+/- supply frm single chip
Bookmark this page:
 Yahoo!
 Google
 Windows Live
 del.icio.us
 digg
 Netscape
|
|
|||||||||||||||||||||||||||||||||||||||||||
|
Posted by John Fields on August 19, 2006, 9:45 am
Please log in for more thread options On Sat, 19 Aug 2006 14:02:22 +0100, Eeyore >> On Sat, 19 Aug 2006 13:17:21 +0100, Eeyore
>> >> >"aaryaluv@gmail.com" wrote:
>> > >> >> i m doin 1 project where i need 2 supply power 2 ADC AD677 ... i need >> >> +/- 5/12 volts..i want this all frm single chip instead of using >> >> 7805,7812,7905 & 7912. >> > >> >What's the big deal about using '1 chip' only ? >>
>> He asked for help, not asinine bullshit. >
>There are some single chip twin rail ICs but they're quite expensive and not >widely available. I'm trying to find out the underlying reason for the question >so as to be able to give a decent answer. --- The big deal is, that's what he wants, and a decent answer, you rude piece of shit, might have been: "I don't think what you want is available, but there are some single chip twin rail ICs which are quite expensive and not widely available. Is there any reason why you can't use conventional supplies? -- John Fields Professional Circuit Designer | |||||||||||||||||||||||||||||||||||||||||||
|
Posted by Eeyore on August 19, 2006, 11:16 am
Please log in for more thread options John Fields wrote: > On Sat, 19 Aug 2006 14:02:22 +0100, Eeyore
> > >John Fields wrote:
> > > >> On Sat, 19 Aug 2006 13:17:21 +0100, Eeyore
> >> > >> >"aaryaluv@gmail.com" wrote: > >> > > >> >> i m doin 1 project where i need 2 supply power 2 ADC AD677 ... i need > >> >> +/- 5/12 volts..i want this all frm single chip instead of using > >> >> 7805,7812,7905 & 7912. > >> > > >> >What's the big deal about using '1 chip' only ? > >> > >> He asked for help, not asinine bullshit. > >
question
> >There are some single chip twin rail ICs but they're quite expensive and not > >widely available. I'm trying to find out the underlying reason for the > >so as to be able to give a decent answer.
>
> --- > The big deal is, that's what he wants, and a decent answer, you rude > piece of shit, might have been: "I don't think what you want is > available, but there are some single chip twin rail ICs which are > quite expensive and not widely available. Is there any reason why > you can't use conventional supplies? Still doesn't answer why he's so keen t use a single chip though. Really also need to know what the proposed power source is. As in is it necessasry to creat a 'false ground'. To be honest *any* further information at all would be useful. Got out the wrong side of bad today did you btw ? Graham p.s. what's your feeling about the terror con being foisted on the public ? | |||||||||||||||||||||||||||||||||||||||||||
|
Posted by Chris on August 19, 2006, 11:29 am
Please log in for more thread options
aaryaluv@gmail.com wrote: > i m doin 1 project where i need 2 supply power 2 ADC AD677 ... i need
> +/- 5/12 volts..i want this all frm single chip instead of using > 7805,7812,7905 & 7912. > > can u help me In order to get a more helpful answer, you have to tell what you've got as an input voltage, and how much power you need for the other stuff. I'm also wondering where your requirement for -5VDC is coming from -- the AD677 only requires a +5 for logic and a +/-12V for the analog side. Apart from all that, no single IC exists that can do what you want. Linear regulators are cheap and efficient -- splurge a little. But if you want maximum simplicity or absolute minimum space, try purchasing a small AC-to-DC converter which will give you the three voltages. And please hold off on the text lingo unless you're kidnapped and are being confined in a car trunk. It gives the impression you can't even be bothered to express yourself clearly. That's not a good impression to give if you're asking for someone to craft a ldetailed, cogent answer. Good luck Chris | |||||||||||||||||||||||||||||||||||||||||||
|
Posted by aaryaluv@gmail.com on August 19, 2006, 3:38 pm
Please log in for more thread options
Vin is 20 V...and i hv been told 2 use a single chip...i can use the above mentioned chips..but i hv 2 use a single chip which is a cheap 1 too... | |||||||||||||||||||||||||||||||||||||||||||
|
Posted by John Fields on August 19, 2006, 4:15 pm
Please log in for more thread options
On 19 Aug 2006 12:38:13 -0700, "aaryaluv@gmail.com" >Vin is 20 V...and i hv been told 2 use a single chip...i can use the
>above mentioned chips..but i hv 2 use a single chip which is a cheap 1 >too... --- So for a Vin of 20V you _have_ to get +5V, -5V, +12V, and -12V all out of the same chip? Sorry, Charlie... -- John Fields Professional Circuit Designer | |||||||||||||||||||||||||||||||||||||||||||
| Similar Threads | Posted |
| +/- supply frm single chip | August 19, 2006, 3:05 am |
| single chip music player | September 6, 2005, 3:45 pm |
| PIC16F628 Single Chip Stamp 1 Compatible | May 7, 2005, 2:24 pm |
| Using a single power supply for dual supply "Sample and Hold" | October 24, 2005, 3:26 pm |
| Converting dual or balanced supply circuit to single supply? | June 19, 2007, 10:46 am |
| Single supply and split / dual supply | July 26, 2007, 10:55 am |
| Single Supply Op-Amp | October 30, 2004, 7:26 pm |
| single supply opamp | March 27, 2005, 8:44 pm |
| LM1875 on a single supply | July 1, 2008, 2:30 pm |
| 60 amp single pahese 240 volt AC supply (UK) | November 25, 2005, 9:30 pm |
| General purpose single-supply op-amp? | April 1, 2007, 10:32 am |
| Single supply opamp calculations | June 18, 2007, 3:02 pm |
| Half-wave rectifier opamp in single supply | June 22, 2007, 4:27 pm |
| Using a single resistor with several LEDs | July 31, 2004, 4:39 am |
| Signals on a single wire | April 3, 2005, 4:07 pm |
>
>John Fields wrote:
>