AD9857: CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter

AD9857 Data Sheet Rev C, 05/2004 (pdf 1065kB)

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Model	Package	Price* (100-499)	Price* 1000 pcs
AD9857ASTZ Status: Production	80 ld LQFP (14x14mm)	$21.48	$17.31

The AD9857 integrates a high-speed direct-digital synthesizer (DDS), a high-performance, high-speed 14-bit digital-to-analog converter (DAC), clock multiplier circuitry, digital filters, and other DSP functions onto a single chip, to form a complete quadrature digital upconverter device. The AD9857 is intended to function as a universal I/Q modulator and agile upconverter, single-tone DDS, or interpolating DAC for communications applications, where cost, size, power dissipation, and dynamic performance are critical attributes.

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FEATURES and BENEFITS

200 MHz internal clock rate
14-bit data path
Excellent dynamic performance: 80 dB SFDR @ 65 MHz (±100 kHz) A_OUT
4× to 20× programmable reference clock multiplier
Reference clock multiplier PLL lock detect indicator
Internal 32-bit quadrature DDS
FSK capability

8-bit output amplitude control
Single-pin power-down function
Four programmable, pin-selectable
signal profiles
SIN(x)/x correction (inverse
SINC function)
Simplified control interface
10 MHz serial, 2-wire or 3-wire
SPI®-compatible

