Part Number:ADS1018-Q1
Tool/software:TINA-TI or Spice Models
Hi ,
Thank you very much for your support so far. We are working on one requirement as below.
We have used ADS1118 for interfacing thermocouple K - Type. Our measuring range is 0 to 300°C. Electronics will be exposed to 0 to 75°C operating ambient.
We are predicting error budget for this block. Circuit is attached for reference.
In circuit 2 x 1M resistors are at pull up and pull down. Two resisotr of 499 ohm for low pass filter.
Now considering tolerances and PPMs for resistors how we can we calculate deviation of Thermonuclear voltage till ADC input ? Can we simulate this in TINA.
Can you me pl. suggest on calculations to predict how resistors will impact on thermocouple mV o/p to ADC I/P? These are passive components errors.
Now what is internal reference value for this chip? I am not able to find this in data sheet.
I would like to predict ADC counts based upon input voltage at ADC i/p.
If due to resistors tolerances thermocouple mV deviates ,w e need to predict this . Pl. guide on this.
Can you pl. help on this ?
Regards,
Amod
(Please visit the site to view this file)