ZHCSIC9D April 2016 – June 2018 LMH1219
PRODUCTION DATA.
The LMH1219 has two Continuous Time Linear Equalizer (CTLE) blocks, one for each input. The CTLE compensates for frequency-dependent loss due to the transmission media prior to the device input. The CTLE accomplishes this by applying variable gain to the input signal, thereby boosting higher frequencies more than lower frequencies.
Only one CTLE is enabled at a time, in accordance with the input channel selected by the input mux. If IN0 is selected, the IN0 cable CTLE is powered on and the IN1 PCB CTLE is powered off. Alternatively, the two CTLEs can be bypassed either by using the OUT_CTRL pin or via register control.