The AD5932 is a waveform generator that provides programmable frequency sweep. The device uses embedded digital processing technology that supports enhanced frequency control to generate synthetic analog or digital frequency step waveforms. Pre-programmed frequency profiles avoid continuous write cycles, freeing up important DSP/microcontroller resources. The waveform starts from a known phase and can be continuously increased, making it easy to determine the phase shift.
To program a device, the user enters the starting frequency, frequency step, number of increments, and the time interval at which the device stays at each frequency point. The frequency profile can be started by switching the CTRL pin.
The device offers a variety of different scanning methods. The user can select the output final frequency in continuous scanning, or choose to return to the intermediate frequency.
The AD5932 writes data via a three-wire serial interface and is capable of operating at clock rates up to 40 MHz. The device operates from a 2.3 V to 5.5 V supply and has a standby function that shuts down parts of the device that are not in use.
The AD5932 is available in a 16-pin TSSOP package.
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• Frequency scanning
• Network/impedance measurements
• Incremental frequency excitation
• Sensor applications – proximity and motion detection
• BFSK
• Binary Frequency Shift Keying (BFSK)