Maxim provides a recommended PCB layout in the datasheet, but it's essential to follow good layout practices, such as keeping the input and output traces short and separate, using a solid ground plane, and minimizing noise coupling.
To ensure accurate temperature measurement, calibrate the device, use a high-accuracy voltage reference, and minimize thermal gradients on the PCB. Also, consider using a thermocouple or other temperature sensor with a high accuracy rating.
The maximum cable length for the I2C interface depends on the clock frequency, cable capacitance, and noise environment. As a general rule, keep the cable length below 1 meter for a 400 kHz clock frequency. Use a repeater or buffer if longer cable lengths are required.
To avoid latch-up or other issues, ensure that the power-up sequence is VCC first, then VDD, and finally the I2C clock. During power-down, reverse this sequence. Also, consider using a power sequencing controller or a voltage supervisor to manage the power-up and power-down process.
The recommended operating voltage range for the DS21T05Z+T&R is 2.7V to 5.5V. Operating outside this range may affect the device's accuracy, reliability, or functionality.
DS21T05Z+T&R datasheet
by Maxim Integrated Products
