- 您现在的位置：买卖IC网 > PDF目录223464 > BUF01900AIDRCR (TEXAS INSTRUMENTS INC) SPECIALTY ANALOG CIRCUIT, PDSO10 PDF资料下载
参数资料
| 型号： | BUF01900AIDRCR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| 封装： | 3 X 3 MM, 0.90 MM HEIGHT, GREEN, PLASTIC, SON-10 |
| 文件页数： | 6/26页 |
| 文件大小： | 662K |
| 代理商： | BUF01900AIDRCR |
BUF01900
BUF01901
SBOS337A OCTOBER 2006 REVISED OCTOBER 2006
www.ti.com
14
VCOM CALIBRATION
The BUF0190x provides a simple, time- and cost-efficient
means to adjust the flicker performance of LCD panels ei-
ther manually or automatically during the final stages of the
LCD panel manufacturing process.
The 10-bit adjustment resolution of the BUF0190x ex-
ceeds the typical adjustment resolution of existing VCOM
calibrators significantly. As with a traditional VCOM adjust-
ment, which uses a mechanical potentiometer and a volt-
age divider for adjustment (see Figure 21), the BUF0190x
uses an external voltage divider that is used to set the ini-
tial VCOM voltage as well as the adjustment range.
AVDD
R
B
R
A
R
C
V
COM
Figure 21. Traditional VCOM Adjustment
As Figure 22 shows, the 10-bit DAC acts as a Rail-to-Rail
output voltage source with a nominal 250k
of output im-
pedance. For example, at Code 000h, the lowest VCOM
voltage is achieved since the 250k
impedance is now in
parallel with R2, which lowers the impedance of the lower
side of the voltage divider. Consequently, code 3FFh re-
sults in the highest adjustable VCOM voltage.
Once the desired output level is obtained, the part can
store the final setting using the non-volatile on-chip
memory. See Programming section for detailed informa-
tion.
V
S
R
2
R
1
V
BIAS
V
COM
(1)
NOTE: (1) Integrated into BUF01900 or external.
(a) Code 00h equivalent circuit.
(b) Code 3FFh equivalent circuit.
250k
BUF0190x
V
S
V
S
R
2
R
1
V
BIAS
V
COM
(1)
250k
BUF0190x
Figure 22. Simplified Block Diagram for VCOM
Adjustment using BUF0190x
SELECTING THE ADJUSTMENT STEP SIZE
A maximum of 1024 adjustment steps can be realized with
the BUF0190x, leading to very high adjustment resolution
and very small step sizes. This flexibility can be advanta-
geous during the panel development phase. In a practical
production setting, however, this capability might lead to
adjustment times that can be too long. A simple solution is
to increase the step size between settings to more practi-
cal values for mass production. Limiting the number of ad-
justment steps between code 000h and code 3FFh to be-
tween 16 and 128 has been shown to typically yield
acceptable adjustment results in the smallest amount of
adjustment time.
相关PDF资料 |
PDF描述 |
|---|---|
| BUF08821AIPWPR | VIDEO CLOCK GENERATOR, PDSO20 |
| BUK657-600B | N-Channel Enhancement MOSFET |
| BUK657-600C | N-Channel Enhancement MOSFET |
| BUK7105-40ATE | TrenchPLUS standard level FET |
| BUK7107-40ATC | TrenchPLUS standard level FET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BUF01900AIDRCRG4 | 功能描述:LCD Gamma缓冲器 Ref Vltg Gen for VCOM Adj RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
| BUF01900AIDRCT | 功能描述:LCD Gamma缓冲器 Ref Vltg Gen for VCOM Adj RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
| BUF01900AIDRCTG4 | 功能描述:LCD Gamma缓冲器 Ref Vltg Gen for VCOM Adj RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
| BUF01900AIPW | 功能描述:LCD Gamma缓冲器 Ref Vltg Gen for VCOM Adj RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
| BUF01900AIPWG4 | 功能描述:LCD Gamma缓冲器 Ref Vltg Gen for VCOM Adj RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。