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Who was looking for NE5534 PSRR?
Who was looking for NE5534 PSRR?
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Old 7th December 2017, 06:32 PM   #1
jackinnj is online now jackinnj  United States
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Who was looking for NE5534 PSRR?
Default Who was looking for NE5534 PSRR?

I ran this today.
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Old 7th December 2017, 06:40 PM   #2
gpapag is offline gpapag  Greece
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Who was looking for NE5534 PSRR?
Thanks. At what gain (G)?

George
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Old 7th December 2017, 06:48 PM   #3
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Me? op-amp based, high-gain, high rail voltage, preamp
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Old 7th December 2017, 06:48 PM   #4
jackinnj is online now jackinnj  United States
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Who was looking for NE5534 PSRR?
Unity gain
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Old 7th December 2017, 07:07 PM   #5
gpapag is offline gpapag  Greece
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Who was looking for NE5534 PSRR?
Looks good.
Have you noticed any difference with power pins decoupling and Rload change?

George
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Old 8th December 2017, 09:50 AM   #6
AndrewT is offline AndrewT  Scotland
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Originally Posted by jackinnj View Post
I ran this today.
~-50dB for both +ve & -ve @ 100kHz is quite good.
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Old 8th December 2017, 09:52 AM   #7
AndrewT is offline AndrewT  Scotland
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Originally Posted by gpapag View Post
Looks good.
Have you noticed any difference with power pins decoupling and Rload change?

George
Does PSRR get better with the recommended local decoupling added?

I would have expected the chip to be tested to give the best results and that would be with the local decoupling already in place.
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Old 8th December 2017, 10:10 AM   #8
traderbam is offline traderbam  Europe
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Yes those plots look good. Both because the rejection is high and because it is similar for each rail.

Which manufacturer's 5534 is this?

I didn't expect the rails to measure so closely after I had a quick look at the schematic. I'll need to study it more closely. This arose in that other thread to do with bootstrapping the output to the power rails, which has complicated stability implications.
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Last edited by traderbam; 8th December 2017 at 10:15 AM. Reason: Sorry, got my numbers mixed up...5534
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Old 8th December 2017, 10:13 AM   #9
AndrewT is offline AndrewT  Scotland
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Yes those plots look good. Both because the rejection is high and because it is similar for each rail.

Which manufacturer's 5532 is this?

I didn't expect the rails to measure so closely...........
it's a 5534, the 5532 is arranged a bit differently.
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Old 8th December 2017, 10:14 AM   #10
AndrewT is offline AndrewT  Scotland
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Jack,
was your test with, or without local decoupling?
And what sizes/locations?
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