Functional Block Diagram for AD9857

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Documentation

Title	Content Type	File Type
AD9857: CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter Data Sheet (Rev C, 05/2004) (pdf, 1065 kB)	Data Sheets	PDF
AN-924: Digital Quadrature Modulator Gain (pdf, 105 kB)	Application Notes	PDF
AN-0996: The Advantages of Using a Quadrature Digital Upconverter (QDUC) in Point-to-Point Microwave Transmit Systems (pdf, 219 kB)	Application Notes	PDF
AN-922: Digital Pulse-Shaping Filter Basics (pdf, 1582 kB)	Application Notes	PDF
AN-837: DDS-Based Clock Jitter Performance vs. DAC Reconstruction Filter Performance (pdf, 313 kB)	Application Notes	PDF
AN-823: Direct Digital Synthesizers in Clocking Applications Time (pdf, 115 kB) Jitter in Direct Digital Synthesizer-Based Clocking Systems	Application Notes	PDF
AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (pdf, 262 kB)	Application Notes	PDF
AN-237: Choosing DACs for Direct Digital Synthesis (pdf, 1156 kB)	Application Notes	PDF
A Technical Tutorial on Digital Signal Synthesis (pdf, 901 kB) Copyright © 1999 Analog Devices, Inc.	Design Handbooks	PDF
Fundamentals of Frequency Synthesis, Part 2: Direct Digital Synthesis (DDS) This month we conclude our two-part series on frequency synthesis, with an introduction to Direct Digital Synthesis. We will give a basic review of how a direct digital synthesis system works, touching on the inner workings of the DDS engine at a relatively high level. We will also discuss the tradeoffs between PLL and DDS technology as a base choice for frequency synthesis needs.	Webcasts	WEBCAST
Performance Clocks: Demystifying Jitter Join us as we delve into the realm of sub-picosecond jitter clocks. The relationship between jitter and phase noise will be explored in detail and methods for measuring sub-picosecond jitter and ultra low phase noise will be presented and discussed.	Webcasts	WEBCAST
Speedy A/Ds Demand Stable Clocks by Jeff Keip, Analog Devices, Inc. (EE Times, 3/18/04)	Technical Articles	HTML
Improved DDS Devices Enable Advanced Comm Systems by Valoree Young, Analog Devices (Electronic Products, September 2006)	Technical Articles	HTML
Introducing Digital Up/Down Converters: VersaCOMM™ Reconfigurable Digital Converters (pdf, 63 kB) Revolutionize your radio architectures	Technical Articles	PDF
Digital Up/Down Converters: VersaCOMM™ White Paper (pdf, 97 kB)	Technical Articles	PDF
Basics of Designing a Digital Radio Receiver (Radio 101) (pdf, 77 kB)	Technical Articles	PDF
The Year of the Waveform Generator (Test & Measurement World, 12/1/2005)	Technical Articles	HTML
DDS Simplifies Polar Modulation By Ken Gentile, Analog Devices ... Basic modulation mathematics and DDS (direct digital synthesis) provide designers with an all-digital technique for generating polar-encoded carrier signals. (EDN, 8/5/2004)	Technical Articles	HTML
Digital Upconverter IC Tames Complex Modulation (pdf, 837 kB) by Ken Gentile, Analog Devices, Inc. ... An improved 14-bit architecture, simplified synchronization, and enhanced power-saving circuitry are a few of the features of this quadrature digital upconverter. (Reprinted with permission of Microwaves & RF where it first appeared in the August 2000 issue)	Technical Articles	PDF
Ask The Application Engineer—33: All About Direct Digital Synthesis (Analog Dialogue, Vol. 38, August 2004)	Analog Dialogue	HTML
Free Direct Digital Synthesis IC Evaluation Tool (Control Engineering, 9/14/2006)	Product Reviews	HTML
On-Line Evaluation Tool Simplifies Implementing DDS Semiconductors (eeProductCenter, 8/16/2006)	Product Reviews	HTML
Are there any specific recommendations for material in the vias of the circuit board for the thermally enhanced package styles in which some ADI DDS' are available?	FAQs/RAQs	HTML
I have limited experience working with thermally enhanced packages. Where can I get information concerning the proper techniques for soldering and assembly?	FAQs/RAQs	HTML
I need to operate my DDS part above the rated temperature range. Can you give me any reliability data?	FAQs/RAQs	HTML
Are any of your DDS products space qualified?	FAQs/RAQs	HTML
Why did the model numbers change on the AD9852 and AD9854 products? I thought they were available in the ASQ package.	FAQs/RAQs	HTML
If the port has a differential REF CLK, and I want to use a single-ended clock, what do I do with the other differential input?	FAQs/RAQs	HTML
If I violate the proper logic level of the REF CLK (that is, underdrive or overdrive it), what can I expect?	FAQs/RAQs	HTML
What type of signal source is recommended?	FAQs/RAQs	HTML
Why does spectral performance degrade when using larger values of multiplication on the clock multiplier?	FAQs/RAQs	HTML
Can the DDS evaluation boards be integrated directly into a system project?	FAQs/RAQs	HTML
I am having problems getting my evaluation software to see my evaluation board; what should I do to correct the problem?	FAQs/RAQs	HTML
Is all DDS software supplied by Analog Devices compatible with all WinXX versions?	FAQs/RAQs	HTML
What is the proper termination for the DAC outputs for the DDS products?	FAQs/RAQs	HTML
Why can't I see a signal at the output of my DDS when it is unterminated? (I'm setting everything correctly, but I'm just probing the output pins of the DDS which have nothing connected to them.)	FAQs/RAQs	HTML
How can I synchronize multiple DDS parts?	FAQs/RAQs	HTML
Can I gate the REF CLK on and off?	FAQs/RAQs	HTML
What kind of problems can I expect from exceeding the maximum clock rate? (power dissipation, spectral problems)	FAQs/RAQs	HTML
What is the effect of REF CLK jitter on the DDS?	FAQs/RAQs	HTML
What are the proper logic input levels for the DDS parts?	FAQs/RAQs	HTML
What are the advantages and disadvantages of serial and parallel mode?	FAQs/RAQs	HTML
Can I read back data at the same rate that I can write the data to the DDS device?	FAQs/RAQs	HTML
What logic families can interface with our parts?	FAQs/RAQs	HTML
What is the maximum speed I can write to the part?	FAQs/RAQs	HTML
I would like to update the FTW of my DDS, but only a single byte of the FTW needs to change. Can the frequency tuning word of a DDS be partially updated a byte at a time?	FAQs/RAQs	HTML
What layout recommendations do you have for the power supply pins of the DDS device?	FAQs/RAQs	HTML
What is the effect of increasing my supply voltage beyond the nominal recommended value?	FAQs/RAQs	HTML
I have limited power to supply to the part. What can I do to reduce the power consumption of the device and thus ensure that my supply is adequate?	FAQs/RAQs	HTML
Do you recommend a linear or switching power supply?	FAQs/RAQs	HTML
Should I separate digital and analog ground planes on my evaluation board?	FAQs/RAQs	HTML
Can I use the same power supply for AVDD and DVDD?	FAQs/RAQs	HTML
What is the ratio between the analog and digital currents drawn by the DDS devices?	FAQs/RAQs	HTML
I'm not using all the blocks of the AD9858. What do I do with the unused inputs of these sections?	FAQs/RAQs	HTML
What causes a Quadrature Digital Upconverter (AD9856, AD9857) to go into a CIC overflow condition?	FAQs/RAQs	HTML
How do I use a DDS for a clock driver?	FAQs/RAQs	HTML
How do I perform amplitude modulation on the output?	FAQs/RAQs	HTML
How can I control the envelope of the output?	FAQs/RAQs	HTML
How do I change the phase of my output signal?	FAQs/RAQs	HTML
Are frequency changes of a DDS phase coherent?	FAQs/RAQs	HTML
Does Analog Devices offer a list of manufacturers of oscillators for DDS devices?	FAQs/RAQs	HTML
Where can I find some good background material on direct digital synthesis?	FAQs/RAQs	HTML
RAQs index	Rarely Asked Questions	HTML
Glossary of EE Terms	Glossary	HTML

Design Tools,Models,Drivers & Software

Title	Content Type	File Type
AD9857 IBIS Models AD9857 (All Speed Grades, All Models)	IBIS Models	HTML

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Model	Package	Pins	Temp. Range	Packing, Qty	Price*(100-499)	Price*1000 pcs	RoHS	View PCN/ PDN	Check Inventory/ Purchase/Sample
AD9857ASTZ Status: Production	80 ld LQFP (14x14mm)	80		Tray, 90	$21.48	$17.31	Y Material Info	PCN	Purchase

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD9857 Evaluation Board

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Model	Description	Price	RoHS	View PCN/ PDN	Check Inventory/ Purchase/Sample
AD9857/PCBZ Status: Production	Evaluation Board	$400.00	Yes	-

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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AD9857: CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter