STMicroelectronics has created isolated second-order sigma-delta modulators for industrial applications. They convert an analogue input signal up to ±320mV full-scale into a 1bit digital data stream at up to 25Msample/s. Resolution is 16bit (ENOB typically 13bit) and signal-to-noise ratio is 86dB. “The embedded galvanic-isolation technology of these devices eliminates the degradation associated with converters, as well ...

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