Texas Instruments recommends a 4-layer PCB with a solid ground plane on the bottom layer, and a thermal relief pattern on the top layer to minimize thermal resistance. Additionally, keeping the sensor away from heat sources and using thermal vias can improve accuracy.
The TMP175's output can be noisy due to its high sensitivity. To filter out noise, a simple RC low-pass filter with a cutoff frequency of around 10 Hz can be used. Additionally, averaging multiple readings or using a digital filter in the microcontroller can also help reduce noise.
The maximum cable length for the TMP175's digital output depends on the specific application and noise environment. As a general rule, Texas Instruments recommends keeping the cable length as short as possible (less than 10 cm) to minimize signal degradation and noise pickup. If longer cables are necessary, using a differential signal or a signal repeater can help maintain signal integrity.
The TMP175 has a built-in calibration mechanism, but for high-accuracy applications, additional calibration may be necessary. This can be done by measuring the sensor's output at multiple temperature points and creating a custom calibration curve. Texas Instruments provides a calibration guide and software tools to assist with this process.
The TMP175's response time to temperature changes depends on the thermal mass of the sensor and the surrounding environment. Typically, the response time is around 10-30 seconds for a 10°C temperature change. However, this can vary depending on the specific application and thermal conditions.
TMP175AIDG4 datasheet
by Texas Instruments
