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BUF04701AIPWR

更新时间： 2024-02-24 13:05:29
品牌 Logo 应用领域
德州仪器 - TI 缓冲放大器放大器电路光电二极管
页数 文件大小 规格书
13页 278K
描述
4-Channel, Rail-to-Rail, CMOS BUFFER AMPLIFIER

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BUF04701AIPWR 技术参数

是否Rohs认证：符合生命周期：Obsolete
零件包装代码：TSSOP包装说明：TSSOP-14
针数：14Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：1 week风险等级：5.75
Is Samacsys：N放大器类型：BUFFER
最大平均偏置电流 (IIB)：0.00001 µA标称带宽 (3dB)：8 MHz
25C 时的最大偏置电流 (IIB)：0.00001 µA最大输入失调电压：7000 µV
JESD-30 代码：R-PDSO-G14JESD-609代码：e4
长度：5 mm湿度敏感等级：1
负供电电压上限：-6.6 V标称负供电电压 (Vsup)：-5 V
功能数量：4端子数量：14
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP14,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH包装方法：TR
峰值回流温度（摄氏度）：260电源：3.5/12 V
认证状态：Not Qualified座面最大高度：1.2 mm
标称压摆率：10 V/us子类别：Buffer Amplifier
最大压摆率：6.8 mA供电电压上限：6.6 V
标称供电电压 (Vsup)：5 V表面贴装：YES
技术：CMOS温度等级：AUTOMOTIVE
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：4.4 mm
Base Number Matches：1

BUF04701AIPWR 数据手册

 浏览型号BUF04701AIPWR的Datasheet PDF文件第6页浏览型号BUF04701AIPWR的Datasheet PDF文件第7页浏览型号BUF04701AIPWR的Datasheet PDF文件第8页浏览型号BUF04701AIPWR的Datasheet PDF文件第10页浏览型号BUF04701AIPWR的Datasheet PDF文件第11页浏览型号BUF04701AIPWR的Datasheet PDF文件第12页 
RAIL-TO-RAIL OUTPUT  
VDC  
A class AB output stage with common-source transistors is  
used to achieve rail-to-rail output. This output stage is ca-  
pable of driving 1kΩ loads connected to any point between  
V+ and V–. For light resistive loads (> 100kΩ), the output  
voltage can swing to 100mV from the supply rail. With 2kΩ  
resistive loads, the output is specified to swing to within  
200mV of the supply rails while maintaining high open-loop  
gain (see the typical characteristic curve Output Voltage  
Swing vs Output Current).  
GMA1  
RS  
20Ω  
GMA2  
GMA3  
GMA4  
1/4  
BUF04701  
CL  
100nF  
RS  
20Ω  
1/4  
BUF04701  
GMA5  
GMA6  
CL  
100nF  
CAPACITIVE LOAD AND STABILITY  
The BUF04701 can drive up to 1000pF pure capacitive load.  
One method of improving capacitive load drive is to insert a  
10 to 20Ω resistor in series with the output, as shown in  
Figure 5. This reduces ringing with large capacitive loads  
while maintaining DC accuracy.  
RS  
20Ω  
GMA7  
GMA8  
GMA9  
1/4  
BUF04701  
CL  
100nF  
20Ω  
1/4  
RS  
20Ω  
VIN  
VOUT  
BUF04701  
1/4  
BUF04701  
GMA10  
CL  
100nF  
LCD Source Driver  
FIGURE 5. Improving Capacitive Load Drive.  
FIGURE 6. BUF04701 as LCD Display Buffer.  
APPLICATION CIRCUITS  
REFERENCE BUFFER FOR LCD SOURCE DRIVERS  
output performance is required for the upper and lower buffer.  
The ability of the BUF04701 to operate on 12V supplies, to  
drive heavy resistive loads (as low as 2kΩ), and to swing to  
within 200mV of the supply rails, makes it very well suited as  
a buffer for the reference voltage inputs of LCD source drivers.  
In modern high-resolution TFT-LCD displays, gamma correc-  
tion must be performed to correct for nonlinearities in the glass  
transmission characteristics of the LCD panel. The typical LCD  
source driver for 64 bits of grayscale uses internal Digital-to-  
Analog Converters (DACs) to convert the 6-bit data into analog  
voltages applied to the LCD. These DACs typically require  
external voltage references for proper operation. Normally  
these external reference voltages are generated using a simple  
resistive ladder, like the one shown in Figure 6.  
During conversion of the DAC, internal switches create  
current glitches on the output of the reference buffer. The  
capacitor CL (typically 100nF) functions as a charge reservoir  
that provides/absorbs most of the glitch energy. The series  
resistor RS isolates the outputs of the BUF04701 from the  
heavy capacitive load and helps to improve settling time.  
Typical laptop or desktop LCD panels require 6 to 8 of the  
source driver circuits in parallel to drive all columns of the  
panel. Although the resistive load of one internal string of a  
DAC is only around 10kΩ to 16kΩ, 6 to 8 strings in parallel  
represent a very substantial load. The power supply used for  
the LCD source drivers for laptops is typically in the order of  
10V. To maximize the dynamic range of the DAC, rail-to-rail  
4-POLE LOW-PASS SALLEN-KEY FILTER  
The high open-loop gain and wide bandwidth of the BUF04701  
make it optimal for active filtering applications. Figure 7 shows  
the BUF04701 in a 4-pole Butterworth low-pass active filter  
configuration of 20kHz bandwidth.  
2.2nF  
6.8nF  
2.18kΩ  
19.4kΩ  
1.68kΩ  
16.8kΩ  
1/4  
1/4  
VOUT  
VIN  
BUF04701  
BUF04701  
680pF  
330pF  
FIGURE 7. BUF04701 Configured as a 4-Pole Sallen-Key Butterworth Low-Pass Filter.  
BUF04701  
9
SBOS214B  
www.ti.com  
1...678910111213

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