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AD9850:  CMOS, 125 MHz Complete DDS Synthesizer

The AD9850 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 complete digitally programmable frequency synthesizer and clock generator function. When referenced to an accurate clock source, the AD9850 generates a spectrally pure, frequency/ phase-programmable, analog output sine wave. This ...More

AD9850:  CMOS, 125 MHz Complete DDS Synthesizer

Product Description

The AD9850 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 complete digitally programmable frequency synthesizer and clock generator function. When referenced to an accurate clock source, the AD9850 generates a spectrally pure, frequency/ phase-programmable, analog output sine wave. This sine wave can be used directly as a frequency source or converted to a square wave for agile-clock generator applications. The AD9850’s innovative high speed DDS core provides a 32-bit frequency tuning word, which results in an output tuning resolution of 0.0291 Hz, for a 125 MHz reference clock input. The AD9850’s circuit architecture allows the generation of output frequencies of up to one-half the reference clock frequency (or 62.5 MHz), and the output frequency can be digitally changed (asynchronously) at a rate of up to 23 million new frequencies per second. The device also provides five 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. The AD9850 also contains a high speed comparator that can be configured to accept the (externally) filtered output of the DAC to generate a low jitter square wave output. This facilitates the device’s use as an agile clock generator function.

The frequency tuning, control, and phase modulation words are loaded into the AD9850 via a parallel byte or serial loading format. The parallel load format consists of five iterative loads of an 8-bit control word (byte). The first byte controls phase modulation, power-down enable, and loading format; bytes 2–5 comprise the 32-bit frequency tuning word. Serial loading is accomplished via a 40-bit serial data stream on a single pin. The AD9850 Complete-DDS uses advanced CMOS technology to provide this breakthrough level of functionality and performance on just 155 mW of power dissipation (+3.3 V supply).

The AD9850 is available in a space saving 28-lead SSOP, surface mount package. It is specified to operate over the extended industrial temperature range of –40°C to +85°C

RESOURCES & TOOLS

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  • 125 MHz Clock Rate
  • On-Chip High Performance DAC and High Speed Comparator
  • DAC SFDR > 50 dB @ 40 MHz AOUT
  • 32-Bit Frequency Tuning Word
  • Simplified Control Interface: Parallel Byte or Serial Loading Format
  • Phase Modulation Capability
  • 3.3 V or 5 V Single-Supply Operation
  • Low Power: 380 mW @ 125 MHz (5 V)
    155 mW @ 100 MHz (3.3 V)
  • Power-Down Function
  • Ultrasmall 28-Lead SSOP Packaging
  • Compliance Range (V): 1.5V
  • FS Iout (mA nom): 20mA
  • I Supply total (max): 96mA
  • I/O Interface: Parallel,Serial
  • Master fclk : 125MHz
  • Nominal Supply (V): Single(+3.3),Single(+5)
  • On-Board Comparator: Yes
  • REFCLK Multiplier: No
  • Resolution (Bits): 10bit

