pga2310 output resistors - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, 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 20th March 2011, 07:40 PM   #1
diyAudio Member
 
Join Date: Feb 2009
Default pga2310 output resistors

Well after a failed attempt to get a volumite working im looking for alternatives for a preamp. I have a +-12v supply and a spare pga2310 setup. However it is just raw in and out, there is no buffers or coupling caps. This is fine for the input since my dac is both cap coupled and using an opamp for balanced to unbalanced conversion.

However the output is what im worried about. Should i put some resistors in line with the output to protect the pga? Something like 100-1k or something?

My other option was to build another amb mini3 with a gain of 2 using a LME49720/LM4562 with a 10k stepped attenuator.

Im not sure which is better, i havent heard the pga, and i have a stock mini3 with a 50k stepped that sounds great to me, but its for headphone use.
  Reply With Quote
Old 21st March 2011, 09:56 AM   #2
Bonsai is offline Bonsai  Taiwan
diyAudio Member
 
Bonsai's Avatar
 
Join Date: Jul 2003
Location: Taipei, Taiwan
The PGA2310 is short ciruit proof.

However, it is ALWAYS advisable to include 50 Ohms resistor in series with the output of any op-amp (in this case the internal op-amp gain/buffer stage) in order to prevent instability when driving capacitive loads, which is typically what you will find when driving a cable.
__________________
bonsai
Amplifier Design and Construction for MUSIC! http://hifisonix.com/
  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 output buffer? Freddie Solid State 26 13th February 2008 11:09 PM
output resistors questions Svetlana Pass Labs 1 2nd July 2004 10:55 AM
Resistors in the output stage Solid Snake Solid State 42 18th January 2004 09:56 PM
output transistor resistors fezz Parts 6 22nd September 2003 09:11 PM


New To Site? Need Help?

All times are GMT. The time now is 07:27 PM.


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