For optimal thermal performance, it is recommended to use a 4-layer PCB with a solid ground plane on the bottom layer, and to place the MAX6649MUA+T near a thermal pad or a heat sink. Additionally, keep the thermal path short and direct to minimize thermal resistance.
To ensure accurate temperature measurement in a noisy environment, use a low-pass filter or a shielded cable to connect the thermistor to the MAX6649MUA+T. Also, consider using a differential measurement technique and averaging multiple readings to reduce noise.
The maximum cable length for the thermistor connection depends on the specific application and the noise environment. As a general rule, keep the cable length as short as possible (less than 1 meter) to minimize noise pickup and signal degradation.
The MAX6649MUA+T is optimized for use with 10kΩ NTC thermistors, but it can be used with other types of thermistors with some adjustments. However, the accuracy and linearity of the temperature measurement may be affected. Consult the datasheet and application notes for more information.
The MAX6649MUA+T does not require calibration, as it uses a built-in thermistor curve to convert the thermistor resistance to temperature. However, you may need to calibrate the system as a whole to account for any offsets or nonlinearities in the thermistor or other components.
MAX6649MUA+T datasheet
by Maxim Integrated Products
