AD9956-VCO/PCBZ Direct Digital Synthesis (DDS) by Analog Devices

Status: Production
Series: AD9956
RoHS: Compliant
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The AD9956 is Analog Devices’s first AgileRF synthesizer.The device is comprised of a DDS and PLL circuitry. The DDSfeatures a 14-bit DAC operating up to 400 MSPS and a 48-bitfrequency tuning word. The PLL Circuitry includes a phasedetector with scaleable 200 MHz inputs (pre-scalar inputsoperate up to 650 MHz) and digital control over the chargepump current. The device also includes a 650 MHz PECL driverwith programmable slew rates.The AD9956 uses advanced DDStechnology, an internal high-speed, high performance D/Aconverter and an advance phase-detector/charge pumpcombination to enable the synthesis of digitally-programmable,frequency-agile analog output sinusoidal waveforms up to2.7 GHz. The AD9956 is designed to provide fast frequencyhopping and fine tuning resolution (48-bit frequency tuningword). Information is loaded into the AD9956 via a serial I/Oport which has a device write speed of 25 MBit/sec. The AD9956DDS block also supports a user defined linear sweep mode ofoperation.The AD9956 is specified to operate over the extendedautomotive range of −40°C to +125°C.

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Features

400 MSPS Internal DDS Clock Speed
48-bit frequency tuning word
14-bit Programmable Phase Offset
Integrated 14-bit DAC
Excellent Dynamic Performance
Phase noise ≤ 135 dBc/Hz @ 1 KHz offset
−80 dB SFDR @ 160 MHz (±100 KHz offset IOUT)
25 Mb/s write-speed serial I/O control
655 MHz programmable input dividers for the phase
frequency detector (÷M, ÷N) {M, N = 1..16} (bypassable)
Programmable RF divider (÷R) {R = 1, 2, 4, 8} (bypassable)
8 phase/frequency profiles
1.8 V supply for device operation
3.3 V supply for I/O and charge pump
Software controlled power-down
48-lead LFCSP package
Automatic linear frequency sweeping capability (in DDS)
Programmable charge pump current (up to 4 mA)
Phase modulation capability
Multichip synchronization
Dual-mode PLL lock detect
655 MHz CML-mode PECL-compliant driver

Alternative Descriptions

400 Msps 14 Bit DDS EvBd. w/24 | Analog Devices


Frequently Asked Questions

Where can I find additional details, specifications and documents for a AD9956-VCO/PCBZ?

Additional datasheets, footprints and schematics for AD9956-VCO/PCBZ are listed on our Part Details page. You can also find images and similar parts to AD9956-VCO/PCBZ on this page.

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What category does AD9956-VCO/PCBZ fall under?

The AD9956-VCO/PCBZ is listed under Direct Digital Synthesis (DDS).

Can I view similar or alternative parts?

You can view similar parts to AD9956-VCO/PCBZ when available in the Direct Digital Synthesis (DDS) range under the specifications section at the bottom of the details page.

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Is the AD9956-VCO/PCBZ RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

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