NRND lifecycle — what it means for procurement
For sustainment programs already using the LM35DT in a BOM position, the NRND status is manageable: the part is still orderable through authorized distribution and independent channels. New designs should evaluate the current-generation LM35 family alternatives.
10 mV/°C output — what the scale factor means on the bench
The LM35DT delivers an analog output of 10 mV per degree Celsius, with no external calibration required. At 25°C the output reads 250 mV; at 100°C it reads 1.0 V. The scale factor is linear across the rated 0°C to 100°C range. Accuracy is specified at ±1.5°C at 25°C, which translates to ±15 mV on the output. For a system ADC with a 10-bit resolution at a 1.024 V reference, the quantization step is 1 mV — the sensor's noise floor, not the ADC, sets the measurement uncertainty.
Supply range and package — board-fit constraints
The LM35DT operates from a 4 V to 30 V supply, drawing less than 60 µA from the rail. The metal tab is internally connected to the ground pin — if bolted to a heatsink, the heatsink becomes ground, so isolation is needed in non-isolated systems.