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AD9851: CMOS 180 MHz DDS/DAC Synthesizer Data Sheet (Rev. D)12/7/1998PDF742 kB
Overview
Features and Benefits
- 180 MHz Clock Rate with Selectable 6x Reference Clock Multiplier
- On-Chip High Performance 10-Bit DAC and High Speed Comparator with Hysteresis
- SFDR >43 dB @ 70 MHz AOUT
- 32-Bit Frequency Tuning Word
- 5-Bit Phase Modulation and Offset Capability
- Simplified Control Interface: Parallel or Serial Asynchronous Loading Format
- Comparator Jitter <80 ps p-p @ 20 MHz
- 2.7 V to 5.25 V Single-Supply Operation
- Low Power: 555 mW @ 180 MHz
- Power-Down Function, 4 mW @ 2.7V
- Ultrasmall 28-Lead SSOP Packaging
Product Details
The AD9851 is a highly integrated device that uses advanced DDS technology, coupled with an internal high-speed, high performance D/A converter, and comparator, to form a digitally-programmable frequency synthesizer and clock generator function. When referenced to an accurate clock source, the AD9851 generates a stable frequency and phase-programmable digitized analog output sinewave. This sinewave can be used directly as a frequency source, or internally converted to a square wave for agile-clock generator applications.
The AD9851's innovative high-speed DDS core provides a 32-bit frequency tuning word, which results in an output tuning resolution of 40 milli-Hertz, for a 180 MHz reference clock. The AD9851 contains a unique X6 reference clock multiplier circuit that obviates the need for a high-speed reference oscillator. The 6X PLL multiplier has minimal impact on SFDR and phase noise characteristics. The device provides 5-bits of digitally-controlled phase modulation which enables phase shifting of its output in increments of 180°, 90°, 45°, 22.5°, 11.25°, and any combination thereof.
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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AN-1389: Recommended Rework Procedure for the Lead Frame Chip Scale Package (LFCSP) (Rev. 0)1/25/2016PDF133K
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AN-769: Generating Multiple Clock Outputs from the AD9540 (Rev. 0)2/14/2015PDF0
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AN-939: Super-Nyquist Operation of the AD9912 Yields a High RF Output Signal (Rev. 0)2/14/2015PDF221 kB
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AN-837: DDS-Based Clock Jitter Performance vs. DAC Reconstruction Filter Performance (Rev. 0)2/14/2015PDF313 kB
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AN-557: An Experimenter's Project: (Rev. 0)2/14/2015PDF368 kB
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AN-419: A Discrete, Low Phase Noise, 125 MHz Crystal Oscillator for the AD98502/14/2015PDF101 kB
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AN-237: Choosing DACs for Direct Digital Synthesis2/14/2015PDF1156 kB
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AN-423: Amplitude Modulation of the AD9850 Direct Digital Synthesizer2/14/2015PDF37 kB
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AN-345: Grounding for Low-and-High-Frequency Circuits2/14/2015PDF455 kB
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AN-342: Analog Signal-Handling for High Speed and Accuracy2/14/2015PDF468 kB
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AN-823: Direct Digital Synthesizers in Clocking Applications Time (Rev. 0)2/14/2015PDF115 kB
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AN-280: Mixed Signal Circuit Technologies2/14/2015PDF2101 kB
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AN-605: Synchronizing Multiple AD9852 DDS-Based Synthesizers (Rev. 0)2/14/2015PDF527 kB
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AN-927: Determining if a Spur is Related to the DDS/DAC or to Some Other Source (For Example, Switching Supplies) (Rev. 0)2/14/2015PDF170 kB
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AN-587: Synchronizing Multiple AD9850/AD9851 DDS-Based Synthesizers (Rev. 0)2/14/2015PDF116 kB
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AN-953: Direct Digital Synthesis (DDS) with a Programmable Modulus (Rev. B)3/27/2008PDF112 kB
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AN-843: Measuring a Loudspeaker Impedance Profile Using the AD5933 (Rev. A)6/27/2007PDF284 kB
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AN-851: A WiMax Double Downconversion IF Sampling Receiver Design (Rev. 0)7/26/2006PDF262 kB
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AN-847: Measuring a Grounded Impedance Profile Using the AD5933 (Rev. A)6/20/2006PDF294 kB
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AN-772: A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP)2/1/2006
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AN-632: Provisionary Data Rates Using the AD9951 DDS as an Agile Reference Clock for the ADN2812 Continuous-Rate CDR (Rev. 0)9/25/2003PDF138 kB
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AN-543: High Quality, All-Digital RF Frequency Modulation Generation with the ADSP-2181 and the AD9850 DDS9/12/2002PDF49 K
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• AN-543 - Monaural FM Transmitter
DSP -
• AN-543 - Stereo FM Transmitter
DSP
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FAQs7/26/2017
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Video Portables and Cameras Get HDMI Outputs4/13/2007
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Improved DDS Devices Enable Advanced Comm Systems9/1/2006
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ADI Buys Korean Mobile TV Chip Maker6/7/2006
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The Year of the Waveform Generator12/1/2005
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DDS Applications9/26/2005
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Synchronized Synthesizers Aid Multichannel Systems9/20/2005
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DDS IC Initiates Synchronized Signals7/20/2005
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Digital Waveform Generator Provides Flexible Frequency Tuning for Sensor Measurement12/7/2004
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DDS Simplifies Polar Modulation8/5/2004
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DDS Design5/13/2004
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Integrated DDS Chip Takes Steps To 2.7 GHz4/28/2004
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Speedy A/Ds Demand Stable Clocks3/22/2004
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DDS IC Plus Frequency-To-Voltage Converter Make Low-Cost DAC2/5/2004
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Simple Circuit Controls Stepper Motors1/8/2004
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Two DDS ICs Implement Amplitude-shift Keying12/25/2003
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DDS Circuit Generates Precise PWM Waveforms10/2/2003
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DDS Device Produces Sawtooth Waveform7/10/2003
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400-MSample DDSs Run On Only +1.8 VDC12/1/2002
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Digital Potentiometers Vary Amplitude In DDS Devices5/29/2000
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DDS Device Provides Amplitude Modulation9/2/1999
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Basics of Designing a Digital Radio Receiver (Radio 101)3/6/1998
Tools & Simulations
Design Tools
ADIsimDDS (Direct Digital Synthesis)
ADIsimDDS uses mathematical equations to model and illustrate the overall performance of the selected device. ADIsimDDS calculates the required FTW, given the reference clock frequency and desired output frequency. This tool also models an estimate of the overall spectral performance, and allows the user to explore the effects of external reconstruction filters.
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD9851BRS | Material Declaration | Reliability Data | 28-Lead SSOP | |
| AD9851BRSZ | Material Declaration | Reliability Data | 28-Lead SSOP | |
| AD9851BRSZRL | Material Declaration | Reliability Data | 28-Lead SSOP | |
| Wafer Fabrication Data |
PCN-PDN Information
Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.
Support & Discussions
AD9851 Discussions
RE: AD9850 - SPI Interface and IIO Driver for Xilinx Zynq-7020
8 week(s) ago in Direct Digital Synthesis (DDS)
Sample & Buy
Ordering FAQs
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List Pricing
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Lead Times
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Sampling
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