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Low power ADC 10MS/s 12b

This silicon-proven IP design describes a general purpose Analog to Digital Converter (ADC) for low-power applications. The converter is a charge-redistribution successive-approximation type converter.

The key feature of this ADC is its low power consumption. This is achieved by using an energy-efficient comparator and by making all circuitry dynamic. As a result, quiescent current is avoided and the power consumption is fully proportional to the sample-rate. This property makes the ADC ideal for low duty-cycle sensor applications and other applications benefiting from low power consumption.

The converter can operate in both single-ended and differential mode, making it suitable for a broad range of applications.

The functional block diagram of the 10MS/s ADC is shown below.

Features

  • Sample-rate up to 10 MS/s
  • Low power consumption, proportional to sample-rate: 740 µW @ 10 MS/s, 7.4 µW @ 100 kS/s
  • Single-ended and differential mode
  • 10.5 ENOB
  • >80 dB SFDR (including THD)
  • 0.15 mm2 in baseline 0.18 μm CMOS
  • Rail-to-rail input range
  • Silicon proven

Applications

  • Low power applications
  • Sensor applications
  • Radio baseband processing

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