LM2485 Datasheet - National Semiconductor

LM2485 220V Triple Bias Clamp

The LM2485 is a triple channel clamp amplifier used to DC restore the AC coupled outputs of a DTV CRT driver and for cut-off adjustment. The LM2485 also has an integrated blanking amplifier that can be used to drive the G1 grid of a CRT negative for vertical retrace blanking. The blanking output has.

LM2485 Features

* n n n n VCC capable of up to 220V VBB selectable to 8V or 12V via Pin 12 option Wide bias output voltage range of over 100V Inverted output pulse suitable for G1 blanking, selectable to 20VP-P or 40VP-P via Pin 13 option Applications n AC coupled CRT applications using DTV formats up to 1080i n Wel

LM2485_NationalSemiconductor.pdf