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BUF16821A

更新时间: 2024-11-13 06:44:39
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德州仪器 - TI /
页数 文件大小 规格书
30页 796K
描述
Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory

BUF16821A 数据手册

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BUF16821  
www.ti.com ............................................................................................................................................................... SBOS428BJULY 2008REVISED MAY 2009  
Programmable Gamma-Voltage Generator and  
VCOM Calibrator with Integrated Two-Bank Memory  
1
FEATURES  
DESCRIPTION  
234  
10-BIT RESOLUTION  
The BUF16821 offers 16 programmable gamma  
channels and two programmable VCOM channels.  
16-CHANNEL P-GAMMA  
2-CHANNEL P-VCOM  
The final gamma and VCOM values can be stored in  
the on-chip, nonvolatile memory. To allow for  
programming errors or liquid crystal display (LCD)  
panel rework, the BUF16821 supports up to 16 write  
operations to the on-chip memory.  
16x REWRITABLE NONVOLATILE MEMORY  
TWO INDEPENDENT PIN-SELECTABLE  
MEMORY BANKS  
RAIL-TO-RAIL OUTPUT  
The BUF16821 has two separate memory banks,  
allowing simultaneous storage of two different gamma  
curves to facilitate switching between gamma curves.  
300mV Min Swing-to-Rail (10mA)  
> 300mA Max IOUT  
LOW SUPPLY CURRENT  
All gamma and VCOM channels 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.  
SUPPLY VOLTAGE: 9V to 20V  
DIGITAL SUPPLY: 2V to 5.5V  
I2C™ INTERFACE: Supports 400kHz and  
3.4MHz  
The BUF16821 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  
BUF16821 is offered in a HTSSOP-28 PowerPAD™  
package, and is specified from –40°C to +85°C.  
APPLICATIONS  
TFT-LCD REFERENCE DRIVERS  
Analog  
Digital  
BKSEL  
(9V to 20V)  
(2.0V to 5.5V)  
1
RELATED PRODUCTS  
OUT1  
OUT2  
FEATURES  
PRODUCT  
BUF22821  
BUF12800  
BUF20800  
BUF20820  
BUF01900  
BUF11704  
BUF11705  
22-Channel Gamma Correction Buffer  
12-Channel Gamma Correction Buffer  
18-/20-Channel Programmable Buffer, 10-Bit, VCOM  
18-/20-Channel Programmable Buffer with Memory  
Programmable VCOM Driver  
OUT15  
OUT16  
18V Supply, Traditional Gamma Buffers  
22V Supply, Traditional Gamma Buffers  
VCOM  
1
2
VCOM  
SDA  
SCL  
Control IF  
BUF16821  
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
3
4
PowerPAD is a trademark of Texas Instruments.  
I2C is a trademark of NXP Semiconductors.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008–2009, Texas Instruments Incorporated  

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