Hi chaps,

i have an LM335 and an LM10 to scale the output of the LM335 from 2.4v at 0c
and 3.4v at 100c to 0v at 0c and 5v at 100c. There are some sugested
circuits out there -

http://cid-3938694af51801e0.photos.l...e/LM335AMP.PNG

problem is i am having trouble interpreting it to make sense to me...ie what
is the item to the right of the word sensor, is it a capacitor? if it is
what value is it and what pin on the LM10 does it go to?

also, the arrow pointing down with the number 4 on it, do i tie this to 0vdc
and to pin 4 on the LM10?

Thanks for the help chaps!

Steve

Mr Sandman wrote:

problem is i am having trouble interpreting it to make sense to me...ie
what is the item to the right of the word sensor, is it a capacitor? if
it is what value is it and what pin on the LM10 does it go to?

That's not a particularly good diagram. The item is a 0.2v voltage
source (it's a battery symbol.) It'd be the work of a minute to find the
pinout of the chip and identify the pin number it's feeding.

--
Scott

Where are we going and why am I in this handbasket?

http://www.emesystems.com/pdfs/parts/LM10.pdf

still having trouble figuring it out! And how do i work out how to get 0.2v
from the 5v i have handy?

steve

"Scott M" wrote in message
...
Mr Sandman wrote:

problem is i am having trouble interpreting it to make sense to me...ie
what is the item to the right of the word sensor, is it a capacitor? if
it is what value is it and what pin on the LM10 does it go to?

That's not a particularly good diagram. The item is a 0.2v voltage source
(it's a battery symbol.) It'd be the work of a minute to find the pinout
of the chip and identify the pin number it's feeding.

--
Scott

Where are we going and why am I in this handbasket?

On Sep 1, 6:40*pm, "Mr Sandman" wrote:
http://www.emesystems.com/pdfs/parts/LM10.pdf

still having trouble figuring it out! *And how do i work out how to get 0.2v
from the 5v i have handy?

steve

"Scott M" wrote in message

...

Mr Sandman wrote:

problem is i am having trouble interpreting it to make sense to me...ie
what is the item to the right of the word sensor, is it a capacitor? if
it is what value is it and what pin on the LM10 does it go to?

That's not a particularly good diagram. The item is a 0.2v voltage source
(it's a battery symbol.) It'd be the work of a minute to find the pinout
of the chip and identify the pin number it's feeding.


The 0.2v is best supplied by 2 resistors and a capacitor. +5v to
resistor to a 2nd resistor to ground. And a nice big capacitor from
the junction of the Rs to ground. Connect that junction to the +input
of the opamp. Looks like the author had an oops I forgot moment.

The 2 Rs forma voltage divider, so the 1st one needs to be 25x the R
value fo the 2nd one.

Which pin is the + input? google datasheet LM10


NT

On Sep 1, 6:52*pm, Tabby wrote:
On Sep 1, 6:40*pm, "Mr Sandman" wrote:



http://www.emesystems.com/pdfs/parts/LM10.pdf

still having trouble figuring it out! *And how do i work out how to get 0.2v
from the 5v i have handy?

steve

"Scott M" wrote in message

...

Mr Sandman wrote:

problem is i am having trouble interpreting it to make sense to me....ie
what is the item to the right of the word sensor, is it a capacitor? if
it is what value is it and what pin on the LM10 does it go to?

That's not a particularly good diagram. The item is a 0.2v voltage source
(it's a battery symbol.) It'd be the work of a minute to find the pinout
of the chip and identify the pin number it's feeding.

The 0.2v is best supplied by 2 resistors and a capacitor. +5v to
resistor to a 2nd resistor to ground. And a nice big capacitor from
the junction of the Rs to ground. Connect that junction to the +input
of the opamp. Looks like the author had an oops I forgot moment.

The 2 Rs forma voltage divider, so the 1st one needs to be 25x the R
value fo the 2nd one.

24x

MBQ

In article ,
"Mr Sandman" writes:
Hi chaps,

i have an LM335 and an LM10 to scale the output of the LM335 from 2.4v at 0c
and 3.4v at 100c to 0v at 0c and 5v at 100c. There are some sugested
circuits out there -

http://cid-3938694af51801e0.photos.l...e/LM335AMP.PNG

problem is i am having trouble interpreting it to make sense to me...ie what
is the item to the right of the word sensor, is it a capacitor? if it is
what value is it and what pin on the LM10 does it go to?

It's a .2V voltage reference - in effect, it's a 0.2V battery.
It's built in to the chip, which is why there's no pin number.
The circuit is relying on the known drift of this reference
voltage with temperature. (The data sheet I looked at only has
it linear up to about 85C, not 100C.)

also, the arrow pointing down with the number 4 on it, do i tie this to 0vdc
and to pin 4 on the LM10?

Yes.

Thanks for the help chaps!

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Sep 1, 6:49*pm, (Andrew Gabriel) wrote:
In article ,
* * * * "Mr Sandman" writes:

Hi chaps,

i have an LM335 and an LM10 to scale the output of the LM335 from 2.4v at 0c
and 3.4v at 100c to 0v at 0c and 5v at 100c. *There are some sugested
circuits out there -

http://cid-3938694af51801e0.photos.l...utchforce/LM33...

problem is i am having trouble interpreting it to make sense to me...ie what
is the item to the right of the word sensor, is it a capacitor? if it is
what value is it and what pin on the LM10 does it go to?

It's a .2V voltage reference - in effect, it's a 0.2V battery.
It's built in to the chip, which is why there's no pin number.
The circuit is relying on the known drift of this reference
voltage with temperature. (The data sheet I looked at only has
it linear up to about 85C, not 100C.)

also, the arrow pointing down with the number 4 on it, do i tie this to 0vdc
and to pin 4 on the LM10?

Yes.

Thanks for the help chaps!

Makes more sense


NT

"Andrew Gabriel" wrote in message
...
In article ,
"Mr Sandman" writes:
Hi chaps,

i have an LM335 and an LM10 to scale the output of the LM335 from 2.4v at
0c
and 3.4v at 100c to 0v at 0c and 5v at 100c. There are some sugested
circuits out there -

http://cid-3938694af51801e0.photos.l...e/LM335AMP.PNG

problem is i am having trouble interpreting it to make sense to me...ie
what
is the item to the right of the word sensor, is it a capacitor? if it is
what value is it and what pin on the LM10 does it go to?

It's a .2V voltage reference - in effect, it's a 0.2V battery.
It's built in to the chip, which is why there's no pin number.
The circuit is relying on the known drift of this reference
voltage with temperature. (The data sheet I looked at only has
it linear up to about 85C, not 100C.)

also, the arrow pointing down with the number 4 on it, do i tie this to
0vdc
and to pin 4 on the LM10?

Yes.

Thanks for the help chaps!

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

oooooooooookkkkkkkkk.............so do i just ignore the battery bit then as
its built in?

Tar!

Steve