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BUF08821BIPWPR Datasheet(PDF) 1 Page - Texas Instruments |
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BUF08821BIPWPR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 27 page BUF08821 Analog (9Vto20V) Digital (2.0Vto5.5V) BKSEL V COM OUT7 OUT8 OUT1 OUT2 A0 SCL SDA ControlIF BUF08821 1 BUF08821 www.ti.com ................................................................................................................................................. SBOS438C – AUGUST 2008 – REVISED AUGUST 2009 Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory Check for Samples: BUF08821 1 FEATURES DESCRIPTION 234 • 10-BIT RESOLUTION The BUF08821 offers eight programmable gamma channels plus one programmable VCOM channel. • 8-CHANNEL P-GAMMA • 1-CHANNEL P-VCOM The final gamma and VCOM values can be stored in the on-chip, nonvolatile memory. To allow for • 16x REWRITABLE NONVOLATILE MEMORY programming errors or liquid crystal display (LCD) • TWO INDEPENDENT PIN-SELECTABLE panel rework, the BUF08821 supports up to 16 write MEMORY BANKS operations to the on-chip memory. • RAIL-TO-RAIL OUTPUT: The BUF08821 has two separate memory banks, 300mV Minimum Swing-to-Rail (10mA) allowing simultaneous storage of two different gamma > 300mA Maximum IOUT curves to facilitate switching between gamma curves. • LOW SUPPLY CURRENT All gamma and VCOM channels offer a rail-to-rail • SUPPLY VOLTAGE: 9V to 20V output that typically swings to within 150mV of either • DIGITAL SUPPLY: 2V to 5.5V supply rail with a 10mA load. All channels are programmed using an I2C interface that supports • I2C ™ INTERFACE: Supports 400kHz and standard operations up to 400kHz and high-speed 3.4MHz Clock Frequency data transfers up to 3.4MHz. APPLICATIONS The BUF08821 is manufactured using Texas Instruments’ proprietary, state-of-the-art, high-voltage • TFT-LCD REFERENCE DRIVERS 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. RELATED PRODUCTS FEATURES PRODUCT 22-Channel Gamma Correction Buffer BUF22821 16-Channel Gamma Correction Buffer BUF16821 12-Channel Gamma Correction Buffer BUF12800 18-/20-Channel Programmable Buffer, 10-Bit, VCOM BUF20800 18-/20-Channel Programmable Buffer with Memory BUF20820 Programmable VCOM Driver BUF01900 18V Supply, Traditional Gamma Buffers BUF11704 22V Supply, Traditional Gamma Buffers BUF11705 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 PowerPAD is a trademark of Texas Instruments, Incorporated. 3 I2C is a trademark of NXP Semiconductors. 4 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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