I am using ADS1241 to measure Thermocouple millivolts. How can I measure negative thermocouple millivolts with ADS1241. Can I connect negative voltage to VREF- (-0.23V) .
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I am using ADS1241 to measure Thermocouple millivolts. How can I measure negative thermocouple millivolts with ADS1241. Can I connect negative voltage to VREF- (-0.23V) .
Hi Akash,
Can you provide additional information regarding what exactly is being applied to the inputs?
What gain setting is being used?
Please see the Full-Scale Range (FSR) section on page 22 of the datasheet.
The count will never be truly stable due to noise saturating the least significant bits - there will always be a slight variation.
Hi Alex,
I have applied millivolts differentially to channel AIN4 and AIN5 using a stable and accurate millivolt source. The Thermocouple Millivolts range from -8.9 mV to 70 mV. I want to cover the whole millivolt range using this ADC.
I have set the PGA to 1.
How can I measure the negative millivolts?
I applied -10mV to the input and getting counts FF47D3 in hex. The reference is 1.235V and the format is bipolar. I am not able to decode these ADC counts.