Features and Benefits
- 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.
- Frequency sweeping/radar
- Network/impedance measurements
- Incremental frequency stimulus
- Sensory applications
- Proximity and motion
- Frequency bursting/pulse trains
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
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.
Application Notes (24)
Software & Systems Requirements
Tools & Simulations
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.
Technical Articles (21)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.