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| 型号： | AD8515ARTZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP GP R-R CMOS 5MHZ SOT23-5 |
| 设计资源： | Extending the Capacitive Input Range of AD7745/AD7746 (CN0129) |
| 标准包装： | 1 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 2.7 V/µs |
| 增益带宽积： | 5MHz |
| 电流 - 输入偏压： | 5pA |
| 电压 - 输入偏移： | 1000µV |
| 电流 - 电源： | 410µA |
| 电流 - 输出 / 通道： | 20mA |
| 电压 - 电源，单路/双路(±)： | 1.8 V ~ 5 V |
| 工作温度： | -40°C ~ 125°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： | 标准包装 |
| 产品目录页面： | 766 (CN2011-ZH PDF) |
| 其它名称： | AD8515ARTZREEL7DKR |
AD8515
Rev. D | Page 15 of 16
WIEN BRIDGE OSCILLATOR
The circuit in Figure 38 can be used to generate a sine wave, one
of the most fundamental waveforms. Known as a Wien Bridge
oscillator, it has the advantage of requiring only one low power
amplifier. This is an important consideration, especially for battery-
operated applications where power consumption is a critical issue.
To keep the equations simple, the resistor and capacitor values
used are kept equal. For the oscillation to happen, two conditions
have to be met. First, there should be a zero phase shift from the
input to the output, which happens at the oscillation frequency of
C10
R10
f
OSC
×
π
=
2
1
Second, at this frequency, the ratio of VOUT to the voltage at the
positive input (+IN, Pin 3) has to be 3, which means that the
ratio of R11:R12 should be greater than 2.
0
30
24
-0
38
C10
1nF
C9
1nF
R19
1k
VEE
VCC
R13
1k
R12
1k
1
AD8515
3
2
U10
V+
V–
+
–
R11
2.05k
Figure 38. Low Power Wien Bridge Oscillator
High frequency oscillators can be built with the AD8515,
due to its wide bandwidth. Using the values shown, an oscilla-
tion frequency of 130 kHz is created and is shown in Figure 39.
If R11 is too low, the oscillation might converge; if too large,
the oscillation diverges until the output clips (VS = ±2.5 V,
fOSC = 130 kHz).
030
24
-03
9
VO
L
T
A
G
E
(2
V/
D
IV
)
Figure 39. Output of Wien Bridge Oscillator
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8517 | 制造商:AD 制造商全称:Analog Devices 功能描述:7 MHz Rail-to-Rail Low Voltage Operational Amplifiers |
| AD8517ART-R2 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R I/O 6V 5-Pin SOT-23 T/R 制造商:Rochester Electronics LLC 功能描述:SINGLE, LOW PWR RAIL/RAIL OP AMP - Bulk |
| AD8517ART-REEL | 制造商:AD 制造商全称:Analog Devices 功能描述:7 MHz Rail-to-Rail Low Voltage Operational Amplifiers |
| AD8517ART-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R I/O 6V 5-Pin SOT-23 T/R 制造商:Rochester Electronics LLC 功能描述:SINGLE, LOW PWR RAIL/RAIL OP AMP - Tape and Reel |
| AD8517ARTZ-R2 | 制造商:Analog Devices 功能描述:OP Amp Single GP R-R I/O 6V 5-Pin SOT-23 T/R |
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