TMP422AQDCNTQ1 datasheet by Texas Instruments

TMP422AQDCNTQ1 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  Texas Instruments recommends a 2-layer or 4-layer PCB with a solid ground plane and thermal vias to ensure good thermal conductivity. A minimum of 2 oz copper thickness is recommended for the thermal pad.
• How do I handle the thermal pad during PCB assembly?
  The thermal pad should be soldered to the PCB using a solder paste with a high thermal conductivity. A solder reflow profile with a peak temperature of 260°C is recommended. Avoid using excessive solder or flux, as it can compromise the thermal performance.
• What is the maximum junction temperature (Tj) for this device?
  The maximum junction temperature (Tj) for the TMP422AQDCNTQ1 is 150°C. Operating the device above this temperature can reduce its reliability and lifespan.
• How do I calibrate the temperature sensor for optimal accuracy?
  The TMP422AQDCNTQ1 has a built-in calibration mechanism. However, for optimal accuracy, it is recommended to perform a 2-point or 3-point calibration using a precision temperature reference source, such as a thermocouple or a platinum RTD.
• What is the recommended power-up sequence for this device?
  The recommended power-up sequence for the TMP422AQDCNTQ1 is to apply VCC first, followed by the input voltage (VIN). This ensures that the internal voltage regulators are properly initialized and the device operates correctly.