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High Accuracy, low-noise sigma delta DAC
The AXIOM_PULLFIRDAC is a high accuracy sigmadelta digital-to-analog converter. The low out-of-bandnoise (OOBN) down to -60dBFS makes the converter ideally suited for application with strict OOBN requirements. The PWM modulator is a special type of 1-bit sigma-delta modulator that produces a pulse width modulated (PWM) signal with a fixed repetition frequency. A fixed repetition rate makes the output signal insensitive to non-linear inter symbol interference (ISI).
The semi-digital FIR filter topology of the FIRDAC makes the FIRDAC behave as a multi-bit DAC. This gives the converter its excellent OOBN and makes the system robust against clock jitter and other error sources typically associated with 1-bit converters while maintaining excellent THD and good matching properties.
The AXIOM_PULLFIRDAC is ideally suited for digitalto- analog conversion in front of (analog) class-D or class-AB amplifiers. In addition this IP is delivered together with up-sampling / interpolation filters as signal pre-processing. The design and layout of the FIRDAC is a highly automated process, easy to scale and good portable to several CMOS technologies.
The semi-digital FIR filter topology of the FIRDAC makes the FIRDAC behave as a multi-bit DAC. This gives the converter its excellent OOBN and makes the system robust against clock jitter and other error sources typically associated with 1-bit converters while maintaining excellent THD and good matching properties.
The AXIOM_PULLFIRDAC is ideally suited for digitalto- analog conversion in front of (analog) class-D or class-AB amplifiers. In addition this IP is delivered together with up-sampling / interpolation filters as signal pre-processing. The design and layout of the FIRDAC is a highly automated process, easy to scale and good portable to several CMOS technologies.
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Block Diagram of the High Accuracy, low-noise sigma delta DAC
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