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Improve accuracy with MS FPGA calibration

Posted: 18 Mar 2009     Print Version  Bookmark and Share

Keywords:analogue-to-digital converters  mixed-signal FPGA  calibration 

Today's intelligent system management designs in typical telecommunications or industrial control applications need to constantly monitor several voltage rails and take appropriate action when a certain condition exists. If a high-end telecommunications system must be shut down, for example, it is important that accuracy be high and the output measurements are carefully calibrated to eliminate errors that can occur in the measurement process. For this reason, these applications need accuracy levels better than 1 per cent. However, the total system accuracy offered by most analogue-to-digital converters (ADC) signal chains may not sufficient.

Multiple discrete components, such as a pre-scaler or a divider network, have traditionally been used for calibration, to achieve the stringent accuracy and precision levels required by intelligent system management and industrial control applications. An alternate scenario is the use of a feature-rich, mixed-signal FPGA capable of supporting a calibration scheme, both in software and without the use of external components, to enable easier design implementation, improve accuracy, lower overall power consumption and increase signal integrity.

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