参数资料
| 型号： | AD841SE |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 40MHZ 50MA 20CLCC |
| 标准包装： | 1 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 转换速率： | 300 V/µs |
| 增益带宽积： | 40MHz |
| 电流 - 输入偏压： | 3.5µA |
| 电压 - 输入偏移： | 500µV |
| 电流 - 电源： | 11mA |
| 电流 - 输出 / 通道： | 50mA |
| 电压 - 电源，单路/双路(±)： | ±5 V ~ 18 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-CLCC |
| 供应商设备封装： | 20-LCCC |
| 包装： | 管件 |
Data Sheet
AD841
Rev. C | Page 11 of 16
Figure 31 shows the long-term stability of the settling charac-
teristics of the AD841 output after a 10 V step. There is no
evidence of settling tails after the initial transient recovery
time. The use of a junction isolated process, together with
careful layout, avoids these problems by minimizing the effects
of transistor isolation capacitance discharge and thermally
induced shifts in circuit operating points. These problems
do not occur even under high output current conditions.
Figure 31. AD841 Settling Demonstrating No Settling Tails
GROUNDING AND BYPASSING
In designing practical circuits with the AD841, the user must
remember that whenever high frequencies are involved, some
special precautions are in order. Circuits must be built with
short interconnect leads. Large ground planes should be used
whenever possible to provide a low resistance, low inductance
circuit path, as well as minimizing the effects of high frequency
coupling. Avoid sockets because the increased interlead
capacitance can degrade bandwidth.
Feedback resistors should be of low enough value to assure that
the time constant formed with the circuit capacitances will not
limit the amplifier performance. Resistor values of less than
5 kΩ are recommended. If a larger resistor must be used, a
small (<10 pF) feedback capacitor in parallel with the feed-
back resistor, RF, may be used to compensate for these stray
capacitances and optimize the dynamic performance of the
amplifier in the particular application.
Bypass power supply leads to ground as close as possible to
the amplifier pins. A 2.2 F capacitor in parallel with a 0.1 F
ceramic disk capacitor is recommended.
CAPACITIVE LOAD DRIVING ABILITY
Like all wideband amplifiers, the AD841 is sensitive to capaci-
tive loading. The AD841 is designed to drive capacitive loads
of up to 20 pF without degradation of its rated performance.
Capacitive loads of greater than 20 pF will decrease the dynamic
performance of the part although instability should not occur
unless the load exceeds 100 pF (for a unity-gain follower). A
resistor in series with the output can be used to decouple larger
capacitive loads.
Figure 32 shows a typical configuration for driving a large
capacitive load. The 51 Ω output resistor effectively isolates the
high frequency feedback from the load and stabilizes the circuit.
Low frequency feedback is returned to the amplifier summing
junction via the low-pass filter formed by the 51 Ω resistor and
the load capacitance, CL.
Figure 32. Circuit for Driving a Large Capacitive Load
100
90
10
0%
500ns
OUTPUT ERROR:
0.02%/DIV
OUTPUT:
5V/DIV
1
1340-
031
11
6
4
5
10
–
+
AD841
+VS
–VS
2.2F
0.1F
2.2F
0.1F
499
1k
15pF
1k
INPUT
51
CL
RL
VOUT
1
1340-
032
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD841SE/883B | 功能描述:高速运算放大器 FAST SETTLING H.S. OP AMP RoHS:否 制造商:Texas Instruments 通道数量:1 电压增益 dB:116 dB 输入补偿电压:0.5 mV 转换速度:55 V/us 工作电源电压:36 V 电源电流:7.5 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube 产品: |
| AD841SEZ | 制造商:Analog Devices 功能描述:OP Amp Single GP ±18V 20-Pin LCC |
| AD841SH | 制造商:Analog Devices 功能描述:OP Amp Single GP 制造商:Rochester Electronics LLC 功能描述:FAST SETTLING H.S. OP AMP - Bulk |
| AD841SH/883B | 制造商:Analog Devices 功能描述:OP Amp Single GP 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD841SHZ | 制造商:Analog Devices 功能描述:OP Amp Single GP 制造商:Analog Devices 功能描述:OP Amp Single GP ±18V 12-Pin TO-8 |
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