Maxim Integrated Products, a manufacturer of high-performance semiconductor products, has introduced a new chipset, the MAXQ3108 and DS8102, that reduces the build of materials cost of a polyphase energy meter.
Together, the MAXQ3108 and DS8102 replace three high-cost current transformers with three low-cost shunts to save both cost and space.
According to the company, the DS8102 contains two high-precision second-order delta-sigma modulators with programmable gains up to 32x. The modulators’ outputs are encoded into a single bit stream to minimize the isolation and data-coupling cost. The data processing is carried out in the MAXQ3108, a dual-core microcontroller that accepts three DS8102 output bit streams, then decodes and decimates that data to produce raw ADC samples across a wide dynamic range.
The ADC samples are fed into the MAXQ3108’s integrated digital signal processor that computes the power, energy, power factors, and RMS voltage and current parameters required for a multifunction electricity meter, said Maxim.
Maxim claims that the MAXQ3108 and DS8102 chipset reduces total system cost and delivers high performance and flexibility for polyphase electricity meters. The MAXQ3108’s DSP is also programmable, making the chipset suitable for a wide variety of industrial data-acquisition applications where isolation between the physical signals and the data-acquisition instrument is required.
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