Precision voltage reference

[unprintable]

Hi!

I am trying to build a precision voltage reference without the LM399 or even the LTZ1000.
So i have made up a design and as i am quit a beginner i wanted someone to take a look at it, if all make sense and if i am getting a high precision and stability.
The VCC might be around 9VDC and the reference output should be around 3.3V.
The L1 is a 10uH inductor.

Really appreciate feedback and any help!


Thanks in advance!
Regards,
Alex

[BFX]

Do you know this useful feature? (see img) You should definitely try it 

[unprintable]

Hi!

As you might have read my initial sentence, i dont want to use these components as i want to find a different way to achieve a stable and precise voltage reference.


Thanks.
Regards,
Alex

[Gyro]

Sadly, we are sometimes afflicted by members who are unable to read past the middle of the first sentence 

If you're looking for something different, then you might want to try your hand at Alex's JFET reference...

https://www.eevblog.com/forum/metrology/building-your-own-voltage-reference-the-jvr/

[blackdog]

Hi Alex 

It helps if you first tell what kind of reference you want to make.
Different is not so useful to us to be able to help you.

So which output voltage do you need?
How much mA will the load be.
At what supply voltage should the reference do its work?
Over which temperature range should it be within how much PPM are stable.

When I look at your schematic I get a bit dizzy, but I noticed one thing.
Did you load the Opamp LTC2057 with 22nF! opamps should never be loaded directly with capacitors.
And yes, there are some exceptions, but not important here.

I would like to hear from you what your goals are.

Kind regards,
Bram

[unprintable]

Hi!

Ok here we go... 

- The exact voltage does not really matter, my primary target is a stable reference voltage
- It's only purpose is for measuring and serving as a ref, so no "real" load will be attached to it
- Supply range will be controlled by ADP7104ARDZ so it could handle max. 20V
- Yea... PPM. The lower the better but i think (and hope ) it will be around 10 to max. 25 PPM...?


Thanks for your help!
Regards,
Alex

[blackdog]

OK

Some good chips.

10V
LT1021BCN8-10#PBF
AD587KNZ


5V
LT1027BCN8-5#PBF
LT1021BMH-5
MAX6350CPA

And the LT1236, LTC6655 in LS8 housings

Kind regards.
Bram