ISL24863A
15‐Channel I2C Programmable TFT‐
LCD Reference Voltage Generator
with Dual‐Bank, DVR VCOM,
Integrated EEPROM, and Ultra‐low
Power Operation
Key Features
2
15‐Channel Reference Voltage Outputs, I C Programmable
14‐Channel Gamma References, 10‐bit Resolution, with Buffered Dual‐Bank
Outputs
1‐Channel VCOM Calibrator (“DVR”), 8‐bit Current‐Sink DAC
High Output Current VCOM Amplifier
Fast Output Bank Switching
Dual Bank Gamma
Ultra‐low Power Operation, Ideal for Tablet and Mobile TFT‐LCD Applications:
Quiescent Power 13mW @ 8V AVDD
EEPROM Endurance: 10,000 Write Cycles
Read/Write Capable Over 2.25V to 3.6V DVDD Range
6.3V to 19V Analog Operating Supply Range
2.25V to 3.6V Digital Operating Supply Range
32‐LD 5x5mm TQFN Package
Pb‐free (RoHS Compliant)
Description
The ISL24863A is a 15‐channel I2C programmable reference voltage generator for
TFT‐LCDs featuring ultra‐low power operation. It features 14 general purpose 10‐
bit DACs with buffered dual bank outputs, which can be used to set the column
driver reference voltages of a TFT‐LCD panel (gamma correction). The device also
has an 8‐bit current‐sink DAC for VCOM calibration, and a high output current VCOM
amplifier. The integrated EEPROM, for storing all reference voltage data, features
an endurance of 10,000 write cycles and is read/write capable over the digital
l
l
The dual bank outputs are capable of fast switching between different sets of
voltage reference data. Bank switching is ideal to quickly change between gamma
curves for 2D/3D TFT‐LCD applications. The device’s outputs are double buffered,
which allows for updating data in one bank while data is simultaneously output
Combining gamma and VCOM reference voltage generators, with low power
operation, and EEPROM, the ISL24863A provides a complete reference voltage
solution ideal for tablet, monitor, and mobile TFT‐LCD applications.
The ISL24863A is available in a 32 Ld 5x5mm TQFN thermally enhanced package. It
is specified for operation over the ‐40°C to +85°C ambient temperature range.
Applications
Tablet, Notebook, Monitor TFT‐LCD
Mobile ‐ 2D/3D TFT‐LCD
General‐Purpose Reference Voltage Generator
Parameters
# of Devices/ Channels
ISL24863A
15
VS Range (V)
6.3 to 19
Interface Type
I2C
0.4 MHz
Bus Interface Speed
Rail‐to‐Rail
IS
Out
1.1 mA
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