BUF08821 Series

8-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory

Catalog

8-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory

Part	Package / Case	Package / Case [custom]	Package / Case	Supplier Device Package	Output Type	Mounting Type	Current - Output / Channel	Number of Circuits [custom]	Current - Supply	Voltage - Supply, Single/Dual (±) [Min]	Voltage - Supply, Single/Dual (±) [Max]	Utilized IC / Part	Primary Attributes	Supplied Contents	Function	Type
Texas Instruments BUF08821BIPWPR	20-PowerTSSOP	4.4 mm	0.173 in	20-HTSSOP	Rail-to-Rail	Surface Mount	30 mA	8	4.6 mA	9 V	20 V
Texas Instruments BUF08821EVM-USB												BUF08821	1 8 LDOs	Board(s) Cable(s)	Amplifier Single	Video
Texas Instruments BUF08821AIPWPR	20-PowerTSSOP	4.4 mm	0.173 in	20-HTSSOP	Rail-to-Rail	Surface Mount	30 mA	8	4.6 mA	9 V	20 V

Catalog

8-CH Gamma-Voltage Generator and Vcom Calibrator with Integrated Two-Bank Memory

Key Features

• 10-BIT RESOLUTION8-CHANNEL P-GAMMA1-CHANNEL P-VCOM16x REWRITABLE NONVOLATILE MEMORYTWO INDEPENDENT PIN-SELECTABLE MEMORY BANKSRAIL-TO-RAIL OUTPUT:300mV Minimum Swing-to-Rail (10mA)> 300mA Maximum IOUTLOW SUPPLY CURRENTSUPPLY VOLTAGE: 9V to 20VDIGITAL SUPPLY: 2V to 5.5VI2C INTERFACE: Supports 400kHz and 3.4MHz Clock FrequencyAPPLICATIONSTFT-LCD REFERENCE DRIVERS10-BIT RESOLUTION8-CHANNEL P-GAMMA1-CHANNEL P-VCOM16x REWRITABLE NONVOLATILE MEMORYTWO INDEPENDENT PIN-SELECTABLE MEMORY BANKSRAIL-TO-RAIL OUTPUT:300mV Minimum Swing-to-Rail (10mA)> 300mA Maximum IOUTLOW SUPPLY CURRENTSUPPLY VOLTAGE: 9V to 20VDIGITAL SUPPLY: 2V to 5.5VI2C INTERFACE: Supports 400kHz and 3.4MHz Clock FrequencyAPPLICATIONSTFT-LCD REFERENCE DRIVERS

Description

The BUF08821 offers eight programmable gamma channels plus one programmable VCOMchannel. The final gamma and VCOMvalues can be stored in the on-chip, nonvolatile memory. To allow for programming errors or liquid crystal display (LCD) panel rework, the BUF08821 supports up to 16 write operations to the on-chip memory. The BUF08821 has two separate memory banks, allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves. All gamma and VCOMchannels offer a rail-to-rail output that typically swings to within 150mV of either supply rail with a 10mA load. All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz. The BUF08821 is manufactured using Texas Instruments’ proprietary, state-of-the-art, high-voltage CMOS process. This process offers very dense logic and HIGH supply voltage operation of up to 20V. The BUF08821 is offered in a HTSSOP-20 PowerPAD package. It is specified from –40°C to +85°C. The BUF08821 offers eight programmable gamma channels plus one programmable VCOMchannel. The final gamma and VCOMvalues can be stored in the on-chip, nonvolatile memory. To allow for programming errors or liquid crystal display (LCD) panel rework, the BUF08821 supports up to 16 write operations to the on-chip memory. The BUF08821 has two separate memory banks, allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves. All gamma and VCOMchannels offer a rail-to-rail output that typically swings to within 150mV of either supply rail with a 10mA load. All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz. The BUF08821 is manufactured using Texas Instruments’ proprietary, state-of-the-art, high-voltage CMOS process. This process offers very dense logic and HIGH supply voltage operation of up to 20V. The BUF08821 is offered in a HTSSOP-20 PowerPAD package. It is specified from –40°C to +85°C.