my own pga2310 pre-amp :) - Page 3 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

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
Reply
 
Thread Tools Search this Thread
Old 30th August 2004, 09:55 PM   #21
kafka is offline kafka  Poland
diyAudio Member
 
kafka's Avatar
 
Join Date: Jun 2004
Location: Lublin
I have a problem with shut down in OPA548. It works as -15V supply. I take 2.5V reference from TL431 and OPA inverts it with gain = 6. It works good. But I can't shut it down. I used the circut from the datasheet with dual supply mode. The e/s pin is at the same potentian as negative rail, so it should be good, but output voltage changes then from -15 to -12 and I can give quite a lot currnet.

And another question. How can I shut down reg1117(3,3V)? Any idea? I feed it from 5V regulator which is enable all the time.
  Reply With Quote
Old 31st August 2004, 03:37 PM   #22
diyAudio Member
 
Devil_H@ck's Avatar
 
Join Date: Dec 2003
Location: Belgium
Send a message via ICQ to Devil_H@ck Send a message via AIM to Devil_H@ck Send a message via MSN to Devil_H@ck
You could use a MOSFET to cut the power to the REG1117.
Normally the E/S pin on the OPA548 should allow you to disable it.
__________________
Website: http://members.lycos.nl/anthonyvh
  Reply With Quote
Old 31st August 2004, 05:02 PM   #23
kafka is offline kafka  Poland
diyAudio Member
 
kafka's Avatar
 
Join Date: Jun 2004
Location: Lublin
Quote:
Originally posted by Devil_H@ck
Normally the E/S pin on the OPA548 should allow you to disable it.
I know it should, but it don't. The rest of OPA548 works well, but they have negative rail tight GND and I can drive them from TTL levels. That one have positive rail at GND level and negative at -18V.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
PGA2310 & NE5532 get hot? sergiusz Digital Source 10 20th December 2005 12:32 PM
PGA2310 v PGA4311 daArry Digital Source 1 12th April 2005 07:52 AM
pga2310 in parallel ? blu_line Solid State 3 18th August 2004 08:22 AM
Control of PGA2310 nowater Digital Source 1 22nd January 2004 02:43 AM
CPLD vs. uC for PGA2310 ajm8372 Solid State 6 20th January 2004 10:40 PM


New To Site? Need Help?

All times are GMT. The time now is 10:07 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2