TLE2024 precision temperature measurement circuit

IIE2024 is a very excellent quad high-speed operational amplifier , integrating 4 identical operational amplifiers inside.
TLE2024 has low temperature drift, low bias input current
(<50nA), voltage offset less than ioo rlr,V,
low noise (19nV/H, ​​typical), high conversion speed,
unity gain bandwidth (2Mffi), open-loop gain Large
(6. 5V/pV, 136dB) characteristics. In addition,
two power supply working modes of +5v and ±15V are specially set up
. TLE2024 precision temperature measurement circuit is shown in Figure 1-4
.
    The temperature measurement resolution of this circuit is 0. 10'C, and the temperature measurement
range is - 50 to +150'C. IC1 is a precision reference
voltage source, providing -1.2V reference voltage to Al and A2
. Al is the reference voltage amplification, and A2 is the signal amplification
. The gain of the amplifier is determined by RT/R6. When the resistance of RT changes with the temperature, the gain also changes and the output
voltage changes. The amount of change is corrected by the wind and RPi. Amplifier A3 further amplifies and outputs a voltage of -5 to +10V.