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Analogue-to-digital converter with low noise

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The industry’s best noise performance and lowest power octal-channel, 14-bit analogue-to-digital converter (ADC) at 80 MSPS has been released.

The ADS5294EVM delivers a signal-to-noise ratio (SNR) of 755dBFS at 5MHz. It integrates a digital processing block, a low-frequency noise suppression mode, and programmable input-to-output mapping.

These features allow system designers to integrate more functions into a smaller footprint, resulting in more compact medical imaging systems.

Features and benefits

  • Leading noise and power performance: The ADS5294EVM provides best-in-class SNR and enables designers of high-density applications to increase channel count without increasing power.
    • 75.5 dBFS SNR at 5 MHz/80 MSPS
    • 78.2 dBFS SNR at 5 MHz and decimation filter enabled
    • 84 dBc SFDR at 5 MHz/80 MSPS
    • 77 mW per channel at 80 MSPS (two LVDS wires per channel)
    • Low-frequency noise suppression mode.
  • Digital processing block that integrates several commonly used system functions such as two- or four-channel averaging and decimation by two, four or eight filters.
  • The digital processing block can be used to significantly improve SNR and filter harmonics, while reducing output data rate for narrow-band applications.
  • Two-wire LVDS interface: Using the ADS5294, digital data can be output over one or two wires of LVDS pins per channel reducing the number of interface lines. This creates a two-wire interface which keeps the serial data rate low allowing designers to use low cost FPGAs.
  • In addition to medical imaging systems, the ADS5294 brings the same benefits to radar, communications, test and measurement and other multi-channel data acquisition applications.

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