Other Parts Discussed in Thread: TMP451,
Hi There,
We plan to use TMP451 to monitor near-end MCU A and a remote Transistor to monitor far-end MCU B. I think it's topical application, so it shall have no risk, is it correct?
After reading the layout guide. I have one unclear point that may need your help to clarify:
" If the connection between the remote temperature sensor and the TMP451-Q1 device is less than 8-in (20,32
cm) long, use a twisted-wire pair connection. For lengths greater than 8 in, use a twisted, shielded pair with
the shield grounded as close to the TMP451-Q1 device as possible. Leave the remote sensor connection
end of the shield wire open to avoid ground loops and 60-Hz pickup."
What is the twisted-wire pair connection mentioned here?
Usually, the twisted wire pair only exited on "cable", in terms of PCB layout, it should only route as differential pair with proper impedance control.
Could you please have a further explanation for this point?
Furthermore, is there any Max length limitation between TMP451 and remote BJT?
Frank