FW2DDC - Digital Down-conversion Firmware

Stand-alone firmware package for RF applications

  • Overview

    FW2DDC equips ADQ7WB and ADQ7DC with real-time functions commonly used in radio frequency (RF) receivers. It also contains the proprietary ADX technology which corrects mismatch errors in time-interleaved analog-to-digital converters (TI-ADCs) and thereby ensure industry-leading spurious-free dynamic range (SFDR). The digital signal processing also helps reduce the data rate to a manageable level in order to simplify data post-processing and storage.

    FW2DDC Flow
    • ADX corrects TI-ADC offset, gain and phase errors so that unwanted image spurs does not limit achievable SFDR.
    • FW2DDC contains two digital downconverters (DDCs) consisting of quadrature mixers and decimation filters that help reduce the data rate, improve the signal-to-noise (SNR) ratio for the band of interest, and translate the RF frequency to an intermediate frequency (IF) for baseband processing.
    • The subsequent finite impulse response (FIR) filters can be used either for further noise reduction, for channel equalization, or for correcting in-phase and quadrature (IQ) imbalance.
    • Built-in ADX time-interleaving correction
    • DDC
    • DDC instances: 4
    • NCO frequency resolution: 1.1642 Hz
    • NCO spur level: -95 dBFS
    • Decimation factor: 2 to 234
    • FIR filter / Equalizer
    • Filter instances: 4
    • Filter length: 5 taps
    • Coefficient length: 14 bits
    • Data input length: Up to 25 bits
    • RF monitoring and recording
    • Channel sounding
    • Satellite monitoring
    • RADAR
    • 5G
    • RF production testing
    • Signals intelligence
    • Low-level RF (LLRF)

  • FW2DDC Block Diagram
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    • Dual channel
    • 5 GSPS sampling rate
    • 6.5 GHz input bandwidth
    • AC-coupled

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    • Single/dual channel
    • Up to 10 GSPS sampling rate
    • Up to 3 GHz input bandwidth
    • DC-coupled

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