Order samples and learn more about the op amp used in this video
https://www.ti.com/product/TLV9001?HQS=asc-amps-gpamps-amps_product_tlv9001
This temperature sensing circuit uses a resistor in series with a
negative–temperature–coefficient (NTC) thermistor to form a voltage
divider, which has the effect of producing an output voltage that is linear
over temperature. The circuit uses an op amp in a non–inverting
configuration with inverting reference to offset and gain the signal, which
helps to utilize the full ADC resolution and increase measurement accuracy.
View our portfolio of operational amplifiers
https://www.ti.com/amplifier-circuit/op-amps/overview.html?HQS=asc-amps-gpamps-amps_GPAMPS_overview
Learn more about analog signal chain in our online classroom, TI Precision Labs
https://training.ti.com/ti-precision-labs-overview?HQS=asc-amps-gpamps-amps_GPAMPS_tipl
Evaluate and prototype with amplifiers using TI’s DIYAMP-EVM
https://www.ti.com/tool/DIYAMP-EVM?HQS=asc-amps-gpamps-amps_GPAMPS_diyamp_evm
Learn more about the circuit from this video
https://www.ti.com/tool/CIRCUIT060002?HQS=asc-amps-gpamps-amps_circuit_600002
, https://i.ytimg.com/vi/by37HiEWEYk/hqdefault.jpg
source
I didn't get the sqrt of NTC to calculate R1. What is the relationship?
R1 = sqrt(2.252k x 819.7) = 1.359k
The calculation of R1 is wrong, when I do addition inside the root, I got R1 as 55.346 ohm. but in TI's circuit note, the R1 calculation is multiplication inside the square root. That time R1 is same as in the video. the document link is given below https://www.ti.com/lit/an/sboa323/sboa323.pdf?ts=1613541925432&ref_url=https%253A%252F%252Fwww.google.com%252F
blah blah blah blah…… struggling to get this
how do you get the formula for R1? what steps have you taken for R1 formula?
how can we find the minimum detectable temperature difference in NTC thermistor sensor? appreciate it.
Many many Thanks
sorry but what number of part are you using for NTC value ?
Slight error in the calculation of R1. The value is correct but the equation should be the geometric mean but has an addition symbol instead.