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AD8004ARZ-14-REEL7

更新时间： 2024-02-07 06:46:26
品牌 Logo 应用领域
亚德诺 - ADI 放大器光电二极管
页数 文件大小 规格书
17页 460K
描述
3000 V/µS, 35mW Current Feedback Quad Amplifier

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中文翻译

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AD8004ARZ-14-REEL7 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SOP, SOP14,.25针数：14
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.31.00.01风险等级：5.21
放大器类型：OPERATIONAL AMPLIFIER架构：CURRENT-FEEDBACK
25C 时的最大偏置电流 (IIB)：110 µA标称共模抑制比：58 dB
频率补偿：YES最大输入失调电压：5000 µV
JESD-30 代码：R-PDSO-G14JESD-609代码：e3
长度：8.65 mm低-偏置：NO
低-失调：NO微功率：NO
湿度敏感等级：1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：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP14,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE包装方法：TAPE AND REEL
峰值回流温度（摄氏度）：260功率：NO
电源：5/+-5 V可编程功率：NO
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Operational Amplifier最大压摆率：20 mA
供电电压上限：6.3 V标称供电电压 (Vsup)：5 V
表面贴装：YES技术：BIPOLAR
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽带：YES宽度：3.9 mm
Base Number Matches：1

AD8004ARZ-14-REEL7 数据手册

 浏览型号AD8004ARZ-14-REEL7的Datasheet PDF文件第9页浏览型号AD8004ARZ-14-REEL7的Datasheet PDF文件第10页浏览型号AD8004ARZ-14-REEL7的Datasheet PDF文件第11页浏览型号AD8004ARZ-14-REEL7的Datasheet PDF文件第13页浏览型号AD8004ARZ-14-REEL7的Datasheet PDF文件第14页浏览型号AD8004ARZ-14-REEL7的Datasheet PDF文件第15页 
AD8004  
2
0
through R2. This current flows toward the summing junction  
and requires that the output be 2 V higher than the summing  
junction or at 3.6 V.  
G = +2, R = 1.10kꢂ  
F
C
= 10pF  
L
2
0
–2  
–4  
–6  
–8  
–10  
–12  
C
= 0  
L
G = –2, R = 698ꢂ  
F
When the input is at 1 V, there is 1.2 mA flowing into the sum-  
ming junction through R3 and 1.2 mA flowing out through R1.  
These currents balance and leave no current to flow through  
R2. Thus the output is at the same potential as the inverting  
input or 1.6 V.  
–2  
C
= 10pF  
L
–4  
V
= 50mV  
IN  
–6  
ꢁ5V  
S
R
= 100ꢂ  
L
C
= 0  
The input of the AD876 has a series MOSFET switch that turns  
on and off at the sampling rate. This MOSFET is connected to  
a hold capacitor internal to the device. The on impedance of the  
MOSFET is about 50 Ω, while the hold capacitor is about 5 pF.  
L
–8  
–14  
–10  
–12  
–14  
In a worst case condition, the input voltage to the AD876 will  
change by a full-scale value (2 V) in one sampling cycle. When  
the input MOSFET turns on, the output of the op amp will be  
connected to the charged hold capacitor through the series  
resistance of the MOSFET. Without any other series resistance,  
the instantaneous current that flows would be 40 mA. This  
would cause settling problems for the op amp.  
1
10  
40  
100  
500  
FREQUENCY – MHz  
Figure 10. Frequency Response vs. Capacitive Loading,  
RL = 100 Ω Output  
2
C
= 10pF  
L
0
–2  
The series 100 Ω resistor limits the current that flows instanta-  
neously after the MOSFET turns on to about 13 mA. This  
resistor cannot be made too large or the high frequency perfor-  
mance will be affected.  
G = +2  
= 1kꢂ  
R
L
ꢁ5V  
S
–4  
V
= 50mV rms  
IN  
C
= 0  
R
= 1.2kꢂ  
L
F
–6  
The sampling MOSFET of the AD876 is closed for only half of  
each cycle or for 25 ns. Approximately seven time constants are  
required for settling to 10 bits. The series 100 Ω resistor along  
with the 50 Ω on resistance and the hold capacitor, create a  
750 ps time constant. These values leave a comfortable margin  
for settling. Obtaining the same results with the op amp A/D  
combination as compared to driving with a signal generator  
indicates that the op amp is settling fast enough.  
–8  
–10  
–12  
–14  
1
10  
40  
100  
500  
FREQUENCY – MHz  
Overall the AD8004 provides adequate buffering for the AD876  
A/D converter without introducing distortion greater than that  
of the A/D converter by itself.  
Figure 11. Flatness with 10 pF Capacitive Load  
DRIVING A SINGLE-SUPPLY A/D CONVERTER  
New CMOS A/D converters are placing greater demands on the  
amplifiers that drive them. Higher resolutions, faster conversion  
rates, and input switching irregularities require superior settling  
characteristics. In addition, these devices run off a single +5 V  
supply and consume little power, so good single-supply operation  
with low power consumption is very important. The AD8004 is  
well positioned for driving this new class of A/D converters.  
+5V  
R3  
R2  
1kꢂ  
1.65kꢂ  
0.1ꢃF  
10ꢃF  
3.6V  
0.1ꢃF  
+3.6V  
REFT  
R1  
499kꢂ  
V
IN  
1V  
0V  
100ꢂ  
1/4  
AD8004  
50ꢂ  
Figure 12 shows a circuit that uses an AD8004 to drive an  
AD876, a single supply, 10-bit, 20 MSPS A/D converter that  
requires only 140 mW. Using the AD8004 for level shifting and  
driving, the A/D exhibits no degradation in performance com-  
pared to when it is driven from a signal generator.  
AD876  
3.6V  
1.6V  
REFB  
+1.6V  
0.1ꢃF  
1.6V  
Figure 12. AD8004 Driving the AD876  
The analog input of the AD876 spans 2 V centered at about  
2.6 V. The resistor network and bias voltages provide the level  
shifting and gain required to convert the 0 V to 1 V input signal  
to a 3.6 V to 1.6 V range that the AD876 wants to see.  
LAYOUT CONSIDERATIONS  
The specified high speed performance of the AD8004 requires  
careful attention to board layout and component selection.  
Table I shows the recommended component values for the  
AD8004 and Figures 14–16 show the layout for the AD8004  
evaluation board (14-lead SOIC). Proper RF design techniques  
and low parasitic component selection are mandatory.  
Biasing the noninverting input of the AD8004 at 1.6 V dc forces  
the inverting input to be at 1.6 V dc for linear operation of the  
amplifier. When the input is at 0 V, there is 3.2 mA flowing out  
of the summing junction via R1 (1.6 V/499 Ω). R3 has a current  
of 1.2 mA flowing into the summing junction (3.6 V – 1.6 V)/  
1.65 kΩ. The difference of these two currents (2 mA) must flow  
REV. D  
–11–  
1...9101112131415...17

中文翻译

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AD8004ARZ-14-REEL7 替代型号

型号 品牌 替代类型 描述 数据表
AD8004ARZ-14 ADI

类似代替

 		3000 V/µS, 35mW Current Feedback Quad Amplifier
AD8004AR-14-REEL ADI

完全替代

 		Quad 3000 V/us, 35 mW Current Feedback Amplifier

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