Package and board-fit: 16-QFN with exposed pad
The LM224QT: Housed in a 16-VFQFN exposed-pad package (3x3 mm body per the supplier device package), this op-amp requires a thermal land on the PCB to draw heat from the die — the exposed paddle should be soldered to a copper plane for rated thermal performance.
Supply span and temperature grade
The -40°C to 105°C operating range places it in the industrial temperature band, meaning it handles enclosure heat in factory-floor panels without derating.
Input offset and bias current
With a 2 mV typical input offset voltage and 20 nA input bias current, the LM224QT is a workhorse general-purpose amplifier — the offset is low enough for most sensor interfaces without external trimming, though a precision front-end would reach for a lower-Vos part.