Accuracy and resolution trade-off across the full temperature band
The LM94021BIMG delivers ±1.5°C typical accuracy in the 20°C to 40°C sweet spot, widening to ±2.7°C across the full -50°C to 150°C range — the wider limit matters if your system sees thermal extremes and you cannot calibrate per board. Resolution is programmable from 5.5 mV/°C to 13.6 mV/°C, letting you trade noise immunity against temperature granularity: at the higher gain, a 1°C step produces 13.6 mV, easing the ADC's noise floor requirement.
Supply flexibility and package fit
Housed in a 5-lead SC-70 (SOT-353) package, the footprint is 2.0 mm × 2.1 mm — small enough to place close to the heat source on a dense PCB without routing a digital bus.
Lifecycle and compliance reality
Note the RoHS non-compliance: this part is not RoHS-compliant, which may restrict its use in EU or green-procurement BOMs unless an exemption applies.