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Maithil Pachchigar

Which Is Better: SAR or Delta-Sigma ADCs?

Maithil Pachchigar
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SunitaT0
SunitaT0
11/30/2013 10:37:57 PM
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Master
Re : Which Is Better: SAR or Delta-Sigma ADCs?
But oversampling is tougher to implement when fast switching between input channels is required.

Agreed, oversampling is tougher to implement when fast switching happens and that is the reason sigma-delta finds application in low-frequency applications.

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Maithil Pachchigar
Maithil Pachchigar
11/18/2013 2:46:34 PM
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Newbie
Re: Other factors to be considered
You are absolutely correct on the point you made.

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DaeJ
DaeJ
11/16/2013 9:53:36 AM
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Other factors to be considered
Implementation view point:

We might consider not only resolution (bits), but also max sampling rate, differential nonlinearity, Signal noise ratio, power consumption and unit price in addition with I/O type such as SPI and serial LVDS. A different application may yield a different preference.

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Maithil
Maithil
11/5/2013 11:52:19 AM
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Re : Which Is Better: SAR or Delta-Sigma ADCs?
Hello Everyone,

Thanks for sharing your thoughts and feedback on this.

Regards,

Maithil

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antedeluvian
antedeluvian
10/28/2013 1:06:04 PM
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Re: Re : Which Is Better: SAR or Delta-Sigma ADCs?
Dennis

 

I have a basic question about the name of the ADC. ADI in the past called them sigma-delta converters. Now I notice that they are being called delta-sigma converters.

Some time ago I heard Bonnie Baker (IIRC) suggest that the word inversion happens at the Mason Dixon line.

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JAYARAMAN KIRUTHI VASAN
JAYARAMAN KIRUTHI VASAN
10/28/2013 4:41:10 AM
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Master
Re: Applications
Vishal,

Moving average is a handy technique used all the time in Analog intensive applications. I remember a Analog Devices application note on weighing scales and a high resolution ADC where they have also given techniques to make the display change in proportional to incoming data while still maintaining the averaging.

I have use moving average techniques even in RPM measurements.

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samicksha
samicksha
10/28/2013 3:05:18 AM
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Student
Re: Applications
You are right netcrawl, SAR converter has a wide input bandwidth, but at application level how do we identify b/w these converters.

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D Feucht
D Feucht
10/27/2013 11:02:26 PM
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Blogger
Re: Re : Which Is Better: SAR or Delta-Sigma ADCs?
Maithil,

I have a basic question about the name of the ADC. ADI in the past called them sigma-delta converters. Now I notice that they are being called delta-sigma converters. Has some standardization of the name occurred in the industry?

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yalanand
yalanand
10/27/2013 7:02:54 AM
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Newbie
Re : Which Is Better: SAR or Delta-Sigma ADCs?
Delta-sigma-ADC expertise has held up to that of SAR ADCs in sampling frequency. A limit in sampling-time areas of almost 100 kHz to 1 MHz happens in both sorts of devices. These 2 sorts of converters also match in maximum key specifications.

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DaeJ
DaeJ
10/26/2013 6:13:55 PM
User Rank
Master
Power consumption of each method
I wonder whether there is a comparison data analysis of current consumption between SAR and Delta-Sigma ADC. Typically, in portable electronic gadgets, expanding for battery life is very critical factor, even though digital output resolution affects the system performance. It is not necessary for some application to get the high resolution which might overload CPU horsepower and price. I thought that comparison would be slightly different among semiconductor chips.

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