TLE2072 output current and driving capability?

[xefe]

Hi!

I can't find any information whether the new TLE2072 is better at driving loads that the ancient TL072. Do the TLE2072 have the 2kohm limitation?
I got a bunch of TLE2072 sitting here waiting to be used...

I can't seem to find the Ios parameter for the TL072 anywhere.

Thanks!

 

[s2udio]

I think we already covered this at the other place !
But again
You are overthinking this ...Try one socketed in your application ?
And as you have not defined the application ?
They are definitely lower noise,with a faster slew rate
In all TL072 Audio applications I have used them to replace,
They are chip for chip compatible,
The TLE2072 is far from "New"

As a fellow member pointed out
The Data sheet refers to a 600 ohm load .........

 

[PRR]

> better at driving loads

Is this even worth our valuable time?? If one 21-cent amp *may* not be enough, save-up and use *two* amps (with appropriate resistors).

> I can't find any information

Yeah, it would be nice if chip-makers published DATA sheets for their parts.

Wait, I think I saw some hidden-away in Google. On TI's own website, strangely.
http://www.ti.com/lit/ds/symlink/tl071a.pdf
http://www.ti.com/lit/ds/symlink/tle2072.pdf

Ah, I see. The ancient antique TL07x sheet does not show voltage versus current, but voltage versus resistance. How could we possibly convert from resistance to current? Some secret formula?

Below left I've marked-up the TL07x data with voltage and current values.

Below right I've plotted the TL07x data onto the TLE270x data. Along with some typical load impedances.

For all "reasonable" loads, the TLE has significantly more beef than the TL0.

Is this even worth our valuable time??

Look at the prices:

TL072 $0.35 (2 units, so $0.18/each)
TLE2072 $1.20 (2 units, so $0.60/each)

TLE is somewhat better output drive, but generally not "twice", yet is 3 times the price. If voltage and current are your only goals, strapping four units of TL074 beats one unit of TLE2072 at lower chip cost.

Though either way, board-cost and assembly labor probably make more difference than the chip. And case and knobs and logo-badge always dominate the total product price.

 

[audiomixer]

Hi PRR,

now that's a thorough analysis.... I did open the datasheet quickly and wanted to answer, but refrained.... not really worth my time ;-). good we have some on board (pun intended) that have the verve to go into the details. I hope th OP appreciates.

- Michael

 

[PRR]

> that's a thorough analysis....

No.

I omitted the part about the TL072's bogus graph. It shows peak output voltage of ZERO at 100 Ohm load. The drafts-person didn't understand lin-log graphing, nor understand that the chip is not smart enough to know a 100-Ohm load when it sees one.

I don't know if TI thought this unusual form of presenting the data was more useful, or if the marketing dept was trying to mask the fact that the TL072's output is less-strong than many competing chips.

 

[xefe]

much appreciation