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DDS Configuration

Sampling Rate:100.00 MHz

Output Frequency:25.00 MHz

Nyquist Zone:1

DAC Resolution:12 bits

Phase Accumulator:32 bits

Frequency Resolution:0.02 Hz

Harmonics Analyzed:15

Performance Metrics

SFDR:60.0 dB

SNR:60.0 dB

ENOB:10.00 bits

Theoretical Limits

Ideal SNR:74.0 dB

Phase Truncation Limit:-195.6 dBc

Max Frequency:50.00 MHz

Reconstruction Filter

Filter Type:Zero Order Hold

Sinc Response

Attenuation @ fo:-0.9 dB

Attenuation @ fs/2:-3.92 dB

Error Sources

Amplitude QuantizationEnabled

Phase TruncationEnabled

Clock FeedthroughDisabled

DAC NonlinearitiesDisabled

Phase NoiseDisabled

Active Error Contributions

Quantization SNR:74.0 dB

Phase Noise Floor:-195.6 dBc

DDS Theory & Help

Overview

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Direct Digital Synthesis (DDS) is a technique used to generate analog waveforms by synthesizing them digitally. It consists of three main components: a phase accumulator, a phase-to-amplitude converter (lookup table), and a digital-to-analog converter (DAC).

Key features of DDS include:

Precise frequency control and resolution
Fast switching between frequencies
Phase-continuous frequency changes
Digital control of frequency, phase, and amplitude
Wide frequency range (DC to Nyquist frequency)

DDS Theory

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Spurious Sources

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Nyquist Zones & Aliasing

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Reconstruction Filtering

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Optimization Tips

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