Functional Block Diagram for AD9850

AD9850 Diagram
Functional Block Diagram for AD9850

Similar Products

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Part# Master fclk Resolution (Bits) Tuning Word Width (bits) Nominal Supply (V) I Supply total (max) FS Iout (mA nom) Compliance Range (V) REFCLK Multiplier On-Board Comparator I/O Interface Price* (1000-4999) Product Description
AD9913 250MHz 10 32 Single(+1.8) 63.5mA 4.6 0.8 Yes No Parallel, Serial $9.77 Low power 250 MSPS DDS with 10 bit DAC output
AD9833 25MHz 10 28 Single(+2.3 to +5.5), Single(+2.5), Single(+2.7), Single(+3), Single(+3.3), Single(+3.6), Single(+5) 5.5mA 3 0.65 No No Serial $4.00 25 MHz, Serial Input, Programmable DDS Waveform Generator
AD9831 25MHz 10 32 Single(+3.3), Single(+3.6), Single(+5) 15mA 4 1.5 No No Parallel $6.33 CMOS, 25 MHz Parallel Input DDS with On-Chip 10-Bit DAC & Sine Lookup Table
AD9832 25MHz 10 32 Single(+3.3), Single(+3.6), Single(+5) 15mA 4 1.35 No No Serial $5.06 CMOS, 25 MHz Serial Input DDS with On-Chip 10-Bit DAC & Sine Lookup Table
AD5930 50MHz 10 24 Single(+2.3 to +5.5) 8mA 3.1 0.8 No No Serial $6.38 Programmable Frequency Sweep and Output Burst Waveform Generator
AD5932 50MHz 10 24 Single(+2.3 to +5.5) 8mA n/a n/a Yes No Serial $4.15 Programmable Single-Scan Waveform Generator
AD9830 50MHz 10 32 Single(+5) 60mA 20 1 No No Parallel $11.08 CMOS, 50 MHz Parallel Load DDS with On-Chip 10-Bit DAC & Sine Lookup Table
AD9835 50MHz 10 32 Single(+5) 40mA 4 1.35 No No Serial $5.82 CMOS, Serial Input, 50 MHz DDS with On-Chip 10-Bit DAC
AD9834 75MHz 10 28 Single(+2.3 to +5.5), Single(+2.5), Single(+2.7), Single(+3), Single(+3.3), Single(+3.6), Single(+5) 8.7mA 3 0.8 No Yes Serial $5.01 Low Power, 50 MHz Serial Input DDS With On-Board Comparator
AD9850 125MHz 10 32 Single(+3.3), Single(+5) 96mA 20 1.5 No Yes Parallel, Serial $12.14 CMOS, 125 MHz Serial/Byte-Parallel Input, Complete DDS
AD9851 180MHz 10 32 Single(+3), Single(+3.3), Single(+3.6), Single(+5) 130mA 20 1.5 Yes Yes Parallel, Serial $13.56 180 MHz Complete DDS
AD9852 300MHz 12 48 Single(+3.3) 922mA 20 1 Yes Yes Parallel, Serial $15.58 CMOS, 300 MSPS Complete DDS w/ Clock Multiplier
AD9854 300MHz 12 48 Single(+3.3) 1210mA 10 1 Yes Yes Parallel, Serial $17.10 CMOS 300 MHz, Quadrature, Complete-DDS
AD9859 400MHz 10 32 Multi(+1.8, +3.3) n/a 20 2.05 Yes No Serial $9.87 400 MSPS, 10-Bit, 1.8 V CMOS DDS
AD9951 400MHz 14 32 Multi(+1.8, +3.3), Single(+1.8) n/a 10 2.05 Yes No Serial $13.90 400 MSPS 14-Bit, 1.8 V CMOS DDS
AD9952 400MHz 14 32 Multi(+1.8, +3.3), Single(+1.8) n/a 10 2.05 Yes Yes Serial $15.68 400 MSPS, 14-Bit, 1.8 V, CMOS Direct Digital Synthesizer w/High Speed Comparator
AD9953 400MHz 14 32 Multi(+1.8, +3.3), Single(+1.8) n/a 10 2.05 Yes No Serial $14.92 400 MSPS, 14-Bit DAC, 1.8 V CMOS Direct Digital Synthesizer w/ 1024x32 RAM
AD9954 400MHz 14 32 Multi(+1.8, +3.3), Single(+1.8) n/a 10 2.05 Yes Yes Serial $17.45 400 MSPS, 14-Bit, 1.8V CMOS DDS w/ 1024x32 RAM, Linear Sweep Block, & Hi Speed Comparator
AD9956 400MHz 14 48 Multi(+1.8, +3.3) n/a 10 2.3 No No Serial $17.45 400 MSPS, 14-Bit DAC, 48-Bit Freq Tuning Word, 1.8 V CMOS DDS Based AgileRF™ Synthesizer
AD9958 500MHz 10 32 Multi(+1.8, +3.3) 105mA 10 2.3 Yes - Serial $20.48 2-Channel 500 MSPS DDS with 10-Bit DACs
AD9911 500MHz 10 32 Single(+1.8) 73mA 10 1.8 Yes - Serial $15.69 500 MSPS Direct Digital Synthesizer w/10-Bit DAC
AD9959 500MHz 10 32 Multi(+1.8, +3.3) 180mA 10 2.3 Yes - Serial $37.59 -
AD9858 1000MHz 10 32 Multi(+3.3, +5) n/a 40 3.8 No No Parallel, Serial $45.66 1 GSPS Direct Digital Synthesizer
AD9910 1000MHz 14 32 Single(+1.8), Single(+3.3) n/a 20 0.5 Yes No Parallel, Serial $35.33 1 GSPS, 14-Bit, 3.3 V CMOS Direct Digital Synthesizer
AD9912 1000MHz 14 48 Multi(+1.8, +3.3) 394mA - 0.5 Yes Yes Serial $37.70 1 GSPS 14-Bit, DDS with Spur Reduction Channels
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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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.