AD5932It is a programmable frequency sweepWaveform generator。 The device uses embedded digital processing with enhanced frequency control to generate synthesized analog or digital frequency step waveforms. Using pre-programmed frequency profiles avoids continuous write cycles, freeing up important DSP/microcontroller resources. The waveform starts with a known phase and can be increased continuously, so the phase shift can be easily determined.
When programming the device, the user enters the start frequency, frequency stepping, number of increments, and the time interval at which the device will stay at each frequency point. The frequency profile can be initiated by switching the CTRL pin.
The device offers a variety of scanning methods. The user can select the output final frequency in a continuous sweep or choose to return to an intermediate frequency.
The AD5932 writes data through a 3-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 unused parts of the device.
The AD5932 is available in a 16-lead 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)