07-28-2014 10:55 AM
Hello Community,
iam actually playing / testing a controlling unit for pt100 with a current sink and high side measuring with an instrument op amp.
For compensating the gained offset voltage i tryd a typical circuit from the LTC1047 datasheet.
In DS:
http://www.datasheets.pl/integrated_circuits/L/LTC/LTC1047.pdf
First Picture Circuit, wont run. Output Voltage is everytime on posivite rail.
Then i took a look in component properties from LTC1043, and in the model tab, there's only a DUMMY model.
I also was wondering before, i used the LT1101, and tried some chopping with the ltc1043 but i wont works. So i done it with analog switches and a following active 2pole. But the circuit in the LTC1047 looks cheaper ;))
Is there any complete model available?
Thank u for your help.
Greetz
07-29-2014 03:16 AM
Dear Greetz,
It is not so trivial to simulate a pt100 or a thermistor in Multisim but here are some Links where you can find some instructions.
How do I Simulate a Pt100 RTD with Multisim?
Can I simulate an NTC thermistor with the RESISTOR_VIRTUAL component in Multisim?
Kind Regards,
SG3 | Applications Engineering | National Instruments | NIG |
07-29-2014 05:16 AM
Hello SG3,
thank you for your response. But thats not exactly what i asked. But also interesting, i will read it later.
I need a runable model for the LTC1043.
I use MS13.
There is a model of the LTC1043, but i explained it, in the component properties, there is only a "Dummy" model deposited.
Thank you.
07-29-2014 05:40 AM - edited 07-29-2014 05:40 AM
Dear Greetz,
Im very sorry but when there is only a "Dummy" Model included for this component we don’t have any model for this.
You have to contact the vendor of the LTC1043 you want to simulate and ask them for a SPICE Model which you could include in the component to simulate it.
Kind Regards,
SG3| Applications Engineering | National Instruments | NIG |