ISL1220IUZ-T footprint, schematic symbol and 3D model by Renesas Electronics

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ISL1220IUZ-T Details

A 4-layer PCB with a solid ground plane and a separate analog ground plane is recommended. Keep the analog and digital grounds separate and connect them at a single point. Use a 10uF capacitor between VCC and GND, and a 1uF capacitor between AVCC and AGND.
Use a thermistor with a high accuracy rating (e.g., ±0.1°C) and ensure good thermal contact between the thermistor and the device being measured. Also, calibrate the temperature measurement by comparing it to a known temperature reference.
The maximum cable length for the I2C interface is approximately 10 meters (33 feet) with a 400 kHz clock frequency. However, this can be extended up to 20 meters (66 feet) with a 100 kHz clock frequency.
The POR and BOR features are enabled by default. To disable them, tie the POR/BOR pin to VCC. To use them, connect the POR/BOR pin to a capacitor to GND, and ensure the capacitor value is between 10nF and 100nF.
The recommended clock frequency for the I2C interface is between 100 kHz and 400 kHz. However, the device can operate up to 1 MHz clock frequency, but with reduced noise immunity.

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