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university:courses:electronics:electronics-lab-window-comp-tmp01 [07 Mar 2018 13:14]
Antoniu Miclaus
university:courses:electronics:electronics-lab-window-comp-tmp01 [09 Mar 2018 10:43]
Antoniu Miclaus add first TMP01 task
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 R<​sub>​3</​sub>​ (in kΩ) = V<​sub>​SETLOW</​sub>/​I<​sub>​VREF</​sub>​ R<​sub>​3</​sub>​ (in kΩ) = V<​sub>​SETLOW</​sub>/​I<​sub>​VREF</​sub>​
  
-The total R<​sub>​1<​sub>​ + R<​sub>​2</​sub>​ + R<​sub>​3</​sub>​ is equal to the load resistance needed to draw the desired hysteresis current from the reference, or I<​sub>​VREF</​sub>​.+The total R<​sub>​1<​/sub> + R<​sub>​2</​sub>​ + R<​sub>​3</​sub>​ is equal to the load resistance needed to draw the desired hysteresis current from the reference, or I<​sub>​VREF</​sub>​.
  
 I<​sub>​VREF</​sub>​ = 2.5/( R<​sub>​1</​sub>​ + R<​sub>​2</​sub>​ + R<​sub>​3</​sub>​) I<​sub>​VREF</​sub>​ = 2.5/( R<​sub>​1</​sub>​ + R<​sub>​2</​sub>​ + R<​sub>​3</​sub>​)
 +
 +Since VREF = 2.5 V, with a reference load resistance of 357 kΩ or greater (output current 7 μA or less), the temperature setpoint hysteresis is zero degrees. Larger values of load resistance only decrease the output current below 7 μA and have no effect on the operation of the device. The amount of hysteresis is determined by selecting a value of load resistance for VREF. 
 +
 +==== Tasks ====
 +
 +1. Build the following circuit:
 +
 +<WRAP centeralign>​{{:​university:​courses:​electronics:​tmp01-bb1.png|}}</​WRAP>​
 +
 +<WRAP centeralign>​ Figure 5 Temperature Measurement </​WRAP>​
 +
 +Measure VPTAT output value and compute the actual measured temperature in degrees Kelvin and degrees Celsius.
 +
  
university/courses/electronics/electronics-lab-window-comp-tmp01.txt · Last modified: 03 Jan 2021 22:21 by Robin Getz