ZHCSE08D May 2015 – January 2020 TMP107
PRODUCTION DATA.
The typical, three-conductor TMP107 measurement chain is fairly insensitive to electromagnetic distortions because the supply, ground and signal wires are running in parallel and located in the same cable housing. To help maintain this insensitivity, do not make any additional electric connections at intermediate nodes in the cable, or at the end of the chain of TMP107 devices.
There can be environmental effects on a TMP107 cable implementation in the form of conducted emission. The conducted susceptibility of the cable can be investigated if this is a suspected source of interference. Designing for electromagnetic compatibility with the intended operating environment can mitigate interference. There can be radiated emission from the TMP107 cable implementation that may affect the radiated susceptibility of surrounding equipment. See specification IEC61000-4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test for more information on testing for radiated immunity to signals in the 80-MHz to 6-GHz range. Also, see IEC61000-4-6: Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields for information on testing for conducted immunity in the 9-kHz to 80-MHz range.
Physical shielding and electrical filtering can mitigate much of the interference into and out of the surrounding environment and electronics. See IEC62153-4-X: Metallic Communication Cable Test Methods for information on determining the screening effectiveness of a metallic cable shield. The thermal conductivity of additional material around the cable implementation can affect the settling time of the TMP107 at its position in the cable. This thermal conductivity can also reduce the allowable temperature range exposure of the cable implementation depending on the materials chosen. Generally, passive electrical filtering is very effective at suppressing conducted interference. Circuit board components, such as an EMI filter that increases in resistance significantly in response to higher frequency content, are widely available and often easy to implement. Even simple RC and LC filter configurations on transmission lines provide some immunity.