LM75ADP datasheet by Philips Semiconductors

LM75ADP Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the LM75ADP?
  The LM75ADP can operate from -40°C to 125°C, but the accuracy of the temperature measurement is guaranteed from -25°C to 100°C.
• How do I handle the power-on reset (POR) of the LM75ADP?
  The LM75ADP has a built-in POR circuit that resets the device when the supply voltage (VCC) is powered on. To ensure proper operation, VCC should be ramped up slowly (typically 1-10 ms) to allow the POR circuit to settle.
• What is the recommended layout and placement for the LM75ADP?
  To minimize thermal gradients and ensure accurate temperature measurement, the LM75ADP should be placed close to the thermal source (e.g., CPU or GPU) and away from heat sinks or other sources of thermal noise. A ground plane under the device is also recommended to reduce thermal resistance.
• How do I calibrate the LM75ADP for high-accuracy temperature measurement?
  The LM75ADP has an internal calibration mechanism that can be trimmed using an external resistor (RTRIM) connected between pins 5 and 6. The recommended calibration procedure involves measuring the temperature error at multiple points and adjusting RTRIM accordingly.
• What is the maximum allowed capacitance on the SDA and SCL lines?
  The maximum allowed capacitance on the SDA and SCL lines is 400 pF. Exceeding this value can cause communication errors or even damage the device.