The recommended PCB layout for the MAX6655MEE-T involves keeping the device away from heat sources, using a solid ground plane, and minimizing thermal gradients on the board. A 4-layer PCB with a dedicated thermal layer is recommended. Additionally, the device should be placed near the center of the board to minimize thermal gradients.
The MAX6655MEE-T does not require calibration for typical temperature measurement applications. However, for high-accuracy applications, calibration can be performed by measuring the device's output voltage at multiple temperature points and creating a lookup table or polynomial equation to correct for any non-linearity.
The maximum cable length for the remote temperature sensing diode connection depends on the cable's capacitance and the system's noise environment. As a general guideline, cable lengths up to 10 meters are acceptable, but longer cables may require additional filtering or shielding to prevent noise pickup.
Yes, the MAX6655MEE-T can measure temperatures below 0°C, but the accuracy may be reduced. The device's accuracy is specified from -20°C to +150°C, but it can measure temperatures as low as -50°C with reduced accuracy. For temperatures below -20°C, an external thermistor or other temperature sensor may be required.
The MAX6655MEE-T's POR and BOR features ensure that the device resets properly during power-up and power-down conditions. To handle these features, ensure that the power supply is stable and monotonic during power-up, and add a capacitor to the VCC pin to filter out any noise or glitches.
MAX6655MEE-T datasheet
by Maxim Integrated Products
