and
optimize the timing between incoming data and the sample clock.
This reduces system complexity and simplifies timing require-
ments. An LVDS clock output is also available to drive an external
data pump in either single data rate (SDR) or double data rate
(DDR) mode.
All device operation is fully programmable using the flexible
serial port interface (SPI). The AD9726 is also fully functional
in its default state for applications without a controller.
PRODUCT HIGHLIGHTS
1. A unique combination of precision and performance
makes the AD9726 equally suited to applications with
demanding frequency domain or demanding time domain
requirements.
2. Nonvolatile factory calibration assures a highly linear
transfer function. Internal logic offers on demand self-
calibration for linearity even at extended operating
temperatures.
3. Proprietary architecture minimizes data dependent,
discrete mixing spurs and offers enhanced dynamic
performance over a wide range of output frequencies.
High input data rates create a very high frequency
synthesis bandwidth.
4. The fully automatic, transparent synchronizer maintains
optimized timing between clock and data in real time and
offers programmable control options for added flexibility.
5. Full-scale output current is external resistor programmable.
AD9726* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
EVALUATION KITS
AD9726 Evaluation Board
DOCUMENTATION
Application Notes
AN-320A: CMOS Multiplying DACs and Op Amps Combine
to Build Programmable Gain Amplifier, Part 1
AN-808: Multicarrier CDMA2000 Feasibility
AN-834: AD9786/AD9726 Calibration Engine
AN-912: Driving a Center-Tapped Transformer with a
Balanced Current-Output DAC
Data Sheet
AD9726: 16-Bit, 400 MSPS Digital-to-Analog Converter
Data Sheet
REFERENCE MATERIALS
Solutions Bulletins & Brochures
Digital to Analog Converters ICs Solutions Bulletin
Digital-to-Analog Converter ICs Solutions Bulletin, Volume
10, Issue 1
Test & Instrumentation Solutions Bulletin, Volume 10,
Issue 3
DESIGN RESOURCES
AD9726 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
View all AD9726 EngineerZone Discussions.
SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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AD9726
Rev. B | Page 2 of 24
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 .......................................................................... 4
Digital Signal Specifications ........................................................ 5
Timing Specifications .................................................................. 5
Timing Diagrams .......................................................................... 6
Absolute Maximum Ratings ............................................................ 8
Thermal Resistance ...................................................................... 8
ESD Caution .................................................................................. 8
Pin Configuration and Function Descriptions ............................. 9
Terminology .................................................................................... 11
Typical Performance Characteristics ........................................... 12
Serial Port Interface ........................................................................ 15
Theory of Operation ...................................................................... 17
DAC Clock and Data Clock Output ........................................ 17
Data Clock Input ........................................................................ 17
Data Synchronization Circuitry ............................................... 18
Analog Output ............................................................................ 18
Internal Reference and Full-Scale Output .............................. 19
Reset ............................................................................................. 19
Serial Port Interface ................................................................... 19
SPI Pin Description .................................................................... 20
Calibration ................................................................................... 20
Sync Logic Operation and Programming ............................... 22
Outline Dimensions ....................................................................... 24
Ordering Guide .......................................................................... 24
REVISION HISTORY
2/10—Rev. A to Rev. B
Changes to Table 4 ............................................................................ 5
Added Figure 4 and Figure 5, Renumbered Sequentially ........... 6
Changes to Figure 5 and Table 7 ..................................................... 9
Changes to Table 9 .......................................................................... 16
Added Data Synchronization Circuitry Bypass Section ............ 18
Changes to Ordering Guide .......................................................... 24
11/05—Rev. 0 to Rev. A
Changes to Features .......................................................................... 1
Changes to Table 3 and Table 4 ....................................................... 5
Changes to the Terminology Section ........................................... 10
Changes to the Driving the DAC Clock Inputs Section ............ 15
Changes to the Reset and Serial Port Interface Sections ........... 17
Updated Outline Dimensions ....................................................... 22
Changes to the Ordering Guide ................................................... 22
7/05—Revision 0: Initial Version

AD9726BSVZ

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC 16-Bit 400 MSPS
Lifecycle:
New from this manufacturer.
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