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Fast but small optocouplers?

J

Joerg

Jan 1, 1970
0
Tim said:
Weird, I had found the PC457L0NIT0F, which has the exact same datasheet,
which is the -P0F, not -T0F.

Digikey has 23k and change of the -NIP0F, and 58k and change of
the -YIP0F, which is VDE marked. Again, same datasheet and link.

Now I want to know what the hell is the difference! Nothing about part
numbering in the datasheet. Sharp's website isn't helpful; datasheet
specifies "corresponding Optoelectronic Application Notes", but there are
none listed under this product type. And their listing shows the
45*6*L0NIP0F, but only the 457 -YIP0F.

The one with VDE papers is around a cent or so more but in some apps you
need those papers on file. BT.

TOF was probably a typo and they haven't cleaned it out at Digikey.
 
J

Joerg

Jan 1, 1970
0
John said:
Could you send your signal FM instead of PWM?

Sure, anything, the protocol doesn't matter. Physical circuit size does
matter.
 
T

Tim Williams

Jan 1, 1970
0
John Larkin said:
Doncha just hate a data sheet that covers several different parts
without saying what's different about them?

Doncha hate it more when it covers them, but it's wrong? We found that on
a Schaffner line filter. Datasheet listed options for termination (lugs,
posts, etc.), so we bought the different style, doesn't fit -- mounting
holes in the wrong place. No drawing exists of this footprint variant.
Go figure.

Tim
 
T

Tim Williams

Jan 1, 1970
0
John Larkin said:
Could you send your signal FM instead of PWM?

Or just DC, without the PWM?

Those dual photodiode couplers are pretty accurate, but they generally
need to be trimmed on assembly to get the gain right.

Tim
 
G

George Herold

Jan 1, 1970
0
John said:
On Sat, 1 Sep 2012 21:21:37 -0500, "Tim Williams"
This is pretty good:

Great! Yesterday we had a bottle of the end of the world, "Fin du
Monde", this stuff but the big Belgian style bottle:

http://en.wikipedia.org/wiki/La_Fin_du_Monde_(beer)

[...]

--
Regards, Joerg

http://www.analogconsultants.com/- Hide quoted text -

- Show quoted text -

Ohh, that's almost local to Buf., NY. I like their "trois pistoles".
Belgain style abbey ale...

George H.
 
T

Tim Williams

Jan 1, 1970
0
Michael A. Terrell said:
I want to use them in a PWM temperature controller for multiple
soldering irons, with an Atmel Mega series processor. The irons have
thermisors, so I will use the A/D to sense the temperature, and set the
PWM to compensate. A 20*4 LCD to display setup & current temperature for
each of several irons. A 15A 24V switcher will power everything.

Or you could buy a Hakko multi station ;-)

$$$, but few ameteurs have more than three hands to use at a time, not
sure what else you'd be using all them for!

Tim
 
Or you could buy a Hakko multi station ;-)

$$$, but few ameteurs have more than three hands to use at a time, not
sure what else you'd be using all them for!

I have two Metcals at the station I share, each with two iron (two irons,
tweezers, and a sucker). Each of the two Metcals has two ports, unfortunately
only one is active at a time. I'm always waiting for an iron to heat. I
should get another controller (I don't use the sucker much).
 
F

Fred Abse

Jan 1, 1970
0
Great! Yesterday we had a bottle of the end of the world, "Fin du Monde",
this stuff but the big Belgian style bottle:

Belgium *is* the end of the world ;-)
 
S

spamtrap1888

Jan 1, 1970
0
But it's brewed in Canada :)

You have to go to Russian River Bwg in Santa Rosa and taste their
Belgian-style wild fermented beers. They are spot-on and delicious.
 
J

Joerg

Jan 1, 1970
0
John said:
Opposite end of the world.

Don't say that when Phil is listening ...

But seriously, Fin du Monde is very good stuff. Has nine volts, so one
should not have to drive afterwards.
 
N

Nico Coesel

Jan 1, 1970
0
Joerg said:
Thanks, Nico. That's a pretty good one. Best of all, it does not need a
logic supply but can take up to 20V. A bit hungry at 3mA but that would
nicely fit the 10V I've got there.

If you look at Toshiba's website you'll see they have even smaller
ones but the specs for those say nothing about speed. Only that they
can be used for driving MOSTFETs.
 
F

Fred Abse

Jan 1, 1970
0
J

Joerg

Jan 1, 1970
0
Fred said:
I've always liked Tosh optos.

Do you know how they are WRT longterm availability? Production time
frames more like two or three decade. With HP ... Avago that was never a
problem but they don't have anything suitable for this app.

TLP2366:

Rise & fall time typ. 15ns @ Vf 0-14mA

3.7 x 4.5mm

http://www.semicon.toshiba.co.jp/info/docget.jsp?type=datasheet&lang=en&pid=TLP2366

It's an "IC output" type, needing Vcc of 2.7 to 5.5V on the output side, so you
mighn't like it.

It's a good device, inverts which is nice, but I only have around 10V
and no space. I could also siphon off 1.5V or so somewhere on the RX
side but it won't run with that. They also recommend to give it north of
4.5mA on the LED which really is a bit much.
 
F

Fred Abse

Jan 1, 1970
0
Do you know how they are WRT longterm availability? Production time
frames more like two or three decade.

I've been using TLP550s for north of 20 years. They still make those.

I notice that there's an EOL notice on TLP621, but their suggested "almost
equivalent will do what I want.

IME, the reliability of Tosh optos is better than their HP/Agilent
comparables.
 
J

Joerg

Jan 1, 1970
0
Fred said:
I've been using TLP550s for north of 20 years. They still make those.

I notice that there's an EOL notice on TLP621, but their suggested "almost
equivalent will do what I want.

IME, the reliability of Tosh optos is better than their HP/Agilent
comparables.

That's good to know, Fred, thanks. I guess I'll use a Toshiba opto then.
 
R

rickman

Jan 1, 1970
0
Doncha just hate a data sheet that covers several different parts
without saying what's different about them?

As long as you've opened the data sheet gripe door, the other day I was
looking for LCD capable MCUs and Freescale has a line of nice ones.
Trouble is they put out a data book for each *package* variant! The LCD
controller has access to fewer or more pins depending on the package.
Ok, so I have to look in three data books to find which one will meet my
needs... everywhere I find a reference to the number of LCD pins
supported, the footnote refers me to the pin out section. In the pinout
section they refer me to... the pinout section! I guess the info is in
the pin list if I want to track down and count some 40+ signals in the
multiplexed IO lists.

I write to Freescale support and they seem to have moved to the other
half of the world. Every reply takes a full day, often sent in the wee
hours of the morning and clearly shows they don't understand my
question. After four attempts to get them to find me the info of LCD
pins vs. package I get the counts I asked for. Finally I got them to
understand they might want to add this to the data sheets rather than
expect the user to wade through the pinout lists.

Does it really save Freescale money to move support to a third world
country if they spend four times as much effort answering a question? I
won't even try to understand why they publish a separate data book for
every package of a part.

Rick
 
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