Remote junction temperature sensors are usually implemented in noisy environments. Noise is frequently generated by fast digital signals and if not filtered properly can induce errors that corrupt temperature measurements. The TMP43x have a built-in 65-kHz filter on the inputs of DXP and DXN to minimize the effects of noise. However, a differential low-pass filter can help attenuate unwanted coupled signals. Exact component values are application-specific. TI also recommends that the capacitor value remains from 0 pF to 2200 pF with a series resistance less than 1 kΩ.