Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

16 Channel PT1000 readout breakout card with adjustable again and offset

joniengr

Advanced Member level 1
Joined
Nov 3, 2018
Messages
440
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
3,877
Hi, I am looking for 16 channel readout breakout card for PT 1000 with analog output on which I can change the gain and offset on each channel by replacing the resistor on the PCB. The analog output signal I am planning to connect to Microcontroller.
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
23,016
Helped
4,715
Reputation
9,446
Reaction score
5,087
Trophy points
1,393
Activity points
152,497
Hi,

in the past 25 years of electronic design I never replaced resistors to adjust gain or offset.
I mean, it´s a valid way.
But I found it more convenient, faster, accurate and cost effective to do the same on the digital (software) side.

Klaus
 

danadakk

Advanced Member level 5
Joined
Mar 26, 2018
Messages
2,203
Helped
343
Reputation
704
Reaction score
509
Trophy points
113
Activity points
9,756
Maybe something like this in a PSOC -

1669985265949.png


Single chip solution.


Regards, Dana.
 

joniengr

Advanced Member level 1
Joined
Nov 3, 2018
Messages
440
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
3,877
Alright, then how about 16 channel PT1000 readout card with analog outputs for each channel ?

I already have a Microcontroller based DAQ setup with software that can accept 16 analog inputs. I am looking for 16 channel PT1000 readout card with analog outputs.
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
23,016
Helped
4,715
Reputation
9,446
Reaction score
5,087
Trophy points
1,393
Activity points
152,497
Hi,

If you want it simple: just use a stable and accurate power supply / reference voltage and use an accurate pullup resistor (1k Ohms) for each PT1000.
That´s basically all you need.

We don´t know
* what temperature range you are interested in
* what sampling rate (or signal bandwidth) you need
* what accuracy, precision and resolution you need
* your mathematical and software skills

When converting analog signals to digital ones I always recommend to use a cutoff filter. In your case a simple capacitor would do. For sure it´s value depends on your application requirements.

Klaus
 

LaTeX Commands Quick-Menu:

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top