Powering a PGA2310

Ductapemaster · 10th May 2008, 07:13 AM

Hi, I'm new to the forum...I'm working on a preamp based around the TI PGA2310 attenuator chip and I need some help with picking out a transformer that will supply sufficient current to power the chip. I have a +/- 15 volt regulator schematic already and I just need the xformer. How much power does the PGA require? My LM317/337's can't supply more than 1.5 amps each so I know I need that much or less from a transformer. Is an amp per rail sufficient? I'm trying to keep my preamp in a 2 inch tall box and I need to use the smallest transformer possible (and toroidal ones are really expensive for the specs I want).

Any suggestions?

Thanks!

-Dan

peufeu · 10th May 2008, 07:22 AM

Read the datasheet

A very small transformer will probably be sufficient.

ifrythings · 10th May 2008, 08:41 AM

+ 100mA would be over kill for that chip. It's idle current isn't even 15mA.

peufeu · 10th May 2008, 09:16 AM

Yeah the power LED will draw more current than the PGA2310, lol.

Ductapemaster · 13th May 2008, 02:49 PM

Thanks a lot guys. I looked through the datasheet a few times and I didn't see anything like those numbers (except the idle current) but it's probably in there somewhere...

Awesome. This will save me some $$$

-Dan

theAnonymous1 · 13th May 2008, 03:07 PM

Dan,

I have some small dual secondary transformers that would be suitable. They are Zettler Magnetics 44215. You can find them on this page.

You can have a few of them for just the cost of shipping.

10th May 2008, 07:13 AM	#1
Ductapemaster diyAudio Member Join Date: May 2008	Powering a PGA2310 Hi, I'm new to the forum...I'm working on a preamp based around the TI PGA2310 attenuator chip and I need some help with picking out a transformer that will supply sufficient current to power the chip. I have a +/- 15 volt regulator schematic already and I just need the xformer. How much power does the PGA require? My LM317/337's can't supply more than 1.5 amps each so I know I need that much or less from a transformer. Is an amp per rail sufficient? I'm trying to keep my preamp in a 2 inch tall box and I need to use the smallest transformer possible (and toroidal ones are really expensive for the specs I want). Any suggestions? Thanks! -Dan

13th May 2008, 03:07 PM	#6
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	Dan, I have some small dual secondary transformers that would be suitable. They are Zettler Magnetics 44215. You can find them on this page. You can have a few of them for just the cost of shipping. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
No microcontroller for PGA2310?	louischia	Chip Amps	12	4th March 2007 06:12 PM
PGA2310 noise	fallow	Digital Source	27	29th March 2006 06:59 PM
my own pga2310 pre-amp :)	veteran	Digital Source	22	31st August 2004 05:02 PM
pga2310 in parallel ?	blu_line	Solid State	3	18th August 2004 08:22 AM
CPLD vs. uC for PGA2310	ajm8372	Solid State	6	20th January 2004 10:40 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

10th May 2008, 07:22 AM	#2
peufeu diyAudio Member Join Date: Mar 2001 Location: Lyon, France	Read the datasheet A very small transformer will probably be sufficient.

10th May 2008, 08:41 AM	#3
ifrythings diyAudio Member Join Date: Oct 2005	+ 100mA would be over kill for that chip. It's idle current isn't even 15mA.

10th May 2008, 09:16 AM	#4
peufeu diyAudio Member Join Date: Mar 2001 Location: Lyon, France	Yeah the power LED will draw more current than the PGA2310, lol.

13th May 2008, 02:49 PM	#5
Ductapemaster diyAudio Member Join Date: May 2008	Thanks a lot guys. I looked through the datasheet a few times and I didn't see anything like those numbers (except the idle current) but it's probably in there somewhere... Awesome. This will save me some $$$ -Dan

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)