参数资料
| 型号： | AD8072ARMZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP VIDEO DUAL 8MSOP |
| 标准包装： | 50 |
| 应用： | 电流反馈 |
| 电路数： | 2 |
| -3db带宽： | 100MHz |
| 转换速率： | 500 V/µs |
| 电流 - 电源： | 3.5mA |
| 电流 - 输出 / 通道： | 30mA |
| 电压 - 电源，单路/双路(±)： | 5 V ~ 12 V，±2.5 V ~ 6 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
REV. D
AD8072/AD8073
–9–
APPLICATIONS
Overdrive Recovery
Overdrive of an amplifier occurs when the output and/or input
range are exceeded. The amplifier must recover from this overdrive
condition and resume normal operation. As shown in Figure 4,
the AD8072 and AD8073 recover within 75 ns from positive
overdrive and 30 ns from negative overdrive.
25ns
1V
VIN
VOUT
Figure 4. Overload Recovery; VS =
±5 V, VIN = 8 V p-p,
RF = 1 k
, RL = 150 , G = +2
Bandwidth vs. Feedback Resistor Value
The closed-loop frequency response of a current feedback amplifier
is a function of the feedback resistor. A smaller feedback resistor
will produce a wider bandwidth response. However, if the feed-
back resistance becomes too small, the gain flatness can be
affected. As a practical consideration, the minimum value of
feedback resistance for the AD8072/AD8073 was found to be
649
. For resistances below this value, the gain flatness will be
affected and more significant lot-to-lot variations in device per-
formance will be noticed. Figure 5 shows a plot of the frequency
response of an AD8072/AD8073 at a gain of two with both feed-
back and gain resistors equal to 649
.
FREQUENCY – MHz
6.1
GAIN
FLATNESS
–
dB
6.0
0.1
500
1
10
100
5.9
5.8
5.4
5.7
5.6
5.5
RF = 2k
RF = 649
1 dB
DIV
0.1 dB
DIV
6
7
5
4
3
2
1
0
VS = 5V
AV = 2
RL = 150
VO = 0.2V p-p
CLOSED-LOOP
GAIN
–
dB
Figure 5. Frequency Response vs. RF
On the other hand, the bandwidth of a current feedback ampli-
fier can be decreased by increasing the feedback resistance. This
can sometimes be useful where it is desired to reduce the noise
bandwidth of a system. As a practical matter, the maximum
value of feedback resistor was found to be 2 k
. Figure 5 shows
the frequency response of an AD8072/AD8073 at a gain of two
with both feedback and gain resistors equal to 2 k
.
Capacitive Load Drive
When an op amp output drives a capacitive load, extra phase shift
due to the pole formed by the op amp’s output impedance and
the capacitor can cause peaking or even oscillation. The top trace
of Figure 6, RS = 0
, shows the output of one of the amplifiers of
the AD8072/AD8073 when driving a 50 pF capacitor as shown in
the schematic of Figure 7.
The amount of peaking can be significantly reduced by adding
a resistor in series with the capacitor. The lower trace of Figure 6
shows the same capacitor being driven with a 25
resistor
in series with it. In general, the resistor value will have to be
experimentally determined, but 10
to 50 is a practical range
of values to experiment with for capacitive loads of up to a few
hundred pF.
20ns
50mV
RS = 0
RS = 25
Figure 6. Capacitive Low Drive
1k
50
VIN = 100mV p-p
RL
1k
CL
50pF
RS
Figure 7. Capacitive Load Drive Circuit
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| AD8072ARMZ-REEL | 功能描述:IC OPAMP VIDEO DUAL 8MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
| AD8072ARMZ-REEL7 | 功能描述:IC OPAMP VIDEO DUAL 8MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 标准包装:1,000 系列:- 应用:驱动器 输出类型:差分 电路数:3 -3db带宽:350MHz 转换速率:1000 V/µs 电流 - 电源:14.5mA 电流 - 输出 / 通道:60mA 电压 - 电源，单路/双路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安装类型:表面贴装 封装/外壳:20-VFQFN 裸露焊盘 供应商设备封装:20-QFN 裸露焊盘（4x4） 包装:带卷 (TR) |
| AD8072JN | 制造商:Rochester Electronics LLC 功能描述:PDIP LOW COST DUAL VIDEO AMPLIFIER - Bulk 制造商:Analog Devices 功能描述:VIDEO AMP DUAL LOW COST 8072 DIP8 |
| AD8072JNZ | 功能描述:IC OPAMP VIDEO DUAL 8DIP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 视频放大器和频缓冲器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:TFT-LCD 面板：VCOM 驱动器 输出类型:满摆幅 电路数:1 -3db带宽:35MHz 转换速率:40 V/µs 电流 - 电源:3.7mA 电流 - 输出 / 通道:1.3A 电压 - 电源，单路/双路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 供应商设备封装:8-uMax-EP 包装:管件 |
| AD8072JR | 制造商:Analog Devices 功能描述:OP Amp Dual Current Fdbk 制造商:Rochester Electronics LLC 功能描述:SOIC LOW COST DUAL VIDEO AMPLIFIER - Bulk |
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