Question abouat ADC channels

Neutrons · Aug 29, 2016

Hi,

I have a question about the channels of an ADC. I was trying to make a multichannel analyser with a successive approximation ADC (ADCS7477) for a spectrometry experiment. The ADC has a 10 bit resolution.
Does this mean that there are 1024 channels (2¹⁰)?

KlausST · Aug 29, 2016

Hi,

it seems you are not aware of the basic theory of operationof an ADC.

Please study the operation of an ADC.

***
To your question.
No. It doesn´t have 1024 input channels. How could this be with just 6 terminals.
10 bit resolution means it can measure 2^10 different levels of voltage within it´s full scale input voltage range (in this case VDD).

Klaus

bravoegg · Aug 30, 2016

if you connect the ADC chip with a 2.7v V_DD, then the resolution is

Code:

2.7 / 2^10 = 0.0026

when the ADC detects a anolog voltage of 0.0026, it'll convert it into its digital form: 10'b00_0000_0001.

update:

Code:

Code transitions occur midway between successive integer LSB values

The datasheet has all the information you need.

Question abouat ADC channels

Neutrons

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KlausST

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bravoegg

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Question abouat ADC channels

Neutrons

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