[SOLVED] what we mean by dual channel analog to digital convertor

[moonnightingale]

I know what is A to d and D to A
but what we mean by dual channel ADC and dual channel DAC

 

[alexan_e]

A dual channel ADC or DAC can do 2 conversions simultaneously,it has 2 conversion units,
on the other hand there are some 8 channel ADC for example in which you choose the input channel and then the the conversion unit does the conversion of the signal in that input,
if you want a conversion in another input you have to switch input and start a new conversion, only one conversion can happen at any given moment in that kind of ADC.

Alex

 

[moonnightingale]

Can it do two conversions to one input or two conversions to two different inputs

 

[alexan_e]

No it can't do 2 conversion in the same input, each input is tied to a different conversion circuit,
all these info are always included in the datasheet of the device,
number of inputs , delays when switching input, conversion time etc.

this is an example of a dual channel ADC
AD9288 | 8-Bit, 40/80/100 MSPS Dual A/D Converter | All A/D Converters | Analog to Digital Converters | Analog Devices
check the functional block diagram.

Alex

 

[checkmate]

Most ADCs require at least 2 stages, a sample one and a conversion one.
Having 2 ADCs allow them to be pipelined for continuous conversion.