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  Brian Pisani

  • over 4 years ago
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  Delta-sigma ADC digital filter types: Wideband filters

  In my last blog post, I talked about sinc filters and their unique relationship with delta-sigma analog-to-digital converters (ADCs). I explained that sinc filters are great for applications with low bandwidth because of their quick settling time and...
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  Christopher Hall

  • over 4 years ago
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  It’s in the math: how to convert an ADC code to a voltage (part 1)

  Many newcomers to analog-to-digital converters (ADCs) wonder how to convert their ADC code to a voltage. Or perhaps their question is specific to the application, such as how to convert the ADC code back to a physical quantity like current, temperature...
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  Brian Pisani

  • over 4 years ago
  • Archives
  • Precision Hub

  Delta-sigma ADC digital filter types

  Have you ever wondered how delta-sigma analog-to-digital converters (ADCs) can get such fine resolution across a variety of bandwidths? The secret lies in the digital filter. Delta-sigma ADCs are different from other types of data converters in that they...
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  Joseph Wu

  • over 5 years ago
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  Delta-sigma ADC basics: Understanding the delta-sigma modulator

  The ΔΣ ADC is constructed from a ΔΣ modulator and a digital filter. The modulator converts the analog input into a digital bit stream, while the digital filter translates the bit stream into a data word that represents the magnitude...
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  Ryan Andrews

  • over 5 years ago
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  The delta-sigma advantage to anti-aliasing filters

  My last post introduced the concept of signal aliasing and how it manifests itself in data-acquisition systems. When out-of-band signals alias into the passband, they overlap lower frequency content and mask the true signals you’re trying to measure...
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  Joseph Wu

  • over 5 years ago
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  Delta-sigma ADC basics: How the digital filter works

  Designing with a delta-sigma analog-to-digital converter can help achieve the highest possible resolution in your system. But to maximize this architecture’s benefits, it helps to understand how the delta-sigma modulator and digital filter in the...
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  Brian Pisani

  • over 4 years ago
  • Archives
  • Precision Hub

  Delta-sigma ADC digital filter types: sinc filters

  In my last post , I talked about the different types of digital filters commonly used in delta-sigma analog-to-digital converters (ADCs). In this post, let’s focus on the most common type of digital filter used in delta-sigma ADCs: the sinc filter...
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  Christopher Hall

  • over 5 years ago
  • Archives
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  Delta-sigma ADC basics: Walking around the delta-sigma blocks

  In the first two posts of the delta-sigma (ΔΣ) analog-to-digital converter (ADC) basics blog series, we have discussed the two basic building blocks used in ΔΣ ADCs: the modulator and the digital filter. You’ll encounter...
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  Christopher Hall

  • over 4 years ago
  • Archives
  • Precision Hub

  The impact of voltage reference noise on delta-sigma ADC resolution

  Have you ever evaluated the noise performance of an ADC and found that your measured performance differs from the specified performance given in the device datasheet? Achieving high resolution in a precision data-acquisition system requires some understanding...
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  Christopher Hall

  • over 4 years ago
  • Archives
  • Precision Hub

  It's in the math: how to convert an ADC code to a voltage (part 2)

  In part 1 of this series , I explained how you can calculate the input voltage to an analog-to-digital converter (ADC) by multiplying the ADC’s output code by the least-significant bit (LSB) size using Equation 1: To calculate the ADC’s...

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