A good PCB layout for the LM45CIM3X/NOPB should include a solid copper plane on the bottom layer to act as a heat sink, and thermal vias to connect the top and bottom layers. This helps to dissipate heat efficiently.
To ensure accurate temperature readings in high-noise environments, use a low-pass filter or a shielded cable to connect the LM45CIM3X/NOPB to the microcontroller or ADC. Additionally, consider using a noise-reducing capacitor between the VCC and GND pins.
The maximum cable length for the output signal of the LM45CIM3X/NOPB depends on the specific application and noise environment. As a general rule, keep the cable length as short as possible (less than 10 inches) to minimize signal degradation and noise pickup.
The LM45CIM3X/NOPB is rated for operation up to 150°C, but its accuracy and linearity may degrade at high temperatures. For high-temperature applications, consider using a thermocouple or thermistor with a higher temperature rating.
Calibration of the LM45CIM3X/NOPB involves trimming the internal offset and gain to match the specific application requirements. This can be done using an external calibration circuit or by using a microcontroller to adjust the output voltage.
LM45CIM3X/NOPB datasheet
by Texas Instruments
