ISL24867
15‐Channel I2C Programmable TFT‐LCD
Reference Voltage Generator with Dual‐
Bank, DVR VCOM, GND Outputs,
EEPROM, and Ultra‐low Power
Operation
Key Features
15‐Channel Reference Voltage Outputs, I2C 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
Dual Bank Gamma Output, with Fast Output Bank Switching
GND Outputs Function, with Logic Control
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 Supply Operating Range
2.25V to 3.6V Digital Supply Operating Range
28 Ld 4x5mm Super Thin X2QFN Package
Pb‐free (RoHS Compliant)
Description
The ISL24867 is a programmable reference voltage generator for TFT‐LCDs featuring ultra‐
low power operation. The ISL24867 contains an I 2C programmable, 10‐bit, 14‐channel
gamma reference voltage generator with buffered dual bank outputs, an 8‐bit
programmable DVR VCOM calibrator, high output current VCOM amplifier, and a GND
outputs function with logic (EN) control. 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 supply voltage range. 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 from the other bank. Combining gamma and VCOM reference voltage generators,
with low power operation, and EEPROM, the ISL24867 provides a complete reference
voltage solution ideal for tablet, monitor, and mobile TFT‐LCD applications. The ISL24867
is available in a Super Thin 28 Ld 4x5mm X2QFN 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
VS Range (V)
Interface Type
Bus Interface Speed
Rail‐to‐Rail
IS
ISL24867
15
6.3 to 19
2
IC
0.4 MHz
Out
1.2 mA
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