7.3.2 Input Carrier Detect

Both inputs of the LMH1219 have a Carrier Detect circuit to monitor the presence or absence of the input signal. When the input signal amplitude for the selected input (determined by IN_OUT_SEL pin) surpasses the Carrier Detect assert threshold, the LMH1219 operates in normal mode.

In the absence of an input signal, the LMH1219 automatically goes into Power Save Mode to conserve power consumption. When a valid signal is detected, the LMH1219 automatically exits Power Save Mode and returns to the normal operating mode.