TMP401AIDGKRG4 datasheet by Texas Instruments

TMP401AIDGKRG4 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  Texas Instruments recommends a 4-layer PCB with a thermal pad on the bottom layer, connected to a large copper area on the top layer to dissipate heat efficiently. A thermal via array can also be used to improve thermal conductivity.
• How do I handle the TMP401's high output impedance?
  To minimize the effects of high output impedance, use a buffer amplifier or an op-amp with a high input impedance (>10MΩ) to condition the output signal. Additionally, keep the output trace length short and use a low-capacitance cable to reduce signal degradation.
• What is the recommended calibration procedure for the TMP401?
  Texas Instruments recommends a 2-point calibration procedure: 1) Measure the output voltage at 0°C (ice bath) and 2) Measure the output voltage at 100°C (boiling water). Use these points to calculate the gain and offset values for the temperature calculation.
• How do I ensure accurate temperature measurements in high-temperature environments?
  To ensure accuracy in high-temperature environments, use a thermocouple or RTD sensor in conjunction with the TMP401. This will provide a more accurate temperature reading, as the TMP401 may exhibit non-linearity above 125°C.
• What is the maximum allowed voltage on the VCC pin?
  The maximum allowed voltage on the VCC pin is 5.5V. Exceeding this voltage may damage the device. It's recommended to use a voltage regulator or a voltage clamp to ensure the VCC pin remains within the specified range.