http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb This work is licensed under a Creative Commons Attribution-Noncommercial 2.5 India License.Rickey's World Disclaimer Ajay Bhargav - contact@nospam.com contact@nospam.com Mon, 01 Dec 2008 12:10:45 -0800 Mon, 01 Dec 2008 12:10:45 -0800 http://backend.userland.com/rss e107 (http://e107.org) 60 Search 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes query http://www.8051projects.net/search.php http://www.8051projects.net/forum-t10464.html wanna help to select 12 bit ADC with I2C bus.
please can any of you suggest me proper ADC which is available in INDIA.
and about programming example for same.

thank you.
free_electron]]> Mon, 30 Jun 2008 05:42:24 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html http://www.maxim-ic.com/). They are costly like 400rs for one IC.]]> Ajay<contact@nospam.com> Mon, 30 Jun 2008 06:53:33 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html thanks.]]> BJ<astrobhushan@nospam.com> Mon, 30 Jun 2008 09:09:05 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html ). If u r using the 89s52 uC than another option is to interface the ICL7135 which is a 20,000 count ADC but the interfacing is a bit tricky if u can handle it. download the datasheet of 7135 and read the 'uC interfacing using two wires' note in it.
I specifically mentioned 89s52 as it has a special feature to output a 50% duty cycle high frequency output @ p1.0 which can be used as the clock for 7135.
good luck ]]> pdi33<islurpundalik@nospam.com> Mon, 30 Jun 2008 12:11:13 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html
if u wud not mind SPI instead of I2C , u will get adc's of even more resolution and higher bits.
try googling for CS5460A it can operate as 24 bit but DElta-sigma.

the cost be as high as 60 INR
]]> shyam<shyam@nospam.com> Mon, 30 Jun 2008 23:14:53 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html

btw, is it available commonly in india? hopefully will find a sample peice here in mumbai.]]> pdi33<islurpundalik@nospam.com> Tue, 01 Jul 2008 10:47:14 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html
its called a 24 bit ADC but one can get 12-14 bits with good input filtering.

to get 24 bit resolution the input has to be very stable and should use very good filtering even then 24 bit is doubtful at the most 20-22 bit is what you get

better alternative can be AD7991 which is a 4 ch 12 bit ADC with I2C interface






there are N number of 12 bit ADCs from various companies

Arun]]> Arun Kumar V<nura1002003@nospam.com> Tue, 01 Jul 2008 18:34:22 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html .

It is neverreally hard to find an IC which can fit ur specs (just google for it) but the real challenge is knowing whether it is available in ur local market and whether it fits ur pocket or budget. .
Recently one of ur members (residing out of india) had a doubt of interfacing the AD7896 12 bit ADC so i checked its availabilty/price here and found that it cost around 1,150 INR!!!.]]> pdi33<islurpundalik@nospam.com> Tue, 01 Jul 2008 20:19:22 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html
Arun is right it is an energy meter.
easily available in Mumbai.
by the way i already have some 20+ numbers with me if u require it .

one thing to note. u will find similar notes as what Arun said @ 8052.com

it is usually used to measure RMS voltages so a little bit of extra programming is required to make the data usefull .. and that shud be done considering the so low price .
60 INR is the maximum price one wud offer u for the IC.
]]> shyam<shyam@nospam.com> Tue, 01 Jul 2008 21:10:13 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html the first thing i did when i read ur prev post , i downloaded the datasheet and came to know that it is a energy meter IC. still i feel no harm in using it as a general purpose ADC i think.
well, we do use the nokia graphical LCD for our own fancy projects though it is not meant for it don't we? ]]> pdi33<islurpundalik@nospam.com> Wed, 02 Jul 2008 02:35:53 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html but it is not available in our market in Pune!!!
any solution??????


]]> BJ<astrobhushan@nospam.com> Wed, 06 Aug 2008 03:16:54 -0700 http://www.8051projects.net/forum-t10464.html http://www.8051projects.net/forum-t10464.html i have enough of it!
]]> shyam<shyam@nospam.com> Wed, 06 Aug 2008 03:33:35 -0700 http://www.8051projects.net/forum-t10464.html