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參數(shù)資料
| 型號(hào)： | AD8067ART |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Gain Bandwidth Product Precision Fast FET⑩ Op Amp |
| 中文描述： | 高增益帶寬積精密高速運(yùn)算放大器場(chǎng)效應(yīng)⑩ |
| 文件頁數(shù)： | 22/24頁 |
| 文件大?。?/td> | 873K |
| 代理商： | AD8067ART |
AD8067
Rev. 0 | Page 22 of 24
M 50ns CH1 288mV
CH1
200mV
CH2
200mV
T
V
IN
V
OUT
Reference network:
(
)
2
C
3
2
2
1
||
3
R
R
Bandwidth
dB
V
REF
+
π
=
Resistors R4 and R1 set the gain, in this case an inverting gain of 10
was selected. In this application, the input and output bandwidths
were set for approximately 10 Hz. The reference network was set for
a tenth of the input and output bandwidth, at approximately 1 Hz.
AD8067
C4
0.1
μ
F
C3
10
μ
F
+5V
R4
2.7k
R1
300
R3
30k
R2
70k
R
L
1k
C5
15
μ
F
V
OUT
1
2
3
4
5
V
IN
C1
47
μ
F
C2
6.8
μ
F
+5V
Figure 55. Gain of 2 Pulse Response
Single-Supply Operation
The AD8067 is well suited for low voltage single-supply
applications, given its N-channel JFET input stage and rail-to-rail
output stage. It is fully specified for 5 V supplies. Successful single-
supply applications require attention to keep signal voltages within
the input and output headroom limits of the amplifier. The input
stage headroom extends to 1.7 V (minimum) on a 5 V supply. The
center of the input range is 0.85 V. The output saturation limit
defines the hard limit of the output headroom. This limit depends
on the amount of current the amplifier is sourcing or sinking, as
shown in Figure 29.
Figure 56. Single-Supply Operation Schematic
High Gain, High Bandwidth Composite
Amplifier
Traditionally, an offset voltage is introduced in the input network
replacing ground as a reference. This allows the output to swing
about a dc reference point, typically midsupply. Attention to the
required headroom of the amplifier is important, in this case the
required headroom from the positive supply is 3 V; therefore 1.5 V
was selected as a reference, which allows for a 100 mV signal at the
input. Figure 56 shows the AD8067 configured for 5 V supply
operation with a reference voltage of 1.5 V. Capacitors C1 and C5
ac-couple the signal into an out of the amplifier and partially
determine the bandwidth of the input and output structures.
The composite amplifier takes advantage of combining key
parameters that may otherwise be mutually exclusive of a
conventional single amplifier. For example, most precision
amplifiers have good dc characteristics but lack high speed ac
characteristics. Composite amplifiers combine the best of both
amplifiers to achieve superior performance over their single op
amp counterparts. The AD8067 and the AD8009 are well suited for
a composite amplifier circuit, combining dc precision with high
gain and bandwidth. The circuit runs off a
±
5 V power supply at
approximately 20 mA of bias current. With a gain of approximately
40 dB, the composite amplifier offers <1 pA input current, a gain
bandwidth product of 6.1 GHz, and a slew rate of 630 V/μsec.
1
1
2
1
R
3
C
Bandwidth
dB
–
V
INPUT
π
=
5
2
1
R
3
C
Bandwidth
dB
–
V
L
OUTPUT
π
=
Resistors R2 and R3 set a 1.5 V output bias point for the output
signal to swing about. It is critical to have adequate bypassing to
provide a good ac ground for the reference voltage. Generally the
bandwidth of the reference network (R2, R3, and C2) is selected to
be one tenth that of the input bandwidth. This ensures that any
frequencies below the input bandwidth do not pass through the
reference network into the amplifier.
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| 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 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:FastFET™ 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
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