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BUF12840_12

更新时间： 2024-09-25 12:52:35
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德州仪器 - TI 存储电压发生器可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数 文件大小 规格书
26页 395K
描述
Programmable Gamma-Voltage Generator with Integrated Two-Bank Memory and External EEPROM

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BUF12840  
www.ti.com  
SBOS519A –OCTOBER 2010–REVISED JULY 2011  
Programmable Gamma-Voltage Generator  
with Integrated Two-Bank Memory and External EEPROM  
1
FEATURES  
DESCRIPTION  
The BUF12840 offers 12 programmable gamma  
channels with external electrically erasable  
programmable read-only memory (EEPROM) read  
capabilities.  
2
•
•
•
•
10-BIT RESOLUTION  
12-CHANNEL P-GAMMA  
READS FROM EXTERNAL EEPROM  
TWO INDEPENDENT PIN-SELECTABLE  
MEMORY BANKS  
The BUF12840 has two separate memory banks that  
allow simultaneous storage of two different gamma  
curves to facilitate switching between gamma curves.  
•
RAIL-TO-RAIL OUTPUT:  
–
–
300mV Min Swing-to-Rail (10mA)  
200mV Min Swing-to-Rail (5mA)  
All gamma channels offer a rail-to-rail output that  
typically swings to within 200mV of either supply rail  
with a 5mA load. All channels are programmed using  
a two-wire interface that supports standard operations  
up to 400kHz and high-speed data transfers up to  
3.4MHz.  
•
•
•
•
LOW SUPPLY CURRENT  
SUPPLY VOLTAGE: 9V to 20V  
DIGITAL SUPPLY: 2V to 5.5V  
TWO-WIRE INTERFACE: Supports 400kHz and  
3.4MHz Operation  
The BUF12840 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  
BUF12840 is offered in a QFN-24 package, and is  
specified from –40°C to +95°C.  
APPLICATIONS  
•
TFT-LCD REFERENCE DRIVERS  
VSD  
BKSEL  
RELATED PRODUCTS  
FEATURES  
BUF12840  
1
PRODUCT  
BUF22821  
BUF12800  
BUF20800  
BUF20820  
BUF01900  
BUF11704  
BUF11705  
22-Channel Gamma Correction Buffer  
12-Channel Gamma Correction Buffer  
20-Channel Programmable Buffer, 10-Bit, VCOM  
16-/20-Channel Programmable Buffer with Memory  
Programmable VCOM Driver  
VS  
OUT0  
OUT1  
18V Supply, Traditional Gamma Buffers  
22V Supply, Traditional Gamma Buffers  
OUT9  
OUT10  
OUT11  
External  
Memory  
Control  
SDA  
SCL  
Control (IF and Memory)  
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
All 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 © 2010–2011, Texas Instruments Incorporated  
1234567...26

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