Texas Instruments recommends a 4-layer PCB with a solid ground plane and a separate analog ground plane to minimize noise and electromagnetic interference. The LM45CIM3X should be placed near the center of the board, away from high-current paths and heat sources.
The LM45CIM3X does not require calibration, as it is factory-calibrated to provide accurate temperature measurements. However, if high-accuracy measurements are required, users can perform a one-point calibration by measuring the device's output voltage at a known temperature point and adjusting the offset voltage accordingly.
The maximum cable length for the LM45CIM3X's output signal depends on the specific application and the noise environment. As a general rule, Texas Instruments recommends keeping the cable length as short as possible (less than 10 inches) to minimize noise pickup and signal degradation. If longer cable lengths are required, users should consider using twisted-pair cables and shielding to reduce electromagnetic interference.
The LM45CIM3X is specified to operate up to 150°C, but it can be used in high-temperature applications above 150°C with some limitations. However, the device's accuracy and linearity may degrade at higher temperatures, and users should consult the datasheet and application notes for guidance on using the device in extreme temperature environments.
To protect the LM45CIM3X from EMI and RFI, users should follow good PCB design practices, such as using a solid ground plane, separating analog and digital circuits, and using shielding and filtering components. Additionally, users can consider using EMI filters or common-mode chokes to reduce noise and interference.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
