OPA642 for I/V Conversion? - 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 19th July 2003, 02:22 AM   #1
diyAudio Member
 
Join Date: Jul 2003
Location: Indiana
Default OPA642 for I/V Conversion?

Hello!

I have heard that the OPA642 op-amp is a very good
choice for I/V conversion compared to many other chips
available. Does anyone have opinions or experiences
with this chip for I/V, or how it compares to units like
the AD811, OPA627, etc? TI lists I/V as an appropriate
usage of this particular op-amp.

Many Thanks!

Fastcat
  Reply With Quote
Old 19th July 2003, 08:29 PM   #2
diyAudio Member
 
apassgear's Avatar
 
Join Date: Nov 2002
Location: Viņa del Mar, Torreon
Default Re: OPA642 for I/V Conversion?

Quote:
Originally posted by fastcat95


I have heard that the OPA642 op-amp is a very good
choice for I/V conversion compared to many other chips
available. Does anyone have opinions or experiences
with this chip for I/V, or how it compares to units like
the AD811, OPA627, etc? TI lists I/V as an appropriate
usage of this particular op-amp.

Have you thought of using an OPA660?

Check the thread OPA660 I/V. this could be a better alternative.
  Reply With Quote
Old 22nd July 2003, 07:04 AM   #3
Nicke is offline Nicke  Sweden
diyAudio Member
 
Nicke's Avatar
 
Join Date: Jun 2001
Location: Sweden
Default Re: OPA642 for I/V Conversion?

Quote:
Originally posted by fastcat95
Hello!

I have heard that the OPA642 op-amp is a very good
choice for I/V conversion compared to many other chips
available. Does anyone have opinions or experiences
with this chip for I/V, or how it compares to units like
the AD811, OPA627, etc? TI lists I/V as an appropriate
usage of this particular op-amp.

Many Thanks!

Fastcat

Why donīt you try this one ?



Jockoīs I-V stage
  Reply With Quote
Old 22nd July 2003, 12:16 PM   #4
diyAudio Member
 
Join Date: Jul 2003
Location: Indiana
Hello!

Is it possible to run Jocko's output stage at
+/- 15 VDC? Also, will it work properly with
the PCM 1702 DAC chip to give 2 VRMS out?
Does the circuit have any low pass filtering
for the 8X oversampling built into it?

Many Thanks!

Fastcat
  Reply With Quote
Old 23rd July 2003, 06:54 AM   #5
Nicke is offline Nicke  Sweden
diyAudio Member
 
Nicke's Avatar
 
Join Date: Jun 2001
Location: Sweden
Quote:
Originally posted by fastcat95
Hello!

Is it possible to run Jocko's output stage at
+/- 15 VDC? Also, will it work properly with
the PCM 1702 DAC chip to give 2 VRMS out?
Does the circuit have any low pass filtering
for the 8X oversampling built into it?

Many Thanks!

Fastcat
I donīt use exactly the circuit published but my circuit is quite similar.
It runs on +-15 V rails coupled to a pair of PCM63īs.
The only lowpass filtering is a cap across the I-V conversion resistor.

Nicke
  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
SVC to DVC conversion madstamm Subwoofers 8 13th January 2008 04:45 PM
dB/W/M conversion - M vs 0.5 M ?? MadMutt Multi-Way 3 26th December 2007 12:51 PM
24 to 18 bit conversion ??? Lyra Digital Source 13 9th March 2006 02:03 PM
9v to 12v conversion purprobe Parts 2 17th September 2005 09:37 PM
PCM to DSD conversion liz Digital Source 6 2nd October 2003 08:53 AM


New To Site? Need Help?

All times are GMT. The time now is 12:30 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright Đ1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2