Temperature | Output Voltage | Supply | |||
---|---|---|---|---|---|
TMin | TMax | VoutMin | VoutMax | Vdd | Vee |
25°C | 50°C | 0.05 V | 3.25 V | 3.3 V | 0 V |
This temperature sensing circuit uses a resistor in series with a negative–temperature–coefficient (NTC) thermistor to form a voltage divider, which has the effect of producing an output voltage that is linear over temperature. The circuit uses an op amp in a non–inverting configuration with inverting reference to offset and gain the signal, which helps to utilize the full ADC resolution and increase measurement accuracy.