ISL24833

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18-Channel Programmable I<sup>2</sup>C TFT-LCD Reference Voltage Generator

OVERVIEW

The ISL24833 is an 18-channel, 10-bit I2 C programmable reference voltage generator for TFT-LCDs with dual bank outputs. It also provides an I2 C programmable, 1-channel, 8-bit VCOM calibrator with VCOM amplifier and internal EEPROM.

The two output banks are capable of switching quickly (<1µs) enabling rapid switching between two gamma curves (or operational modes) in TFT-LCD applications. The ISL24833 also integrates two banks of EEPROM that can store all reference voltage data. The EEPROM is capable of >300 write cycles.

Combining gamma and VCOM reference voltage generators with low power operation and EEPROM, the ISL24833 provides a complete reference voltage solution ideal for large area TFT-LCD display applications.

The ISL24833 is available in a 32 Ld 5mmx6mm QFN thermally enhanced package. It is specified for operation across the -40°C to +85°C temperature range.

KEY FEATURES

  • 18-channel I2C programmable 10-bit DACs
  • Integrated I2C programmable 8-bit VCOM calibrator
  • One VCOM op amp
  • Two banks of EEPROM storage (rewriteable >300 times)
  • Fast output bank switching: <1µs typical
  • Analog supply: 12V to 18V at 15mA (unloaded)
  • Digital supply: 2.5V to 3.3V at 1.3mA (unloaded)
  • I2C serial interface
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL24833
Basic Information
Production Status
Mass Production
# of Devices/ Channels
18
Supply Voltage Vs Range (V)
10.8 to 19
Bus/Output Interface
I2C
Bus Interface Speed
0.4 MHz
Rail-to-Rail
Out
IS
15 mA
Qualification Level
Standard
Temperature Range
-40 to +85

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