Original question:
Tool/software:
Hi team,
customer uses the LMT01 on the heatsink to measure temp.
But this is a high-noise environment. There is a MOSFET on the heat sink and PWM is controlling this component. Customers test that the data will be transmitted correctly only when the heat sink is more than 2cm away. I would like to ask if there is any recommended method to avoid the result.
Hi Jimmy,
This is a common issue for analog devices used in high-EMI environments. In the case of LMT01, the 1st recommendation would be to implement transistor level shifting. Depending on the noise level, a capacitive load can also be added at the output for noise-filtering--keeping in mind the RC response.
In this case, I would also recommend looking into using ISOTMP35 which allows to solder the device directly to a HV FET heat sink and provides integrated-isolation.
Best regards,
Simon Rojas
