Texas Instruments LM35DZ/NOPB TO-92 Temperature Sensor - 卤1.5掳C Accuracy

The LM35DZ provides a linear analog voltage output of 10 millivolts per degree Celsius. To interface it, connect the V+ pin to a 4V to 30V supply, GND to ground, and the Vout pin directly to an ADC input on your microcontroller (e.g., Arduino, Raspberry Pi). No external signal conditioning is required, but a simple RC filter on the output can help reduce noise.

The LM35 is an analog sensor with a voltage output proportional to temperature, requiring an ADC on the host microcontroller. The DS18B20 is a digital sensor that communicates over a 1-Wire bus, providing a direct digital reading and allowing multiple sensors on a single pin. The LM35 offers simpler wiring and faster readouts for single-point measurements, while the DS18B20 is better for distributed sensing networks.

Yes, the LM35DZ can accurately measure temperatures as low as -55掳C. For negative temperatures, the output voltage will be negative relative to ground. To read this with a single-supply microcontroller ADC, you must provide a virtual ground or bias the output signal into the ADC's positive input range, as detailed in the TI application notes.

The LM35DZ typically draws less than 60 microamperes from its supply, resulting in extremely low self-heating of less than 0.1掳C in still air. This minimal power dissipation ensures the sensor does not significantly affect the temperature of the object or environment it is measuring, leading to higher accuracy in sensitive applications.