AD9956:  400 MSPS 14-Bit DAC 48-Bit FTW 1.8 V CMOS DDS Based AgileRF™ Synthesizer

The AD9956 is Analog Devices’s first AgileRF synthesizer. The device is comprised of a DDS and PLL circuitry. The DDS features a 14-bit DAC operating up to 400 MSPS and a 48-bit frequency ...More

Two evaluation boards are available for the AD9956:

  • AD9956-VCO/PCB: Evaluation board with 2.4 GHz VCO and charge pump filter
  • AD9956/PCB: Evaluation Board with no VCO and unpopulated loop filter

    • AD9956:  400 MSPS 14-Bit DAC 48-Bit FTW 1.8 V CMOS DDS Based AgileRF™ Synthesizer

    Product Description

    The AD9956 is Analog Devices’s first AgileRF synthesizer. The device is comprised of a DDS and PLL circuitry. The DDS features a 14-bit DAC operating up to 400 MSPS and a 48-bit frequency tuning word. The PLL Circuitry includes a phase detector with scaleable 200 MHz inputs (pre-scalar inputs operate up to 650 MHz) and digital control over the charge pump current. The device also includes a 650 MHz PECL driver with programmable slew rates.The AD9956 uses advanced DDS technology, an internal high-speed, high performance D/A converter and an advance phase-detector/charge pump combination to enable the synthesis of digitally-programmable, frequency-agile analog output sinusoidal waveforms up to 2.7 GHz. The AD9956 is designed to provide fast frequency hopping and fine tuning resolution (48-bit frequency tuning word). Information is loaded into the AD9956 via a serial I/O port which has a device write speed of 25 MBit/sec. The AD9956 DDS block also supports a user defined linear sweep mode of operation.

    The AD9956 is specified to operate over the extended automotive range of −40°C to +125°C.

    Applications

  • Agile L.O. frequency synthesis
  • FM chirp source for radar and scanning systems
  • Automotive radars
  • Test and measurement equipment
  • Acousto-optic device drivers

    • Features

    • 400 MSPS Internal DDS Clock Speed
    • 48-bit tuning word
    • 14-bit Programmable Phase Offset
    • Integrated 14-bit DAC
      Excellent Dynamic Performance
      - 80 dB SFDR @ 160 MHz (±100 kHz
      Offset IOUT)
      25 MBit/sec-write Speed Serial I/O Control
    • 200 MHz Phase Detector Inputs
    • Programmable (1-16) phase detector 650 MHz pre-scalars (÷M, ÷N)
    • Programmable RF Prescaler (÷R) {R = 2, 4, 8}
    • 8 Phase/frequency Profiles
    • 1.8 V Supply for Device Operation
    • 3.3 V Supply for I/O and Charge Pump Output
    • Software Controlled Power-down
    • 48-lead LFCSP

    Diagrams

    AD9956 Diagram
    Functional Block Diagram for AD9956

    Specifications

    Compliance Range (V) 2.3V
    FS Iout (mA nom) 10mA
    I Supply total (max) n/a
    I/O Interface Serial
    Master fclk 400MHz
    Nominal Supply (V) Multi(+1.8, +3.3)
    On-Board Comparator No
    REFCLK Multiplier No
    Resolution (Bits) 14bit

    AD9913 - Low Power 250 MSPS 10-Bit DAC 1.8 V CMOS Direct Digital Synthesizer

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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