参数资料
| 型号： | AD8001AQ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP CF LP LDIST 70MA 8CDIP |
| 标准包装： | 48 |
| 放大器类型： | 电流反馈 |
| 电路数： | 1 |
| 转换速率： | 1200 V/µs |
| -3db带宽： | 880MHz |
| 电流 - 输入偏压： | 5µA |
| 电压 - 输入偏移： | 2000µV |
| 电流 - 电源： | 5mA |
| 电流 - 输出 / 通道： | 70mA |
| 电压 - 电源，单路/双路(±)： | ±3 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-CDIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-CERDIP |
| 包装： | 管件 |
REV. D
AD8001
–11–
Printed Circuit Board Layout Considerations
As to be expected for a wideband amplifier, PC board parasitics
can affect the overall closed-loop performance. Of concern are
stray capacitances at the output and the inverting input nodes. If
a ground plane is to be used on the same side of the board as
the signal traces, a space (5 mm min) should be left around the
signal lines to minimize coupling. Additionally, signal lines
connecting the feedback and gain resistors should be short
enough so that their associated inductance does not cause high
frequency gain errors. Line lengths on the order of less than
5 mm are recommended. If long runs of coaxial cable are being
driven, dispersion and loss must be considered.
Power Supply Bypassing
Adequate power supply bypassing can be critical when optimiz-
ing the performance of a high frequency circuit. Inductance in
the power supply leads can form resonant circuits that produce
peaking in the amplifier’s response. In addition, if large current
transients must be delivered to the load, then bypass capacitors
(typically greater than 1
F) will be required to provide the best
settling time and lowest distortion. A parallel combination of
4.7
F and 0.1 F is recommended. Some brands of electrolytic
capacitors will require a small series damping resistor
≈4.7 for
optimum results.
DC Errors and Noise
There are three major noise and offset terms to consider in a
current feedback amplifier. For offset errors, refer to the equation
below. For noise error the terms are root-sum-squared to give a
net output error. In the circuit in Figure 7 they are input offset
(VIO), which appears at the output multiplied by the noise gain
of the circuit (1 + RF/RI), noninverting input current (IBN
× R
N)
also multiplied by the noise gain, and the inverting input current,
which when divided between RF and RI and subsequently
multiplied by the noise gain always appears at the output as
IBN
×RF. The input voltage noise of the AD8001 is a low 2 nV/
√Hz. At low gains though the inverting input current noise times
RF is the dominant noise source. Careful layout and device
matching contribute to better offset and drift specifications for
the AD8001 compared to many other current feedback ampli-
fiers. The typical performance curves in conjunction with the
following equations can be used to predict the performance of
the AD8001 in any application.
VV
R
IR
R
IR
OUT
IO
F
I
BN
N
F
I
BI
F
=×
+
±×
×
+
±×
11
RF
RI
RN
IBN
VOUT
IBI
Figure 7. Output Offset Voltage
Driving Capacitive Loads
The AD8001 was designed primarily to drive nonreactive loads.
If driving loads with a capacitive component is desired, best
frequency response is obtained by the addition of a small series
resistance, as shown in Figure 8. The accompanying graph
shows the optimum value for RSERIES versus capacitive load. It is
worth noting that the frequency response of the circuit when
driving large capacitive loads will be dominated by the passive
roll-off of RSERIES and CL.
909
RSERIES
RL
500
IN
CL
Figure 8. Driving Capacitive Loads
40
0
25
30
10
5
20
15
20
10
CL – pF
G = +1
R
SERIES
–
Figure 9. Recommended RSERIES vs. Capacitive Load
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| AD8001AR | 功能描述:IC OPAMP CF LP LDIST 70MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:150 系列:- 放大器类型:音频 电路数:2 输出类型:- 转换速率:5 V/µs 增益带宽积:12MHz -3db带宽:- 电流 - 输入偏压:100nA 电压 - 输入偏移:500µV 电流 - 电源:6mA 电流 - 输出 / 通道:50mA 电压 - 电源，单路/双路(±):4 V ~ 32 V，±2 V ~ 16 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:8-TSSOP 包装:管件 |
| AD8001AR-REEL | 功能描述:IC OPAMP CF LP LDIST 70MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:73 系列:Over-The-Top® 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.07 V/µs 增益带宽积:200kHz -3db带宽:- 电流 - 输入偏压:1nA 电压 - 输入偏移:285µV 电流 - 电源:50µA 电流 - 输出 / 通道:25mA 电压 - 电源，单路/双路(±):2 V ~ 44 V，±1 V ~ 22 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-WFDFN 裸露焊盘 供应商设备封装:16-DFN-EP（5x3） 包装:管件 |
| AD8001AR-REEL7 | 功能描述:IC OPAMP CF LP LDIST 70MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:13 V/µs 增益带宽积:3MHz -3db带宽:- 电流 - 输入偏压:65pA 电压 - 输入偏移:3000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD8001ART | 制造商:AD 制造商全称:Analog Devices 功能描述:800 MHz 50 mW Current Feedback Amplifier(222.93 k) |
| AD8001ART-EBZ | 功能描述:放大器 IC 开发工具 AD8001ART-EBZ_A00674_EB-O5/6RT-1Z RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
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