Simultaneous-sampling ADC Provides "True" 16-bit Performance for Polyphase Power-grid Designs

(Product News, 23 Dec 2009)

Maxim Integrated Products' MAX11046 8-channel, 16-bit simultaneous-sampling ADC features a unique architecture (patent pending) that provides an ultra-low-noise, on-chip, negative supply voltage. This innovation achieves true 16-bit performance from a high-impedance bipolar input using only a single positive external supply, and exceeds the regulatory requirements for Class 0.2 (0.2 percent of 220V) precision mandated by IEC 62053. The high impedance input eliminates precision external buffers on each channel, while the bipolar input saves a level shifter.

Furthermore, simultaneous sampling eases the typical requirement for phase-adjust firmware and thus speeds end designs and time to market. Together these benefits simplify the design challenges for power-grid monitoring and measurement equipment while also providing unprecedented performance, and saving cost, area and power.

The MAX11046 is the industry's only 16-bit simultaneous-sampling SAR ADC that exceeds the combined industry standards of the IEC 62053 Class 0.2 and meets the 6kV transient voltage specification of EN 50160.

The MAX11046 waives the need for an external negative voltage supply. It eliminates an active input buffer for each channel, and saves up to $1 (U.S.) per channel. These cost savings are significant in applications that require multichannel simultaneous sampling like power-grid power-factor optimization for greater energy efficiency. At 8mm² per channel, the MAX11046 provides the industry's lowest area per channel, bettering the nearest competition by 67 percent per channel.



This new Maxim ADC also offers the flexibility to operate the digital I/O from 2.7V to 5.25V. This eliminates the need for a level shifter, lowers the number of bypass capacitors, simplifies the design and, again, reduces cost.

Maxim's MAX11046 ADC

Maxim


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