DATASHEET
ISL24212 FN7590
Rev 0.00
March 15, 2011 Programmable VCOM Calibrator with EEPROM and Output Buffer
The ISL24212 is an 8-bit programmable current sink that can
be used in conjunction with an external voltage divider to
generate a voltage source (VCOM) positioned between the
analog supply voltage and ground. The current sink’s full-scale
range is controlled by an external resistor, RSET. With the
appropriate choice of external resistors R1 and R2, the VCOM
voltage range can be controlled between any arbitrary voltage
range. The ISL24212 has an 8-bit data register and 8-bit
EEPROM for storing both a volatile and a permanent value for
its output, accessible through a single up/down counter
interface pin (CTL). After the part is programmed with the
desired VCOM value, the Counter Enable pin (CE) can be
grounded to prevent further changes. On every power-up, the
EEPROM contents are automatically transferred to the data
register and the pre-programmed output voltage appears at
the VCOM_OUT pin.
The ISL24212 also features an integrated, wide-bandwidth,
high output drive buffer amplifier that can directly drive the
VCOM input of an LCD panel. …
