Fully isolated ADC

14 November 2012 Analogue, Mixed Signal, LSI

New from Analog Devices is a fully isolated analog-to-digital converter (ADC) designed for poly-phase energy metering applications. The ADE7913 3-channel, sigma-delta device incorporates AD’s patented iCoupler and isoPower technologies to implement isolated signal transfer and DC-to-DC power conversion across a 5 kV-rated insulation barrier. This enables the use of shunt resistor sensing elements instead of current transformers (CTs), thereby providing immunity to magnetic field interference and tampering. Up to four ADE7913s can be synchronously clocked from a single crystal or an external clock. The IC integrates a temperature sensor, voltage reference and voltage regulator, and SPI serial interface.

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