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DATASHEET
To request the full datasheet, please visit www.intersil.com/products/isl24858
15-Channel I
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C Programmable TFT-LCD Reference
Voltage Generator with Integrated EEPROM, and
Ultra-low Power Operation
ISL24858
The ISL24858 is a programmable reference voltage generator
for TFT-LCDs featuring ultra-low power operation. The
ISL24858 contains an I
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C programmable, 10-bit, 14-channel
gamma reference voltage generator with buffered outputs, a
10-bit programmable V
COM
calibrator, a high output current
V
COM
amplifier, and internal EEPROM to store all reference
voltage data. The EEPROM features an endurance of 10,000
write cycles.
Combining gamma and V
COM
reference voltage generators
with low power operation and EEPROM, the ISL24858 provides
a complete reference voltage solution ideal for tablet, monitor,
and mobile TFT-LCD applications.
The ISL24858 is available in a super thin 28 Ld 4x5mm
X2QFN thermally enhanced package. It is specified for
operation over the -40°C to +105°C ambient temperature
range.
Features
• 15-Channel Reference Voltage Outputs, I
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C Programmable:
- 14-Channel Gamma References, 10-bit Resolution with
Buffered Outputs
- 1-Channel V
COM
Calibrator with 10-bit Resolution
• High Output Current V
COM
Amplifier
• Ultra-low Power Operation, Ideal for Tablet and Mobile
Applications: Typical Quiescent Power, 12mW @ 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 Supply Operating Range
• 2.25V to 3.6V Digital Supply Operating Range
• 28 Ld 4x5mm Super Thin X2QFN Package
• Pb-free (RoHS Compliant)
Applications
• Tablet, Notebook, Monitor TFT-LCD
•Mobile - 2D/3D TFT-LCD
• General-Purpose Reference Voltage Generator
COLUMN DRIVERS
GATE
DRIVERS
TIMING
CONTROL
(TCON)
TFT-LCD SCREEN
TFT-LCD PANEL
COMMON
(V
COM
)
SELECT
LINE
DATA
LINE
STORAGE
CAPACITOR
LC PIXEL
TFT
GAMMA
ISL24858
V
COM
DRIVER
V
COM
CALIBRATOR
GAMMA BUFFER (COLUMN
DRIVER DAC REFERENCE
VOLTAGES), AND V
COM
REFERENCES
FIGURE 1. TYPICAL APPLICATION: TFT-LCD REFERENCE VOLTAGE GENERATOR
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners. I
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C Bus™ is a trademark owned by NXP Semiconductors Netherlands, B.V.
August 2, 2012
FN8295.2
