ISL24863A
15-Channel I²C Programmable TFT-LCD Reference Voltage Generator with Dual-Bank, DVR V_COM, Integrated 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 V_COM 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 A_VDD
• EEPROM Endurance: 10,000 Write Cycles
• Read/Write Capable Over 2.25V to 3.6V D_VDD 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 V_COM calibration, and a high output current V_COM 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 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 V_COM 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