参数资料
| 型号： | AD8067ART-R2 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/25页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP VF R-R PREC LN SOT23-5 |
| 标准包装： | 1 |
| 系列： | FastFET™ |
| 放大器类型： | 电压反馈 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 640 V/µs |
| -3db带宽： | 54MHz |
| 电流 - 输入偏压： | 0.6pA |
| 电压 - 输入偏移： | 200µV |
| 电流 - 电源： | 6.6mA |
| 电流 - 输出 / 通道： | 26mA |
| 电压 - 电源，单路/双路(±)： | 5 V ~ 24 V，±2.5 V ~ 12 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 剪切带 (CT) |
| 其它名称： | AD8067ART-R2CT |
AD8067
Data Sheet
Rev. B | Page 14 of 24
For inverting voltage gain applications, the source impedance of
the input signal must be considered because it sets the application’s
noise gain as well as the apparent closed-loop gain. The basic
frequency equation for inverting applications is
S
G
F
S
G
R
GBP
equency
p –3 dB Fr
Closed-Loo
)
(
S
G
F
R
Gain
DC
–
where GBP is the gain bandwidth product of the amplifier, and
RS is the signal source resistance.
S
G
S
G
F
R
Gain
Noise
ion
Configurat
Inverting
It is important that the noise gain for inverting applications be
kept above 6 for stability reasons. If the signal source driving
the inverter is another amplifier, take care that the driving
amplifier shows low output impedance through the frequency
span of the expected closed-loop bandwidth of the AD8067.
RESISTOR SELECTION FOR WIDEBAND OPERATION
Voltage feedback amplifiers can use a wide range of resistor
values to set their gain. Proper design of the application’s
feedback network requires consideration of the following issues:
Poles formed by the amplifier’s input capacitances with the
resistances seen at the amplifier’s input terminals
Effects of mismatched source impedances
Resistor value impact on the application’s output
voltage noise
Amplifier loading effects
The AD8067 has common-mode input capacitances (CM) of
1.5 pF and a differential input capacitance (CD) of 2.5 pF. This is
illustrated in Figure 43. The source impedance driving the
positive input of a noninverting buffer forms a pole primarily
with the amplifier’s common-mode input capacitance as well as
any parasitic capacitance due to the board layout (CPAR). This
limits the obtainable bandwidth. For G = +10 buffers, this
bandwidth limit becomes apparent for source impedances >1 kΩ.
VI
RS
SIGNAL SOURCE
–
+
–
+
VOUT
–
+
CPAR
RG
CD
CM
RF
Figure 43. Input and Board Capacitances
There is a pole in the feedback loop response formed by
the source impedance seen by the amplifier’s negative input
(RG RF) and the sum of the amplifier’s differential input
capacitance, common-mode input capacitance, and any board
parasitic capacitance. This decreases the loop phase margin and
can cause stability problems, that is, unacceptable peaking and
ringing in the response. To avoid this problem, it is recommended
that the resistance at the AD8067’s negative input be kept below
200 Ω for all wideband voltage gain applications.
Matching the impedances at the inputs of the AD8067 is also
recommended for wideband voltage gain applications. This
minimizes nonlinear common-mode capacitive effects that can
significantly degrade settling time and distortion performance.
The AD8067 has a low input voltage noise of 6.6 nV/Hz.
Source resistances greater than 500 Ω at either input terminal
notably increases the apparent referred-to-input (RTI) voltage
noise of the application.
The amplifier must supply output current to its feedback
network, as well as to the identified load. For instance, the
load resistance presented to the amplifier in Figure 40 is
RLOAD
(RF + RG). For an RLOAD of 100 Ω, RF of 1 kΩ, and RG of
100 Ω, the amplifier is driving a total load resistance of about
92 Ω. This becomes more of an issue as RF decreases. The
AD8067 is rated to provide 30 mA of low distortion output
current. Heavy output drive requirements also increase the
part’s power dissipation and should be taken into account.
相关PDF资料 |
PDF描述 |
|---|---|
| 3413.0222.24 | FUSE 4A 63V 1206 FAST |
| 3413.0221.26 | FUSE 3.15A 63V 1206 FAST |
| AD8039ART-REEL7 | IC OPAMP VF DUAL LP LN SOT23-8 |
| 3413.0221.24 | FUSE 3.15A 63V 1206 FAST |
| 3413.0220.26 | FUSE 2.5A 63V 1206 FAST |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8067ART-REEL | 制造商:Analog Devices 功能描述:OP AMP SGL VOLT FDBK R-R O/P 12V/24V 5PIN SOT-23 - Tape and Reel |
| AD8067ART-REEL7 | 功能描述:IC OPAMP VF R-R PREC LN SOT23-5 RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:FastFET™ 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:带卷 (TR) |
| AD8067ARTZ-R2 | 功能描述:IC OPAMP VF R-R PREC LN SOT23-5 RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:FastFET™ 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:带卷 (TR) |
| AD8067ARTZ-R2 | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD8067ARTZ-REEL | 功能描述:IC OPAMP VF R-R PREC LN SOT23-5 RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:FastFET™ 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
发布紧急采购，3分钟左右您将得到回复。