AD594 to 597 basic application circuit a

The relationship between AD594/595 output and temperature is:
    AD594: Vo=(Voj +16pLV) x193.4 (mV)
where: voJ is the output voltage of the J-type thermocouple .     AD595 : Vo     =
    (VOK +llIr,V) ) x180.57 (mV) where: voJ is the output voltage of type J thermocouple.   AD597: Vo=VOK x245.46 (mV) where: VOK is the output voltage of type K thermocouple.     ③ Pin HYS adjusts the input and output Hysteresis.     The basic application circuit of AD594~597 is shown in the figure.     In the AD594/595 circuit, the thermocouple is directly connected to lC. When using a single +5v power supply, it is very convenient to obtain vo=rxlOmV/C (r is the thermocouple The output of the temperature sensed by the couple), the temperature measurement range is O~+300qC; in the basic application circuit of AD 596/597 , a hysteresis adjustment element R1-ink, RPi and temperature alarm indicator LED are added, and RPi can be adjusted The hysteresis of the output voltage, for every 200 nA current increase in pin ③, the output will increase the temperature hysteresis of 1°C. The output voltage is vo=rx lOmV gate C (r is the temperature of the thermocouple ), and the temperature measurement range is O-300C , the accuracy is t0.020C (+25-+lOOoC).