参数资料
| 型号： | AD823AR |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP JFET R-R DUAL LN 8SOIC |
| 标准包装： | 98 |
| 放大器类型： | J-FET |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 25 V/µs |
| -3db带宽： | 16MHz |
| 电流 - 输入偏压： | 5pA |
| 电压 - 输入偏移： | 700µV |
| 电流 - 电源： | 7mA |
| 电流 - 输出 / 通道： | 17mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 36 V，±1.5 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： | 管件 |
Data Sheet
AD823
Rev. E | Page 17 of 20
Second-Order Low-Pass Filter
Figure 43 depicts the AD823 configured as a second-order
Butterworth low-pass filter. With the values as shown, the
corner frequency equals 200 kHz. Component selection is
shown in the following equations:
R1 = R2 = User Selected (Typical Values: 10 kΩ to 100 kΩ)
R1
f
.
farads
C1
cutoff
2π
414
1
R1
f
C2
cutoff
2π
707
.
0
1/2
AD823
C3
0.1F
+5V
C4
VOUT
VIN
C1
28pF
–5V
C2
56pF
R1
20k
R2
20k
50pF
00
90
1-
04
3
Figure 43. Second-Order Low-Pass Filter
A plot of the filter is shown in Figure 44; better than 50 dB of
high frequency rejection is provided.
FREQUENCY (Hz)
–40
HI
G
H
F
R
E
Q
UE
NC
Y
RE
JE
CT
IO
N
(
d
B)
1k
–50
–30
–60
0
–20
10k
100k
1M
10M
100M
–10
VDB – VOUT
00
90
1-
04
4
Figure 44. Frequency Response of Filter
Single-Supply Half-Wave and Full-Wave Rectifiers
An AD823 configured as a unity-gain follower and operated
with a single supply can be used as a simple half-wave rectifier.
The AD823 inputs maintain picoamp level input currents even
when driven well below the minus supply. The rectifier puts
that behavior to good use, maintaining an input impedance of
over 1011 Ω for input voltages from within 1 V of the positive
supply to 20 V below the negative supply.
The full-wave and half-wave rectifier shown in Figure 45
operates as follows: when VIN is above ground, R1 is boot-
strapped through the unity-gain follower A1 and the loop of
Amplifier A2. This forces the inputs of A2 to be equal, thus no
current flows through R1 or R2, and the circuit output tracks
the input. When VIN is below ground, the output of A1 is forced
to ground. The noninverting input of Amplifier A2 sees the
ground level output of A1; therefore, A2 operates as a unity-
gain inverter. The output at Node C is then a full-wave rectified
version of the input. Node B is a buffered half-wave rectified
version of the input. Input voltage supply to ±18 V can be
rectified, depending on the voltage supply used.
3
2
1
8
4
0.01F
VIN
+VS
1/2
AD823
HALF-WAVE
RECTIFIED OUTPUT
FULL-WAVE
RECTIFIED OUTPUT
A1
R2
100k
R1
100k
6
5
7
1/2
AD823
A2
A
B
C
A2
00
90
1-
04
4
Figure 45. Full-Wave and Half-Wave Rectifier
100
A
B
C
2V
200s
2V
10
0%
00
90
1-
04
6
90
Figure 46. Single-Supply Half-Wave and Full-Wave Rectifier
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD823AR | 制造商:Analog Devices 功能描述:SEMICONDUCTORS LINEAR |
| AD823AR-EBZ | 功能描述:放大器 IC 开发工具 AD823AR-EBZ_A00676_EB-O8R-2Z 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 |
| AD823AR-REEL | 功能描述:IC OPAMP JFET R-R DUAL LN 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD823AR-REEL7 | 功能描述:IC OPAMP JFET R-R DUAL LN 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 |
| AD823ARZ | 功能描述:IC OPAMP JFET R-R DUAL LN 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
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