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| 型号： | AD8027ARZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/25页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP R-R LDIST LN LP 8SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 电压反馈 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 100 V/µs |
| -3db带宽： | 190MHz |
| 电流 - 输入偏压： | 4µA |
| 电压 - 输入偏移： | 200µV |
| 电流 - 电源： | 6.5mA |
| 电流 - 输出 / 通道： | 120mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V，±1.35 V ~ 6 V |
| 工作温度： | -40°C ~ 125°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) |
AD8027/AD8028
Rev. C | Page 22 of 24
BAND-PASS FILTER
In communication systems, active filters are used extensively in
signal processing. The AD8027/AD8028 are excellent choices
for active filter applications. In realizing this filter, it is impor-
tant that the amplifier have a large signal bandwidth of at least
10× the center frequency, fO. Otherwise, a phase shift can occur
in the amplifier, causing instability and oscillations.
In Figure 62, the AD8027/AD8028 part is configured as a
1 MHz band-pass filter. The target specifications are fO = 1 MHz
and a 3 dB pass band of 500 kHz. To start the design, select fO,
Q, C1, and R4. Then use the following equations to calculate the
remaining variables:
(MHz)
Pass
Band
f
Q
O
=
k = 2πfOC1
C2 = 0.5C1
R1 = 2/k, R2 = 2/(3k), R3 = 4/k
H = 1/3(6.5 – 1/Q)
R5 = R4/(H – 1)
+5
–5
C3
0.1
μF
C4
0.1
μF
R4
523
Ω
R5
523
Ω
C2
500pF
C1
1000pF
R3
634
Ω
VOUT
R1
316
Ω
R2
105
Ω
VIN
SELECT
AD8027/
AD8028
+
–
03327-A-061
Figure 62. Band-Pass Filter Schematic
The test data shown in Figure 63 indicates that this design
yields a filter response with a center frequency of fO = 1 MHz,
and a bandwidth of 450 kHz.
0.1
CH1 S21 LOG
5dB/REF 6.342dB
1:6.3348dB 1.00 000MHz
1
FREQUENCY – MHz
10
1
03327-A-062
Figure 63. Band-Pass Filter Response
DESIGN TOOLS AND TECHNICAL SUPPORT
Analog Devices, Inc. (ADI) is committed to simplifying the
design process by providing technical support and online
design tools. ADI offers technical support via free evaluation
boards, sample ICs, interactive evaluation tools, data sheets,
spice models, application notes, and phone and email support
available at www. analog.com.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8028 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Distortion, High Speed Rail-to-Rail Input/Output Amplifiers |
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