8-channel temperature detection circuit

The 8-channel temperature detection circuit shown
can detect 8-channel temperature
.
    ． {D581 is a 10. OOV precision reference voltage
source, which provides a precise reference voltage for the detection circuit
. Shu, RPi, RP2, R4, and AD590L
are one of the detection circuits (the other seven detection circuits are exactly the same). RPi and RP2 are respectively Adjust the high-end and low-end temperatures
; the electrical signal output by AD590L is selected by the 8-way 1-select electronic switch IC 2 and sent to the operational amplifier IC3 for amplification
. The output of IC3 is 100mV/cC.
    IC2 inputs binary data (ooo-111) through the C, B, and A terminals to select one of the 8 input signals as the output
. IC 3 is a typical instrumentation operational amplifier with a common-mode rejection of 140 dB and an open-loop gain of 13 V/p,V.