Smart Grid Solutions Guide - Maxim

Power-grid monitoringFeatured productsADC’s high-impedance input eliminates external components and reduces system costMAX11046BenefitsThe MAX11046 is the industry’s first true 16-bit, 8-channel simultaneoussamplingSAR ADC. The device’s proprietary architecture provides anultra-low-noise, on-chip, negative supply voltage. This innovativetechnology achieves true 16-bit performance from a high-impedancebipolar input using only a single positive external supply. Performanceexceeds the regulatory requirements for Class 0.2 precision (0.2% of220V) mandated by IEC 62053.The high-impedance input allows a lowpass filter prior to the ADCinputs, thus eliminating the need for precision external buffers. Thebipolar input eliminates a level shifter. Simultaneous sampling easesthe typical requirement for phase-adjust firmware and thus speedsend designs and time to market. Together, these benefits simplifythe design challenges for power-grid monitoring and measurementequipment. This ADC performance is unprecedented, and designswill save cost, area, and power.••Saves up to $1/channel*––High-impedance input eliminatesexternal buffers for precision designs––Bipolar input eliminates a level shifter––5V single-supply operation––Integrated 20mA surge protection••Provides the highest precision––Industry-leading SNR and THD––True 16-bit performance exceeds theEN 50160 and IEC 62053 requirementsfor Class 0.2 power-grid equipment••Simplifies design and shortens time tomarket––Simultaneous sampling simplifies phaseadjustfirmware requirementsMAX11046CH0CH7CLAMPCLAMPT/HT/H16-BIT ADC16-BIT ADCDATA REGISTERSBIDIRECTIONAL DRIVERSDB15DB4DB3DB0CONFIGURATIONREGISTERSINTERFACEANDCONTROLWRRDCSCONVSTEOCBlock diagram of the MAX11046 16-bit, 8-channel, simultaneoussamplingADC. Eight inputs measure voltage and current signals onthree phases plus neutral.*Cost savings achieved by eliminating external amplifiers and level-shifting circuitry.16 Maxim Smart Grid Solutions