A temperature sensor produces an output voltage of 5mV/°C. It is required that this voltage is increased in order to be applied to the analogue input of a microcontroller that has a reference voltage of 3.3V. a) Design a suitable amplification stage in order to use the maximum range of the microcontrollers analogue input given that the maximum temperature to be measured is 50°C. b) Explain what is meant by the terms: input offset voltage and slew
A temperature sensor produces an output voltage of 5mV/°C. It is required that this voltage is increased in order to be applied to the analogue input of a microcontroller that has a reference voltage of 3.3V. a) Design a suitable amplification stage in order to use the maximum range of the microcontrollers analogue input given that the maximum temperature to be measured is 50°C. b) Explain what is meant by the terms: input offset voltage and slew
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Transcribed Image Text:Q1.
A temperature sensor produces an output voltage of 5mV/°C. It is
required that this voltage is increased in order to be applied to the
analogue input of a microcontroller that has a reference voltage of 3.3V.
a) Design a suitable amplification stage in order to use the maximum
range of the microcontrollers analogue input given that the
maximum temperature to be measured is 50°C.
b) Explain what is meant by the terms: input offset voltage and slew
rate with reference to opamps.
c) The figure below presents the frequency response
an opamp.
Determine the gain-bandwidth-product of the opamp and explain
its significance to the performance of the device.
110
Vcc+ = 15 V
Vcc-=-15 V
Vo = 10 V
RL = 2 kQ
TA = 25°C
100
90
80
70
60
Gain dB
50
40
30
20
10
-10
1
10
100
1k
10k
100k
1M
10M
Frequency Hz
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