## Electronics development

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Incresing A/D Resolution Posted by Hakan ALBAYRAK on 4 Dec 2000 at 2:10 PM
Hi there!<br>
My question is simple:<br>
How am i increse A/D Resolution?<br>
for example;<br>
TLC549 is a 8 bit serial A/D;<br>
min value=0<br>
max value=255<br>
<br>
how am i make max value=9999 ?<br>
(to increse one bye one)<br>
<br>
bye!

Re: Incresing A/D Resolution Posted by Al on 6 Dec 2000 at 6:28 AM
: Hi there!<br>
: My question is simple:<br>
: How am i increse A/D Resolution?<br>
: for example;<br>
: TLC549 is a 8 bit serial A/D;<br>
: min value=0<br>
: max value=255<br>
: <br>
: how am i make max value=9999 ?<br>
: (to increse one bye one)<br>
: <br>
: bye!<br>
: <br>
<br>
You will have to use an A/D chip with higher resolution: A 10 bit chip will provide a resolution of 2^10 = 1024, a 12 bit chip 2^12 = 4096 etc.<br>

Re: Re: Incresing A/D Resolution Posted by Unknown on 6 Dec 2000 at 6:57 AM
: : Hi there!<br>
: : My question is simple:<br>
: : How am i increse A/D Resolution?<br>
: : for example;<br>
: : TLC549 is a 8 bit serial A/D;<br>
: : min value=0<br>
: : max value=255<br>
: : <br>
: : how am i make max value=9999 ?<br>
: : (to increse one bye one)<br>
: : <br>
: : bye!<br>
: : <br>
: <br>
: You will have to use an A/D chip with higher resolution: A 10 bit chip will provide a resolution of 2^10 = 1024, a 12 bit chip 2^12 = 4096 etc.<br>
: <br>
: <br>
Oops!<br>
You wanted a resolution of 10000!<br>
<br>
You will have to use a chip with at least 15 bits for that resolution. A 16 bit chip is probably more common and provide a maximum resolution of 2^16 = 65536. The circuitry for high resolution A/D converters is very very critical to prevent even small variations in temperature from causing large inaccuracies in the conversion process.<br>

Re: Re: Re: Incresing A/D Resolution Posted by Hakan ALBAYRAK on 13 Dec 2000 at 1:18 PM
hi there!<br>
but i will use max res. A/D is 10 bit.<br>
i know 10bit=1024<br>
12bit=4096<br>
and other A/Ds 15,16 ... 23bit<br>
A/D resolution is increasing some methods.<br>
of course<br>
for 10bit A/D<br>
si s=sample i=indice<br>
s1=650 s2=652 s3=651 s4=649 .... s50=654<br>
average= (s1+s2+...+s50)/25<br>
at this point A/D resolution increased 2times<br>
<br>
*i look for more stable code will make this operation.<br>
<br>
thanx for all!<br>

Re: Re: Re: Re: Incresing A/D Resolution Posted by Andrea on 4 Jan 2001 at 2:47 PM
: hi there!
: but i will use max res. A/D is 10 bit.
: i know 10bit=1024
: 12bit=4096
: and other A/Ds 15,16 ... 23bit
: A/D resolution is increasing some methods.
: of course
: for 10bit A/D
: si s=sample i=indice
: s1=650 s2=652 s3=651 s4=649 .... s50=654
: average= (s1+s2+...+s50)/25
: at this point A/D resolution increased 2times
:
: *i look for more stable code will make this operation.
:
: thanx for all!
:
:
you can also increase ad resolution:
- using some A/D channel and a number of external component(op-amp)
- using an op-amp with a digital control of amp
bye

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