AD9956 データシートの表示（PDF） - Analog Devices

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AD9956

2.7 GHz DDS-Based AgileRF™ Synthesizer

Analog Devices 

PRODUCT OVERVIEW

The AD9956 is Analog Devices’ newest AgileRF synthesizer.

The device is comprised of DDS and PLL circuitry. The DDS

features a 14-bit DAC operating at up to 400 MSPS and a 48-bit

frequency tuning word (FTW). The PLL circuitry includes a

phase frequency detector with scaleable 200 MHz inputs

(divider inputs operate up to 655 MHz) and digital control over

the charge pump current. The device also includes a 655 MHz

CML-mode PECL-compliant driver with programmable slew

rates. The AD9956 uses advanced DDS technology, an internal

high speed, high performance DAC, and an advanced phase

frequency detector/charge pump combination, which, when

used with an external VCO, enables the synthesis of digitally

programmable, frequency-agile analog output sinusoidal wave-

forms 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 that has a device write-speed of 25 Mb/s. 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.

AD9956

Rev. B | Page 3 of 32

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