isl24822

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DATASHEET
To request the full datasheet, please visit www.intersil.com/products/isl24822
Programmable 14-Channel x 2 Bank, 10-bit TFT-LCD
VREF Generator with Buffered VCOM Calibrator
ISL24822
Features
The ISL24822 is a programmable 14-Channel, 10-bit
reference voltage generator with a digitally-controlled VCOM
Calibrator and op amp. Two selectable banks of 14 channels
allow fast hardware or software switching between 2 different
gamma curves. The ISL24822 is configured and controlled via
a standard I2C Interface.
• 14 I2C-programmable 10-bit DACs
• Integrated programmable VCOM calibrator
• VCOM op amp
• 2 Banks of volatile memory for DACs
• 4.5V to 19V analog supply range
The ISL24822 is available in a 32 Ld TQFN package and is
specified for operation over the -40°C to +85°C temperature
range.
• 2.25V to 3.6V digital supply range
Applications
• 700µA digital supply current
• TFT-LCD column driver reference generator
• Pb-free (RoHS compliant)
• 20mA analog supply current (unloaded)
• I2C serial interface
• General-purpose reference voltage generators
GAMMA
TFT-LCD PANEL
TIMING
CONTROL
(TCON)
COLUMN DRIVERS
TFT-LCD SCREEN
ISL24822
GAMMA BUFFER
(COLUMN DRIVER
DAC REFERENCE
VOLTAGES)
VCOM
CALIBRATOR
VCOM
DRIVER
GATE
DRIVERS
DATA
LINE
SELECT
LINE
STORAGE
CAPACITOR
LC
PIXEL
TFT
COMMON
(V COM )
FIGURE 1. TYPICAL APPLICATION: TFT-LCD REFERENCE VOLTAGE GENERATOR
November 6, 2014
FN6664.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
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ISL24822
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be
accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
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FN6664.2
November 6, 2014