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A temperature in the range of −40°C to 55°C is to be measured with a resolution of 0.1°C. The minimum number of ADC bits required to get a matching dynamic range of the temperature sensor is
- 8
- 10
- 12
- 14
Correct answer: 10
Solution
Range = 55-(-40) = 95 C; at 0.1 C resolution that is 950 levels. 2^9=512 is too few, 2^10=1024 suffices, so 10 bits are required. Stored answer 12 is more than needed.
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