AD9954

PRODUCTION

400 MSPS, 14-Bit, 1.8 V CMOS, Direct Digital Synthesizer

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Overview

  • 400 MSPS internal clock speed 
  • Integrated 14-bit DAC
  • Programmable phase/amplitude dithering
  • 32-bit frequency tuning accuracy 14-bit phase tuning accuracy 
  • Phase noise better than –120 dBc/Hz
  • Excellent dynamic performance
    • >80 dB narrowband SFDR 
  • Serial input/output (I/O) control
  • Ultrahigh speed analog comparator
  • Automatic linear and nonlinear frequency sweeping 
  • 4 frequency/phase offset profiles 
  • 1.8 V power supply
  • Software and hardware controlled power-down 
  • 48-lead TQFP Integrated 1024 word × 32-bit RAM 
  • PLL-based REFCLK multiplier 
  • Internal oscillator, can be driven by a single crystal
  • Phase modulation capability 
  • Multichip synchronization

The AD9954 is a direct digital synthesizer (DDS) that uses advanced technology, coupled with an internal high speed, high performance DAC to form a complete, digitally programmable, high frequency synthesizer capable of generating a frequency-agile analog output sinusoidal waveform at up to 160 MHz. The AD9954 enables fast frequency hopping coupled with fine tuning of both frequency (0.01 Hz or better) and phase (0.022° granularity).

The AD9954 is programmed via a high speed serial I/O port. The device includes static RAM to support flexible frequency sweep capability in several modes, plus a user-defined linear sweep mode of operation. Also included is an on-chip high speed comparator for applications requiring a square wave output. An on-chip oscillator and PLL circuitry provide users with multiple approaches to generate the device’s system clock.

The AD9954 is specified to operate over the extended industrial temperature range.

Applications

  • Agile LO frequency synthesis
  • Programmable clock generators
  • FM chirp source for radar and scanning systems
  • Automotive radars
  • Test and measurement equipment
  • Acousto-optic device drivers

AD9954
400 MSPS, 14-Bit, 1.8 V CMOS, Direct Digital Synthesizer
AD9954 Functional Block Diagram AD9954 Pin Configuration
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Documentation

Data Sheet 1

Application Note 20

Technical Articles 21

Product Highlight 1

Frequently Asked Question 1

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Software Resources

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Tools & Simulations

ADIsimDDS (Direct Digital Synthesis)

ADIsimDDS uses mathematical equations to model and illustrate the overall performance of the selected device. ADIsimDDS calculates the required FTW, given the reference clock frequency and desired output frequency. This tool also models an estimate of the overall spectral performance, and allows the user to explore the effects of external reconstruction filters.

Open Tool

AD9954 IBIS Models 1

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Evaluation Kits

EVAL-AD9954

AD9954 Evaluation Board

Product Details

This page contains evaluation board documentation and ordering information for evaluating the AD9954.


Please be aware that this product requires access to a computer with a parallel printer cable port.

EVAL-AD9954
AD9954 Evaluation Board

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