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| 型号： | AD823AARZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP FET RR 17MHZ DUAL 8SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | J-FET |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 35 V/µs |
| -3db带宽： | 19MHz |
| 电流 - 输入偏压： | 1.3pA |
| 电压 - 输入偏移： | 700µV |
| 电流 - 电源： | 6.3mA |
| 电流 - 输出 / 通道： | 44mA |
| 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： | 带卷 (TR) |
AD823A
Data Sheet
Rev. B | Page 18 of 20
Table 8. RMS Noise Contributions of Photodiode Preamp
Contributor
Expression
(μV)1
RF
2
π
N
F
f
R
4kT
55.17
VNOISE
N
F
D
F
M
S
NOISE
f
C
2C
C
V
2
π
138.5
RSS Total
149.1
1 RMS noise with RF = 50 kΩ, CS = 5 pF, CF = 1.2 pF, CM = 1.3 pF, and CD = 0.6 pF.
ACTIVE FILTER
The AD823A is an ideal candidate for an active filter because of
its low input bias current and its low input capacitance. Low
input bias current reduces dc error in the signal path while low
input capacitance improves the accuracy of the active filter.
As a general rule of thumb, the bandwidth of the amplifier should
be at least 10 times bigger than the cutoff frequency of the filter
implemented. Therefore, the AD823A is capable of implementing
active filters of up to 1.7 MHz.
0
94
39
-146
AD823A
RT
49.9
R2
1.12k
R1
1.12k
C1
200pF
+VS
–VS
VOUT
VIN
C2
100pF
Figure 46. Two-Pole Sallen-Key Active Filter
Figure 46 shows an example of a second-order Butterworth
filter, which is implemented by the Sallen-Key topology. This
structure can be duplicated to produce higher-order filters.
3
–36
–33
–30
–27
–24
–21
–18
–15
–12
–9
–6
–3
0
100
1k
10k
100k
10M
1M
M
AG
NI
T
UD
E
(
d
B)
FREQUENCY (Hz)
09
43
9-
14
7
Figure 47. Two-Pole Butterworth Active Filter Response
Figure 47 shows the two-pole Butterworth active filter’s response.
Note that it has a maximally flat pass band, a 3 dB bandwidth
of 1 MHz, and a 12 dB/octave roll-off in the stop band.
The cutoff frequency (fc) and the Q factor of the Butterworth
filter can be calculated by:
2
1
2
1
2
1
C
R
f
c
(7)
2
1
2
1
2
1
C
R
C
R
Q
(8)
Therefore, one can easily adjust the cutoff frequency by
appropriately factoring the resistor and capacitor values. For
example, a 100 kHz filter can be implemented by increasing the
values of R1 and R2 by 10 times. Note that the Q factor remains
the same in this case.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD823AARZ-RL | 功能描述:IC OPAMP FET RR 17MHZ DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:J-FET 电路数:2 输出类型:- 转换速率:3.5 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:30pA 电压 - 输入偏移:2000µV 电流 - 电源:200µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:8-DIP（0.300"，7.62mm） 供应商设备封装:8-PDIP 包装:管件 |
| AD823AN | 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R O/P 制造商:Rochester Electronics LLC 功能描述:DUAL FET R-TO-R 12MHZ AMP - Bulk 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD823AN | 制造商:Analog Devices 功能描述:GENERAL USAGE DUAL OP-AMP(2030031)((NS)) |
| AD823ANZ | 功能描述:IC OPAMP JFET R-R DUAL LN 8DIP 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 |
| AD823ANZ | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC 制造商:Analog Devices 功能描述:IC, OP-AMP, 16MHZ, 25V/s, 0.8mV, DIP-8 |
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