1nV unity gain stable opamp from ADI - diyAudio
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Old 12th December 2005, 07:15 PM   #1
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Default 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
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Old 13th December 2005, 01:16 AM   #2
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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
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Old 13th December 2005, 06:15 PM   #3
jcx is offline jcx  United States
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1/f corner? - many new op amps are really bad >1 KHz, even 10 KHz
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Old 13th December 2005, 06:33 PM   #4
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... and this will result in noise levels like...? This is nothing to worry about. Noise is important above 1 kHz or so.
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Old 13th December 2005, 06:34 PM   #5
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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.
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Old 13th December 2005, 06:41 PM   #6
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5pA/srtHz at 1KHz
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Old 13th December 2005, 06:42 PM   #7
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openloop is relative low (80dB) but flat all the way up to 20KHz ..
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Old 13th December 2005, 07:06 PM   #8
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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.
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