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Old 20th December 2014, 12:02 AM   #1
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Default Wishlist: Op Amp Characterization Curves in Datasheets

Since it's the holiday season I thought a wishlist thread would be appropriate! So what additional characterization curves do you wish to see added to op amp datasheets in the future?

I'll start the list:
THD for high source impedances to characterize input impedance linearity
FFTs of the output distortion to show which harmonics are dominant
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Old 20th December 2014, 01:19 AM   #2
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The important part of this idea is the quantitative answer to the question "How much will it increase our sales, and how quickly?"
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Old 20th December 2014, 01:20 AM   #3
jcx is offline jcx  United States
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you could just pick from Groner's op amp distortion file
SG-Acoustics Samuel Groner IC OpAmps
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Old 25th December 2014, 11:21 PM   #4
AndrewT is offline AndrewT  Scotland
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if the opamp datasheets are too honest the result can be reduced sales.

A manufacturer like Analog show a lot more than many others because they are confident in the quality of their product compared to equivalents from their competitors.
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regards Andrew T.
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Old 26th December 2014, 05:16 AM   #5
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Quote:
Originally Posted by johnc124 View Post
. . . I'll start the list:
THD for high source impedances to characterize input impedance linearity
Quote:
Originally Posted by jcx View Post
you could just pick from Groner's op amp distortion file
SG-Acoustics Samuel Groner IC OpAmps
That's by far the best source of measured data. The last update is now several years old. I'd revise the wishlist entry to something like, "Somebody who has the motivation, access to necessary test equipment, and time, to continue Samuel Groner's work.".

Quote:
FFTs of the output distortion to show which harmonics are dominant
Occasionally (but not often) you see separate curves for second and third harmonics. See, for example, Figure 28 (page 13) in the THS6012 Data Sheet at http://www.ti.com/lit/ds/symlink/ths6012.pdf .

Dale
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