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BUF08821-BUF08821AIPWPR-BUF08821BIPWPR
Programmable Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory
BUF08821Analog
(9V to 20V)
Digital
(2.0V to 5.5V)BKSEL¼¼
OUT1 ¼
BUF08821
Programmable Gamma-Voltage Generator and COM Calibrator with Integrated Two-Bank Memory
Checkfor Samples: BUF08821
1FEATURES DESCRIPTIONThe BUF08821 offers eight programmable gamma
234• 10-BIT RESOLUTION channels plus one programmable VCOM channel.•
8-CHANNEL P-GAMMAThe final gamma and VCOM values can be storedin•
1-CHANNEL P-VCOMthe on-chip, nonvolatile memory. To allow for•
16x REWRITABLE NONVOLATILE MEMORY programming errorsor liquid crystal display (LCD)•
TWO INDEPENDENT PIN-SELECTABLE panel rework, the BUF08821 supports upto 16 write
MEMORY BANKS operationsto the on-chip memory.•
RAIL-TO-RAIL OUTPUT: The BUF08821 has two separate memory banks,
300mV Minimum Swing-to-Rail (10mA) allowing simultaneous storageof two different gamma>
300mA Maximum IOUT curvesto facilitate switching between gamma curves.•
LOW SUPPLY CURRENTAll gamma and VCOM channels offera rail-to-rail•
SUPPLY VOLTAGE: 9Vto 20Voutput that typically swingsto within 150mVof either•
DIGITAL SUPPLY: 2Vto 5.5V supply rail witha 10mA load. All channels are•
I2 C™ INTERFACE: Supports 400kHz and programmed using anI2C interface that supports
3.4MHz Clock Frequency standard operations upto 400kHz and high-speed
data transfersupto 3.4MHz.
APPLICATIONS The BUF08821 is manufactured using•
TFT-LCD REFERENCE DRIVERS Instruments’ proprietary, state-of-the-art,
CMOS process. This process offers very
and HIGH supply voltage operationofup The
BUF08821is offeredina HTSSOP-20 PowerPAD™
package.Itis specified from –40°Cto +85°C.
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