ROHM provides a recommended PCB layout in their application note AN11984, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
The LTR18EZPF1502 requires a bias voltage of 2.5V to 5.5V on the VCC pin, and a bias current of 1mA to 10mA on the IBIAS pin. Ensure that the bias voltage and current are within these ranges to achieve optimal performance and accuracy.
ROHM recommends a two-point calibration procedure, where the sensor is calibrated at two different temperatures (e.g. 0°C and 50°C) to determine the offset and gain coefficients. These coefficients can then be used to correct the sensor output for accurate temperature measurement.
The ratiometric output of the LTR18EZPF1502 means that the output voltage is proportional to the supply voltage. To handle this, use an analog-to-digital converter (ADC) with a reference voltage that is proportional to the supply voltage, or use a voltage regulator to stabilize the supply voltage.
The LTR18EZPF1502 is rated for operation from -40°C to 150°C, making it suitable for high-temperature applications such as automotive, industrial, and aerospace.
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