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AD9838:  11 mW Power, 2.3 V to 5.5 V, Complete DDS

Product Details

Product Status:Recommended for New Designs

The AD9838 is a low power DDS device capable of producing high performance sine and triangular outputs. It also has an on-board comparator that allows a square wave to be produced for clock generation. Consuming only 11 mW of power at 2.3 V the AD9838 is an ideal candidate for power-sensitive applications.

Capability for phase modulation and frequency modulation is provided. The frequency registers are 28 bits; with a 16 MHz clock rate, resolution of 0.06 Hz can be achieved; with a 5 MHz clock rate, the AD9838 can be tuned to 0.02 Hz resolution. Frequency and phase modulation are configured by loading registers through the serial interface and toggling the registers using software or the FSELECT pin and PSELECT pin, respectively.

The AD9838 is written to via a 3-wire serial interface. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards.

The device operates with a power supply from 2.3 V to 5.5 V. The analog and digital sections are independent and can be run from different power supplies; for example, AVDD can equal 5 V with DVDD equal to 3 V.

The AD9838 has a power-down pin (SLEEP) that allows external control of the power-down mode. Sections of the device that are not being used can be powered down to minimize current consumption. For example, the DAC can be powered down when a clock output is being generated.

The AD9838 is available in a 20-lead LFCSP_WQ package.


  • Frequency stimulus/waveform generation
  • Frequency phase tuning and modulation
  • Low power RF/communications systems
  • Liquid and gas flow measurement
  • Sensory applications: proximity, motion, and defect detection
  • Test and medical equipment


  • 2.3 V to 5.5 V power supply
  • MCLK speed: 16 MHz (B grade), 5 MHz (A grade)
  • Output frequency up to 8 MHz
  • Sinusoidal and Triangular Outputs
  • On-board comparator
  • 3-wire SPI interface
  • Extended temperature range: −40°C to +125°C
  • Power-down option
  • 11 mW power consumption at 2.3 V
  • 20-lead LFCSP

Functional Block Diagram for AD9838

Additional Evaluation Board Information

If you purchase the evaluation board model of this product, you will also need the System Demonstration Platform (SDP). They are used in conjunction as part of a customer evaluation environment.


Title Content Type File Type
AD9838: 11 mW Power, 2.3 V to 5.5 V, Complete DDS Data Sheet (Rev A, 04/2011) (pdf, 707 kB) Data Sheets PDF
AN-1248: SPI Interface  (pdf, 155 kB) Application Notes PDF
AN-1044: Programming the AD5932 for Frequency Sweep and Single Frequency Outputs  (pdf, 94 kB) Application Notes PDF
AN-1070: Programming the AD9833/AD9834  (pdf, 127 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
UG-268: Evaluating the AD9838 11 mW Power, 2.3 V to 5.5 V, 16 MHz Complete DDS  (pdf, 682 kB) User Guides PDF
Peak High-speed Performance even at low power. It's why more engineers choose ADI Data Converters. Solutions Bulletins HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD9838 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD9838ACPZ-RL Status: Production 20 ld LFCSP 4x4mm (2.5EP 20 Ind Reel, 5000 - $2.10 Y  Material Info PCN Purchase
AD9838BCPZ-RL Status: Production 20 ld LFCSP 4x4mm (2.5EP 20 Ind Reel, 5000 - $2.28 Y  Material Info PCN Purchase
AD9838BCPZ-RL7 Status: Production 20 ld LFCSP 4x4mm (2.5EP 20 Ind Reel, 1500 - $2.28 Y  Material Info PCN Purchase Sample
Price Table Help

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.

AD9838 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-AD9838SDZ Status: Production Evaluation Board $59.00 Yes -
EVAL-SDP-CB1Z Status: Production Evaluation Controller Board $99.00 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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