Sunday, October 12, 2008

The need for Analog to Digital Converters

We have seen the advantages of digital signals over the analog signals in transmission of signals. Microcontrollers are very efficient at processing digital numbers, but they cannot handle analog signals directly. An analog-to-digital converter, converts an analog voltage level to a digital number. The microcontroller can then efficiently process the digital representation of the original analog voltage. By definition, digital numbers are non-fractional whole numbers.
In this example, an input voltage of 2.343 volts is converted to 87. The user’s software can use the value 87 as the representation of the original input voltage. The analog input voltage must be within the valid input range of the A/D for accurate conversion. Hope you would have heard about the quantization process of rounding off and the quantization error. The A/D converter which is having higher resolution gives less quantization errors. Hence a 12-bit converter which has 4096 states is much efficient than a 10-bit converter that has 1024 states.


Richa said...


I am Richa from SiliconIndia. I am also an avid blogger for a while now and participating actively in Indian blogosphere. I read your blog posting and found them very interesting and informative. We would love to see a copy of your blogs posted here, whenever you are posting it on Here are some of the benefits of posting your blogs here:

We have a strong community of 1 Million professionals
Best blogs of 2008 to be published in a book "SiliconIndia bLoG PrinT"
Best blog to be printed in SliconIndia & SmartTechie magazines each month
Chance to be featured on homepage everyday
There are 10,000 active bloggers who participate in active blogging

We appreciate your community initiative here and in helping build a more powerful India! Also, if you have any ideas or want to volunteer to help for SiliconIndia, we would be more than excited to get your help. Pls mail me back at with your suggestions and feedback.

Blog Editor – SiliconIndia

2011disaster said...

How many samples that we can take for a temperature sensor using ADC? like our voice sampling rate could you please help me about this.

Jiya Singh said...

This is an informational post share by you. Thanks for sharing it with us.

Linux Device Drivers Course