Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

Accurate SPICE macromodels for some op amps
Accurate SPICE macromodels for some op amps
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 9th May 2019, 08:36 PM   #1
Nazar_lv is offline Nazar_lv  Europe
diyAudio Member
 
Nazar_lv's Avatar
 
Join Date: Oct 2009
Location: Lviv
Send a message via ICQ to Nazar_lv
Default Accurate SPICE macromodels for some op amps

OP07 model
  • OP07_SN - TI/AD +-15V
  • OP07_5V_SN - TI/AD +-5V
TL071 / TL072 / TL074 model
  • TL071_SN - Texas Instruments
LF356 model
  • LF356_SN - National Semiconductor
NE5534 model
  • NJM5534_SN - JRC
  • NE5534ON_SN - ON Semiconductor
  • NE5534PH_SN - Philips
  • NE5534TI_SN - Texas Instruments
NE5532 model
  • NJM5532_SN - JRC
  • NE5532TI_SN - Texas Instruments
LM318 model
  • LM318NS_SN - National Semiconductor
  • LM318TI_SN - Texas Instruments
  • LT318A_SN - Linear Technology
OP467 model
  • OP467_SN - Analog devices
THS4011 / THS4012 model
  • THS4011_SN - Texas Instruments
AD8055 / AD8056 model
  • AD8055_SN - Analog devices
LM6171 model
  • LM6171_SN - National Semiconductor
LM6172 model
  • LM6172_SN - National Semiconductor
LM7171 model
  • LM7171_SN - National Semiconductor

Download page

There will be more models when i have free time
__________________
"In developing audio devices we can always find creative non standart solutions that will ensure the best sound" (с) S-Audio.Systems
  Reply With Quote
Old 10th May 2019, 01:35 AM   #2
Dave Zan is offline Dave Zan  Australia
diyAudio Member
 
Join Date: Nov 2010
Quote:
Originally Posted by Nazar_lv View Post
...There will be more models when i have free time
That looks like nice work, my compliments, I liked the reference paper.
When you do more models I hope they include the AD797.

Best wishes
David
  Reply With Quote
Old 10th May 2019, 01:51 AM   #3
Monte McGuire is offline Monte McGuire
diyAudio Member
 
Join Date: Jul 2013
Accurate SPICE macromodels for some op amps
Analog Devices offers an AD797 model that seems pretty accurate at least in terms of stability and dynamical response: License agreement for Spice Models | Analog Devices

The AD797 product page has a few other variant models, probably to handle slightly different expected offsets or other parameters.
  Reply With Quote
Old 10th May 2019, 03:00 AM   #4
Dave Zan is offline Dave Zan  Australia
diyAudio Member
 
Join Date: Nov 2010
Quote:
Originally Posted by Monte McGuire View Post
...Devices offers an AD797 model that seems pretty accurate at least in terms of stability and dynamical response...
A lot of the manufacturers models have the dynamic response OK but are otherwise fairly poor, don't model power draw from the rails, don't have correct PSRR because they assume a (non existent) internal earth connection, and so on.
I don't know if the AD model is acceptable or not but Nazar's paper shows that he has included many aspects that are often not correct.
So I would be more confident of his work than the AD model.
But the AD model may be fine, what have you checked?

Best wishes
David
  Reply With Quote
Old 10th May 2019, 08:48 AM   #5
Nazar_lv is offline Nazar_lv  Europe
diyAudio Member
 
Nazar_lv's Avatar
 
Join Date: Oct 2009
Location: Lviv
Send a message via ICQ to Nazar_lv
Thx David.

Often datasheet data are far away from reality, thats why i measure open loop gain(with different loads), CMRR, open loop output impedance as most important parameters.
__________________
"In developing audio devices we can always find creative non standart solutions that will ensure the best sound" (с) S-Audio.Systems
  Reply With Quote
Old 16th May 2019, 12:21 PM   #6
Dave Zan is offline Dave Zan  Australia
diyAudio Member
 
Join Date: Nov 2010
Quote:
Originally Posted by Nazar_lv View Post
Often datasheet data are far away from reality...
I checked the AD797 model and it sure doesn't match reality, or even the datasheet, on PSRR but at least it draws power from the rails.
I didn't notice temperature effects modelled in the net-list, but I didn't check this because it's mostly irrelevant for audio.

It is curious that the AD797 is not included with LTSpice, since AD owns LTSpice.
I assume Mike E. does not want to include components unless their models meet his standards, and that the LTspice staff don't yet have an acceptable model.
In the meantime I have a micro-model that is usable.
Thanks to Monte for the prompt to look at this.

Best wishes
David
  Reply With Quote
Old 16th May 2019, 07:43 PM   #7
Monte McGuire is offline Monte McGuire
diyAudio Member
 
Join Date: Jul 2013
Accurate SPICE macromodels for some op amps
I think the reason that the 797 is not in the LTspice distribution is because historically, only Linear components were installed. The merger between Analog and Linear is somewhat recent, and the Analog models are not of Linear origin. So, it's probably an artifact of all of the consolidation that's been happening.

I've never tested many aspects of the 797 model - thanks for doing that! I use LTspice primarily for stability and noise analysis, and also DC offset, so most 'fake' models using poles zeroes and pure gains with some pseudo-real IO components seem to work well enough. If I can get the circuit and surrounding passive component values to be at least somewhat plausible, then it can go into a PCB and be tested for real.
  Reply With Quote
Old 12th November 2019, 11:08 PM   #8
Nazar_lv is offline Nazar_lv  Europe
diyAudio Member
 
Nazar_lv's Avatar
 
Join Date: Oct 2009
Location: Lviv
Send a message via ICQ to Nazar_lv
updated some models
__________________
"In developing audio devices we can always find creative non standart solutions that will ensure the best sound" (с) S-Audio.Systems
  Reply With Quote

Reply


Accurate SPICE macromodels for some op ampsHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
[WP] Designing an Accurate SPICE Macromodel Nazar_lv Software Tools 3 9th April 2018 12:12 PM
Are distortion ratings accurate for most amps? maggiesnmacs Pass Labs 19 8th April 2016 10:25 PM
spice distortion dynamics of tube power amps hpupo Software Tools 2 22nd March 2012 08:15 PM
What known accurate spice models are around? jez Solid State 15 13th July 2011 01:29 AM
Duncan Amps spice model docs... nickds1 Tubes / Valves 2 23rd February 2007 03:32 PM


New To Site? Need Help?

All times are GMT. The time now is 09:45 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki