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參數(shù)資料
| 型號： | AD823AARZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP FET RR 17MHZ DUAL 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | J-FET |
| 電路數(shù)： | 2 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 35 V/µs |
| -3db帶寬： | 19MHz |
| 電流 - 輸入偏壓： | 1.3pA |
| 電壓 - 輸入偏移： | 700µV |
| 電流 - 電源： | 6.3mA |
| 電流 - 輸出 / 通道： | 44mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 36 V，±1.5 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) |
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱: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 |
| AD823AR | 功能描述:IC OPAMP JFET R-R DUAL LN 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件 |
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