Board Layout
7
SNIU040 – November 2019
Copyright © 2019, Texas Instruments Incorporated
TMP392EVM User's Guide
4
Board Layout
The PCB is a four-layer board that includes a power regulator, the TMP392 sensor, all of the necessary
auxiliary circuitry, and various test points. The portion of the board where the sensor and resistors is
located may be broken off for evaluation separately from the rest of the EVM. This breakout board was
minimized in size to reduce the thermal mass for improving the thermal response of the TMP392.
Further layout considerations in the final design using the TMP392 may be required based on the
application. Refer to
Temperature Sensors: PCB Guidelines for Surface Mount Devices
for design and
layout recommendations for temperature sensors. The breakout board includes resistors rated up to
150°C for high-temperature testing, as well as the decoupling capacitor C7, which is placed as close as
possible to the TMP392.
NOTE:
This PCB will not withstand temperatures of 150°C for extended periods of time because it
was not manufactured with high-temperature material.
5
Schematic and Bill of Materials
Figure 6. TMP392 Evaluation Board Schematic