Analogue-to-digital converter with low noise

[Lily123]

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.