Question

3. (a) What is the difference between the signal measurement methods in differential mode' vs 'single ended measurement"? (b). A 14 bit A to D converter is to be employed with an Iron-constantan thermocouple. What temperature resolution can be expected with a full scale voltage of 100 mV? Thermocouple shows 0.5 mV at 50°C and 3.052 mV at 100°C.

Answer 1

it has no is takem the two heires the measurement is his added to both con then be a:* A differential Noltage footing meaning that reference to mees Wement Voltage difference ble the main Obenefit of a a diffenential noise rejection because the noise heires filtered out by the mode rejection of the data data Jacquotion System Single ended measurement is taken ao the vol voltage dikti blw and ground. the only the positive weire, an measued along hoith the old and Common а wise Bround the noise а result 1 shu voltage from the Sen son A sensor neith a diff: olp can be heired for Side sig single ended by neiring the low to the ground this i notally, dene to reduce the needed to measure the Sensor hD. of channel bib Given B = 14 bit at 50° C = 0.5 mv 100°C 3.052 mu loomy full scale Noltage °C outpul. oul pul voltage 3.052 -0.5 100 50

0.05 mulie scale voltage So, the 11 Inn mo 6oloxio 3 mv 2 14 L X 0.05 6.10 x 10-3 2 6010X10-3 0.05 2 = Do 22 °C ✓ = 0.122°C Ans