The EL9200, EL9201, and EL9202 represent programmable VCOM amplifiers for use in TFT-LCD displays. Featuring 1, 2, and 4 channels of VCOM amplification, respectively, each device features just a single programmable current source for adding offset to one VCOM output. This current source is programmable using a single wire interface to one of 128 levels. The value is stored on an internal EEPROM memory.