LM35DZ/NOPB Precision Temperature Sensor, TO-92 Package, Linear Analog Output, ±0.5°C Accuracy (UMW-Original)

Description

The LM35DZ is a precision analog temperature sensor with an output voltage linearly proportional to Celsius temperature. At 0°C, the output is 0V, and it rises by 10mV per °C—no Kelvin offset subtraction is required . This direct Celsius scaling makes it exceptionally easy to interface with any ADC.

The LM35DZ is the TO-92 plastic package variant, rated for 0°C to +100°C (the “D” suffix restricts the range compared to the full LM35 series) . It operates from 4V to 30V, draws less than 60µA, and has low self-heating of 0.08°C in still air . The low-impedance output allows direct connection to ADC inputs without buffering. The “/NOPB” suffix is a TI designation for lead-free (No Pb) packaging, making the part RoHS-compatible .

Critical limitation for the UMW variant: UMW produces compatible parts, but their actual accuracy and long-term stability may not match the genuine TI/National Semiconductor specifications. The TO-92 package also has poor thermal coupling to ambient air—the copper leads are the principal thermal path, so surface temperature measurement requires thermally bonding the leads to the measurement surface.

Features

• Direct Celsius Output: 0V at 0°C, 10mV/°C scale factor—no Kelvin offset subtraction required .

• Wide Supply Range (4V–30V): Flexible compatibility with 5V, 12V, and higher systems .

• Low Power Consumption: <60µA current draw, minimizing self-heating .

• Low Self-Heating: 0.08°C in still air .

• Low-Impedance Output: 0.1Ω for 1mA load, suitable for direct ADC connection .

• ±0.5°C Ensured Accuracy at 25°C (genuine TI spec; UMW may differ) .

• Lead-Free (NOPB) Packaging: RoHS-compatible construction .

• TO-92 Plastic Package: Standard 3-pin through-hole package for easy prototyping.

Technical Specifications