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  • Author Author: rscasny
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SAR ADC or Delta Sigma ADC? What's Your Preference?

Successive approximation register (SAR) analog to digital converters (ADCs) take a continuous analog waveform and converts it into a discrete digital representation via a binary search through all possible quantization levels before converging upon a digital output.

 

Conversely, Delta-Sigma ADCs employ different configurations of complicated digital filtering to enhance the overall resolution of the ADC.

 

SAR and Delta-Sigma are two of the most common types of precision analog-to-digital converters (ADCs) available today.

 

If you're a design engineer, do you have a preference? If so, why? Leave a comment below.

 

If you're not sure, then please attend the March 22nd Webinar: TI SAR ADCs vs. Delta-Sigma ADCs: Different Architectures for Different Applications

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  • @Randall,

     

    No rational engineer could possibly have a general preference for one type over the other:-  the part you use will depend on the application - but I think you know that. I won't vote.

     

    @Jeff

     

    Sigma delta converters have several other advantages: inherent built in anti alias filter, frequently have adjustable sample rates and noise shaping, higher resolution regardless of cost , often offer additional signal processing on chip.

     

    Of course SAR converters have their own advantages like low latency, precision control over sampling time is possible, power tracks the actual sample rate.

     

    MK

Comment

  • @Randall,

     

    No rational engineer could possibly have a general preference for one type over the other:-  the part you use will depend on the application - but I think you know that. I won't vote.

     

    @Jeff

     

    Sigma delta converters have several other advantages: inherent built in anti alias filter, frequently have adjustable sample rates and noise shaping, higher resolution regardless of cost , often offer additional signal processing on chip.

     

    Of course SAR converters have their own advantages like low latency, precision control over sampling time is possible, power tracks the actual sample rate.

     

    MK

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