LM4562 - any good

[fmak]

Anyone with experience of using the new LM4562 as

1. I/V
2. Post I/V filter/summing amp😎

 

[fastcat95]

Hello:

I have used the single version of the 4562 in the
post I/V output op-amp position. I used to have
the OPA627 in this position. The new units strike
me as less dark, a bit more transparent, and having
a bit better clarity & definition. Also seem to sound
a bit more "live". A bargain compared to the 627.

Fastcat95

P.S. I had a 3 ma output bias on my 627 op-amps
with very low impedance 100 uF electros &
.01 uF film bypasses on the power pins.

 

[fmak]

Hello:

I have used the single version of the 4562 in the
post I/V output op-amp position. I used to have
the OPA627 in this position. The new units strike
me as less dark, a bit more transparent, and having
a bit better clarity & definition. Also seem to sound
a bit more "live". A bargain compared to the 627.

Fastcat95

P.S. I had a 3 ma output bias on my 627 op-amps
with very low impedance 100 uF electros &
.01 uF film bypasses on the power pins.

I have never liked the OPA627 biased or not - I've removede many!. The LM6171/71, suitably bypassed (.1 u NPO across V+-) is good, as is AD852. I'll try the 4562

 

[foo]

LM4562 is a very good Audio OP no matter for money or performance. It's almost as good as OPA627BM.
However, I would like to use OPA627BM as I/V for performance.
If you need high output swing, LM4562 might not be ideal as well.

 

[jackinnj]

Just thought I would bump this with some data -- 200mV into a 20dB gain amp -- there is a little bit of compensation (75pF) across the feedback resistor (6.81k) -- load is 600 ohms -- the effect of various rail voltages is demonstrated as i am going to use it in a single-supply application:

An externally hosted image should be here but it was not working when we last tested it.

 

[leadbelly]

What's the plot of, THD?

 

[jackinnj]

Yes, I should have labeled the axes.

I am going to do it again with the test setup which National shows in the product folder.

 

[jackinnj]

Well, I ran the test with the test-jig from figure 1 -- so divide the measured distortion by 101 --

An externally hosted image should be here but it was not working when we last tested it.

 

[jackinnj]

What's the plot of, THD?

by the way, speaking of fried chicken -- did you see the last episode of "Family Guy"? Sneaking fried chicken into the CIA offices at Langley now that transfats have been banned.