AD5930

PRODUCTION

Programmable Frequency Sweep and Output Burst Waveform Generator

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Overview

  • Programmable frequency profile
    • No external components necessary
  • Output frequency up to 25 MHz
  • Burst and listen capability
  • Preprogrammable frequency profile minimizes number of DSP/microcontroller writes
  • Sinusoidal/triangular/square wave outputs
  • Automatic or single pin control of frequency stepping
  • Waveform starts at known phase
    • Increments at 0° phase or phase continuously
  • Power-down mode: 20 μA
  • Power supply: 2.3 V to 5.5 V
  • Automotive temperature range: −40°C to +125°C
  • 20-lead pb-free TSSOP

The AD5930 is a waveform generator with programmable frequency sweep and output burst capability. Utilizing embedded digital processing that allows enhanced frequency control, the device generates synthesized analog or digital frequency-stepped waveforms. Because frequency profiles are preprogrammed, continuous write cycles are eliminated and thereby free up valuable DSP/microcontroller resources. Waveforms start from a known phase and are incremented phase continuously, which allows phase shifts to be easily determined. Consuming only 8 mA, the AD5930 provides a convenient low power solution to waveform generation.

The AD5930 can be operated in a variety of modes. In continuous output mode, the device outputs the required frequency for a defined length of time and then steps to the next frequency. The length of time the device outputs a particular frequency is either preprogrammed and the device increments the frequency automatically, or, alternatively, is incremented externally via the CTRL pin. In burst mode, the device outputs its frequency for a length of time and then returns to midscale for a further predefined length of time before stepping to the next frequency. When the MSBOUT pin is enabled, a digital output is generated.

To program the device, the user enters the start frequency, the increment step size, the number of increments to be made, and the time interval that the part outputs each frequency. The frequency sweep profile is initiated, started, and executed by toggling the CTRL pin.

A number of different sweep profiles are offered. Frequencies can be stepped in triangular-sweep mode, which continuously sweeps up and down through the frequency range. Alternatively, in saw-sweep mode, the frequency is swept up through the frequency range, but returns to the initial frequency before executing the sweep again. In addition, a single frequency or burst can be generated without any sweep.

The AD5930 is written to via a 3-wire serial interface, which operates at clock rates up to 40 MHz. The device operates with a power supply from 2.3 V to 5.5 V. Note that AVDD and DVDD are independent of each other and can be operated from different voltages. The AD5930 also has a standby function, which allows sections of the device that are not being used to be powered down.

The AD5930 is available in a 20-lead pb-free TSSOP package.

Applications

  • Frequency sweeping/radar
  • Network/impedance measurements
  • Incremental frequency stimulus
  • Sensory applications
    • Proximity and motion
  • BFSK
  • Frequency bursting/pulse trains

AD5930

Programmable Frequency Sweep and Output Burst Waveform Generator

AD5930 Functional Block Diagram AD5930 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Application Note 22

Technical Articles 21

Product Highlight 1

Frequently Asked Question 1

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Software Resources

Evaluation Software 1

AD5930 Evaluation Software

 


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.

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Evaluation Kits

eval board
EVAL-AD5930

AD5930 Evaluation Board

Features and Benefits

  • Full-featured evaluation board for the AD5930
  • USB cable for PC connection
  • Can be powered entirely from USB port
  • Various linking options
  • PC software for control of the AD5930
  • On-board patchwork area

Product Details

This user guide describes the evaluation board for the AD5930 programmable single-scan waveform generator with programmable frequency sweep and output burst capabilities. The EVAL-AD5930EBZ interfaces to the USB port of a PC. It is possible to power the entire EVAL-AD5930EBZ off the USB port. Software for the EVAL-AD5930EBZ is downloadable from the EVAL-AD5930EBZ product page, which allows users to easily program the AD5930.

The EVAL-AD5930EBZ includes a 50 MHz oscillator that provides the MCLK for the AD5930. The user can remove this oscillator, if required, and drive the AD5930 with a different clock oscillator or an external clock source via a subminiature BNC connector.

EVAL-AD5930
AD5930 Evaluation Board
EVAL-AD5930EBZANGLE-web EVAL-AD5930EBZBOTTOM-web EVAL-AD5930EBZTOP-web

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