What is the fastest ADC: flash or pipeline?

[ywyw]

Hi Everybody:

Which ADC is the fastest ADC? Flash ADC or Pipeline ADC?

In my knowledge, the speed of ADC depends on its Conversion Rate or Sample Rate. This means if two type of ADC have same Conversion Rate or Sample Rate, then they have same speed, I mean they spend same time to finish one time A/D conversion. Correct?

I read ADC datasheet or article, they always talk about the speed of flash ADC is faster then Pipeline ADC but without comparing condition. They still talk about the speed of semi-flash ADC is half speed of flash ADC without comparing condition.

I got confused on this question:

(1)When people talk about the speed of flash ADC is faster then Pipeline ADC, what is their comparing condition?
(2)If a Flash ADC and a Pipeline ADC have same Conversion Rate, do they have same speed? If the answer is yes, then who want to spend more money and power to bay and use flash ADC with lower resolution? If the answer is no, which answer is correct?

Thanks in advance.

:?:

 

[A.Anand Srinivasan]

Re: The fastest ADC?

the flash ADC is faster..... it is related to the latency between the input and the output of the ADC.... this latency is measured in terms of the number of clock cycles required for an particular ADC to convert an given input into an output.....