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ADD8709WSTZ-REEL7

更新时间： 2024-01-11 14:38:23
品牌 Logo 应用领域
罗彻斯特 - ROCHESTER 放大器
页数 文件大小 规格书
17页 1510K
描述
18 BUFFER AMPLIFIER, PQFP48, LEAD FREE, MO-026-BBC, LQFP-48

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中文翻译

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ADD8709WSTZ-REEL7 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：QFP
包装说明：LFQFP,针数：48
Reach Compliance Code：unknown风险等级：5.72
放大器类型：BUFFER最大平均偏置电流 (IIB)：1.5 µA
标称带宽 (3dB)：4.5 MHz最大输入失调电压：15000 µV
JESD-30 代码：S-PQFP-G48JESD-609代码：e3
长度：7 mm湿度敏感等级：3
功能数量：18端子数量：48
最高工作温度：105 °C最低工作温度：-40 °C
最小输出电流：0.15 A封装主体材料：PLASTIC/EPOXY
封装代码：LFQFP封装形状：SQUARE
封装形式：FLATPACK, LOW PROFILE, FINE PITCH峰值回流温度（摄氏度）：260
认证状态：COMMERCIAL座面最大高度：1.6 mm
标称压摆率：6 V/us子类别：Buffer Amplifier
供电电压上限：18 V标称供电电压 (Vsup)：16 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：MATTE TIN端子形式：GULL WING
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：40宽度：7 mm
Base Number Matches：1

ADD8709WSTZ-REEL7 数据手册

 浏览型号ADD8709WSTZ-REEL7的Datasheet PDF文件第8页浏览型号ADD8709WSTZ-REEL7的Datasheet PDF文件第9页浏览型号ADD8709WSTZ-REEL7的Datasheet PDF文件第10页浏览型号ADD8709WSTZ-REEL7的Datasheet PDF文件第12页浏览型号ADD8709WSTZ-REEL7的Datasheet PDF文件第13页浏览型号ADD8709WSTZ-REEL7的Datasheet PDF文件第14页 
ADD8709  
APPLICATION NOTES  
The ADD8709 is a gamma reference generator that allows  
source drivers to be optimized for the different combinations  
of liquid crystals, glass sizes, etc. in large LCD panels.  
MAXIMUM POWER DISSIPATION  
The maximum safe power dissipation in the ADD8709 package  
is limited by the associated rise in junction temperature (TJ) on  
the die. At approximately 150°C, the glass transition temper-  
ature, the properties of the plastic change. Even temporarily  
exceeding this temperature limit may change the stresses that  
the package exerts on the die, permanently shifting the para-  
metric performance of the ADD8709. Exceeding a junction  
temperature of 175°C for an extended period can result in  
changes in the silicon devices, potentially causing failure.  
In a typical panel application, the selected source drivers have  
an internal gamma curve that is not ideal for the specific panel,  
as shown in Figure 19. The ADD8709 allows the gamma curve  
in the source drivers to be adjusted appropriately, and also  
ensures that all of the source drivers have the same gamma  
curve.  
16  
14  
12  
10  
OPERATING TEMPERATURE RANGE  
The junction temperature is  
TJ = TAMB + θJA × PDIS  
where:  
T
AMB = ambient temperature.  
θJA = junction-to-ambient thermal resistance, in °C/watt.  
DIS = power dissipated in the device, in watts.  
8
ORIGINAL GAMMA CURVE  
IN SOURCE DRIVERS  
6
P
PANEL GAMMA CURVE  
CORRECTED BY ADD8709  
4
For the ADD8709, PDIS can be calculated by  
DIS = VDD × IDQ + Σ(IOUT X(+) × (VDD − VOUT X)) +  
Σ(−IOUT X(-) × VOUTX) + (VDD – VREG OUT) × ILOAD  
where:  
DD × IDQ = nominal system power requirements.  
OUT X(+) × (VDD − VOUT X) = positive-current amplifier load power  
dissipation (current comes from VDD).  
−IOU XT(-) × VOUT X = negative-current amplifier load power  
dissipation (current goes to GND).  
2
P
0
GAMMA REFERENCE INPUT POINTS  
V
I
Figure 19. Original and Corrected Gamma Curves  
The ADD8709 also includes a low dropout linear regulator to  
provide a stable reference level for the gamma curve for best  
panel performance.  
(VDD – VREG OUT) × ILOAD = regulator load power dissipation.  
VOLTAGE REGULATOR  
Example 1  
The on-board voltage regulator provides a regulated voltage to  
the external resistors to set different gamma voltages.  
To calculate an estimated power consumption of the ADD8709  
assume:  
The output of the regulator is set by the two resistors, R1 and R2,  
and an internal reference voltage of 1.2V. In the ADD8709, R1  
and R2 are external components. The output voltage can is  
found by  
V
DD × IDQ = 16 V × 15 mA = 0.240 W.  
(VDD – VREG OUT) × ILOAD = (16 V – 14.4 V) × 5 mA = 0.008 W.  
VREG OUT = VREF × (R2/R1 + 1)  
R
2
55kΩ  
R
1
5kΩ  
V
REG OUT  
+
–
V
1.2V  
REF  
Figure 20. Voltage Regulator  
Rev. A | Page 10 of 16  
 
 
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