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BUF16820

更新时间： 2024-11-21 03:23:11
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BB 存储电压发生器
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30页 672K
描述
14-Channel GAMMA VOLTAGE GENERATOR with Programmable VCOM Outputs and OTP Memory

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BUF16820 数据手册

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BUF16820  
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U
F
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6
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SBOS356A − FEBRUARY 2006 − REVISED OCTOBER 2006  
14-Channel GAMMA VOLTAGE GENERATOR  
with Programmable V  
Outputs and OTP Memory  
COM  
FD EATURES  
AD PPLICATIONS  
REPLACES RESISTOR-BASED GAMMA  
SOLUTIONS  
14-CHANNEL GAMMA CORRECTION  
D
D
D
D
D
D
D
D
2 V  
OUTPUTS  
COM  
D
TFT-LCD REFERENCE DRIVERS  
ON-CHIP OTP MEMORY  
D
DYNAMIC GAMMA CONTROL  
10-BIT RESOLUTION  
RAIL-TO-RAIL OUTPUT  
DESCRIPTION  
LOW SUPPLY CURRENT: 1mA/ch  
SUPPLY VOLTAGE: 8.5V to 18V  
DIGITAL SUPPLY: 2.0V to 5.5V  
INDUSTRY-STANDARD, TWO-WIRE  
The BUF16820 is a programmable voltage reference  
generator designed for gamma correction in TFT-LCD  
panels. It provides 14 programmable outputs and two  
VCOM channels, each with 10-bit resolution. It offers  
on-chip, one-time programmable (OTP) memory that  
allows the user to store the gamma voltages on-chip. This  
eliminates the need for an external EEPROM.  
INTERFACE: 3.4MHz HIGH-SPEED MODE  
D
D
HIGH ESD RATING:  
4kV HBM, 1kV CDM, 200V MM  
DEMO BOARD AND SOFTWARE AVAILABLE  
This programmability replaces the traditional, time-  
consuming process of changing resistor values to optimize  
the various gamma voltages, and allows designers to  
determine the correct gamma voltages for a panel very  
quickly. Required voltage changes can also be easily  
implemented without changing the hardware.  
2V to 5.5V  
Digital  
8.5V to 18V  
Analog  
REFH  
BUF16820  
The BUF16820 uses TI’s latest, small-geometry analog  
CMOS process, which makes it a very competitive choice  
for full production, not just evaluation.  
REFH OUT  
OUT1  
Programming of each output occurs through an industry-  
standard, two-wire serial interface. Unlike existing  
programmable buffers, the BUF16820 offers a high-speed  
mode that allows clock speeds up to 3.4MHz.  
OUT2  
14 Output Channels plus  
Two V  
Channels  
COM  
For devices with a lower or higher channel count, please  
contact your local sales or marketing representative.  
OUT13  
OUT14  
The BUF16820 is available in an HTSSOP-32  
PowerPADpackage. It is specified from −40°C to +85°C.  
V
COM1  
BUF16820 RELATED PRODUCTS  
V
COM2  
FEATURES  
PRODUCT  
Channels, Memory BUF20820  
BUF12800  
REFL OUT  
18-Channel Programmable, Two V  
COM  
SDA  
SCL  
12-Channel Programmable Buffer, 10-Bit  
Programmable V  
Control IF  
BUF01900  
COM  
10 + 1 Channel Gamma Buffer, 22V Supply Voltage  
Complete LCD DC/DC Solution  
BUF11705  
TPS651xx  
LD  
A0  
REFL  
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.  
PowerPAD is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners.  
ꢀꢁ ꢂ ꢃꢄ ꢅ ꢆꢇ ꢂꢈ ꢃ ꢉꢆꢉ ꢊꢋ ꢌꢍ ꢎ ꢏꢐ ꢑꢊꢍꢋ ꢊꢒ ꢓꢔ ꢎ ꢎ ꢕꢋꢑ ꢐꢒ ꢍꢌ ꢖꢔꢗ ꢘꢊꢓ ꢐꢑꢊ ꢍꢋ ꢙꢐ ꢑꢕꢚ ꢀꢎ ꢍꢙꢔ ꢓꢑꢒ  
ꢓ ꢍꢋ ꢌꢍꢎ ꢏ ꢑꢍ ꢒ ꢖꢕ ꢓ ꢊ ꢌꢊ ꢓ ꢐ ꢑꢊ ꢍꢋꢒ ꢖ ꢕꢎ ꢑꢛꢕ ꢑꢕ ꢎ ꢏꢒ ꢍꢌ ꢆꢕꢜ ꢐꢒ ꢇꢋꢒ ꢑꢎ ꢔꢏ ꢕꢋꢑ ꢒ ꢒꢑ ꢐꢋꢙ ꢐꢎ ꢙ ꢝ ꢐꢎ ꢎ ꢐ ꢋꢑꢞꢚ  
ꢀꢎ ꢍ ꢙꢔꢓ ꢑ ꢊꢍ ꢋ ꢖꢎ ꢍ ꢓ ꢕ ꢒ ꢒ ꢊꢋ ꢟ ꢙꢍ ꢕ ꢒ ꢋꢍꢑ ꢋꢕ ꢓꢕ ꢒꢒ ꢐꢎ ꢊꢘ ꢞ ꢊꢋꢓ ꢘꢔꢙ ꢕ ꢑꢕ ꢒꢑꢊ ꢋꢟ ꢍꢌ ꢐꢘ ꢘ ꢖꢐ ꢎ ꢐꢏ ꢕꢑꢕ ꢎ ꢒꢚ  
Copyright 2006, Texas Instruments Incorporated  
www.ti.com  
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