1nV unity gain stable opamp from ADI

jackinnj · 12th December 2005, 06:15 PM

in the inbox from Analog Devices, a new unity gain stable, nanovolt noise, voltage feedback opamp from ADI
http://www.analog.com/UploadedFiles/...DA4899_1_0.pdf

carlosfm · 13th December 2005, 12:16 AM

Nice, but low PSU voltage...
The same with the OPA847, and not unity gain stable, but 0.85nV/Hz input voltage noise.

http://focus.ti.com/docs/prod/folders/print/opa847.html

jcx · 13th December 2005, 05:15 PM

1/f corner? - many new op amps are really bad >1 KHz, even 10 KHz

peranders · 13th December 2005, 05:33 PM

... and this will result in noise levels like...? This is nothing to worry about. Noise is important above 1 kHz or so.

nuvistor · 13th December 2005, 05:34 PM

Quote:

Originally posted by jcx
1/f corner? - many new op amps are really bad >1 KHz, even 10 KHz

en and in 1/f about 1kHz, see datasheet fig 13 and 16 on page 8. 10nv/rthz en at 10Hz, not bad but AD797 is about 5X better here.

tschrama · 13th December 2005, 05:41 PM

5pA/srtHz at 1KHz

tschrama · 13th December 2005, 05:42 PM

openloop is relative low (80dB) but flat all the way up to 20KHz ..

jackinnj · 13th December 2005, 06:06 PM

Quote:

Originally posted by peranders
... and this will result in noise levels like...? This is nothing to worry about. Noise is important above 1 kHz or so.

LF noise (from milliHz to a few tens of Hz) is very important for industrial T&M applications.

12th December 2005, 06:15 PM	#1
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	1nV unity gain stable opamp from ADI in the inbox from Analog Devices, a new unity gain stable, nanovolt noise, voltage feedback opamp from ADI http://www.analog.com/UploadedFiles/...DA4899_1_0.pdf

13th December 2005, 05:33 PM	#4
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	... and this will result in noise levels like...? This is nothing to worry about. Noise is important above 1 kHz or so. __________________ /Per-Anders (my first name) or P-A as my friends call me

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
BOSOZ unity gain stable	AudioAngel	Pass Labs	1	21st August 2008 09:20 PM
Opamp question regarding unity gain	markiemrboo	Chip Amps	12	15th February 2007 03:40 PM
Heretical Unity Gain line stage PLUS a little gain ?	yagas	Tubes / Valves	7	24th January 2006 01:30 PM
NI unity gain opamp equivalent but with discretes needed	jondoe	Solid State	5	10th December 2004 06:45 PM
Opamp + buffer, how to bypass buffer at HF for unity gain?	Christer	Solid State	10	29th October 2003 06:50 AM

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

13th December 2005, 12:16 AM	#2
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	Nice, but low PSU voltage... The same with the OPA847, and not unity gain stable, but 0.85nV/Hz input voltage noise. http://focus.ti.com/docs/prod/folders/print/opa847.html

13th December 2005, 05:15 PM	#3
jcx diyAudio Member Join Date: Feb 2003 Location: ..	1/f corner? - many new op amps are really bad >1 KHz, even 10 KHz

13th December 2005, 05:41 PM	#6
tschrama diyAudio Member Join Date: Jul 2001 Location: The Netherlands	5pA/srtHz at 1KHz

13th December 2005, 05:42 PM	#7
tschrama diyAudio Member Join Date: Jul 2001 Location: The Netherlands	openloop is relative low (80dB) but flat all the way up to 20KHz ..

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