Dear Team,

May I know the difference between ADC sampling rate and data rate .

If the sampling rate is 125Ksps,can I say data rate is also 125Ksps

 

Data rate is the speed at which bytes (or chunks of data) are sent down a channel.
https://en.wikipedia.org/wiki/Sampling_(signal_processing)

 

That is a general explanation.if you don't mind can you give an answer more specific to ADC

 

My understanding is that ADC (Analog to Digital Conversion) sampling rate is the number of samples per second, whereas data rate usually refers to the number of bit transferred in one second. So if you are sampling an analog signal with 10 bit resolution (i.e. 2^10 = 1024 so about 0.1% of the scale per bit) 1,000 times a second you'd need to pass this through a serial link at a data rate of 10,000 bits per second, plus maybe a bit of overhead.

 

Dear Team,

May I know the difference between ADC sampling rate and data rate .

If the sampling rate is 125Ksps,can I say data rate is also 125Ksps

Depends on what data you are talking about. Usually data rate is expressed in either bits/sec or bytes/sec, not in samples/second.

 

Yes

Dear Team,

May I know the difference between ADC sampling rate and data rate .

If the sampling rate is 125Ksps,can I say data rate is also 125Ksps

Yes you can.
If your sampling at 125 ksps then yiu have 125000 samples per second.
Assuming the adc is putting out in digitally all the samples that is. Most do.
The data rate is the number of bits in each sample times the sample rate
So if 10 bits, then that would be 1250 kbit per second , or another way 1.25 Mbit per second,
But it's still 125k samples per second.

 

Thank you.
That explanation is very clear.

 

Thank you.
That explanation is very clear.

It depends on the the type of ADC. For a delta-sigma ADC you have the sample-rate (that might be in the MHz), the Decimation 'rate/ratio' and a data rate for the converted digital bits.

https://www.rpi.edu/dept/ecse/rta/LMS/Delta-Sigma_ADCs.pdf

Although most converters have only one sample rate, delta-sigma converters have two: the input sampling rate and the output-data rate. The ratio of these two meaningful variables defines the system’s decimation ratio. A strong relationship exists between the decimation ratio and the converter’s effective resolution.

 

It depends on the the type of ADC. For a delta-sigma ADC you have the sample-rate (that might be in the MHz), the Decimation 'rate/ratio' and a data rate for the converted digital bits.
View attachment 303050
https://www.rpi.edu/dept/ecse/rta/LMS/Delta-Sigma_ADCs.pdf

Your right @nsaspook
As I mentioned @hoyyoth , there are exceptions.
Some adcs, such as the mentioned delta sigma , or RF sampling DACs with built in down convertors , there is a difference .
But , these are not your simple adc.