DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/isl24837a ISL24837A FN7645
Rev 1.00
August 25, 2010 Programmable TFT-LCD VREF Generator
The ISL24837A contains a programmable 10-bit,
8-channel gamma DAC generator, a programmable
10-bit, 4-channel level shifter reference generator with
external gain control, a trimmed bandgap voltage
reference, and a digitally-controlled VCOM calibrator.
The reference voltage of ISL24837A is set by the
bandgap and two external feedback resistors, so the
output voltages are independent of AVDD. The VCOM
calibrator is the sink-current output that attaches to an
external voltage divider. The desired VCOM setting is
controlled by the I2C interface. Two banks of channels
with external pin or I2C control enable fast switching
between 2 different gamma curves stored in internal
EEPROM.
The ISL24837A is available in a 32 Ld QFN package
and is specified for operation over the -40В°C to +85В°C
temperature range. Features 8 Programmable 10-bit Gamma Voltages with
Bandgap-Trimmed Reference 4-Channel, 10-bit Programmable Amps with
Feedback Inputs for Level Shifter Reference …