- 您現在的位置：買賣IC網 > PDF目錄373934 > AD8066ARM-REEL (ANALOG DEVICES INC) High Performance, 145 MHz FastFET⑩ Op Amps PDF資料下載
參數資料
| 型號： | AD8066ARM-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | High Performance, 145 MHz FastFET⑩ Op Amps |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | MO-187AA, MSOP-8 |
| 文件頁數： | 23/28頁 |
| 文件大?。?/td> | 364K |
| 代理商： | AD8066ARM-REEL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁當前第23頁第24頁第25頁第26頁第27頁第28頁
AD8065/AD8066
INPUT-TO-OUTPUT COUPLING
In order to minimize capacitive coupling between the inputs
and output, the output signal traces should not be parallel with
the inputs.
Rev. E | Page 23 of 28
WIDEBAND PHOTODIODE PREAMP
Figure 58 shows an I/V converter with an electrical model of a
photodiode. The basic transfer function is where
F
F
F
PHOTO
+
1
OUT
R
sC
R
I
V
×
=
where
I
PHOTO
is the output current of the photodiode, and the
parallel combination of
R
F
and
C
F
set the signal bandwidth.
The stable bandwidth attainable with this preamp is a function
of
R
F
, the gain bandwidth product of the amplifier, and the total
capacitance at the amplifier’s summing junction, including
C
S
and the amplifier input capacitance.
R
F
and the total capacitance
produce a pole in the amplifier’s loop transmission that can
result in peaking and instability. Adding
C
F
creates a 0 in the
loop transmission, which compensates for the pole’s effect and
reduces the signal bandwidth. It can be shown that the signal
bandwidth resulting in a 45° phase margin (
f
(45)
) is defined by
the expression
(
)
S
F
CR
R
C
f
f
×
×
π
=
2
45
where
f
CR
is the amplifier crossover frequency,
R
F
is the feedback
resistor, and
C
S
is the total capacitance at the amplifier summing
junction (amplifier + photodiode + board parasitics).
The value of
C
F
that produces f
(45)
can be shown to be
CR
F
S
F
f
R
C
C
×
×
π
=
2
The frequency response in this case will show about 2 dB of
peaking and 15% overshoot. Doubling
C
F
and cutting the
bandwidth in half will result in a flat frequency response, with
about 5% transient overshoot.
Table 5. RMS Noise Contributions of Photodiode Preamp
The preamp’s output noise over frequency is shown in Figure 59.
FREQUENCY (Hz)
V
2
π
R
F
C
F
2
π
R
F
(C
F
+ C
S
+ C
M
+ 2C
D
)
(C
S
+ C
M
+ 2C
D
+ C
F
)/C
F
R
F
NOISE
VEN (C
F
+ C
S
+ C
M
+ 2C
D
)/C
F
f
3
f
2
f
3
=
VEN
f
1
f
2
=
f
1
=
1
1
f
CR
NOISE DUE TO AMPLIFIER
0
Figure 59. Photodiode Voltage Noise Contributions
The pole in the loop transmission translates to a 0 in the
amplifier’s noise gain, leading to an amplification of the input
voltage noise over frequency. The loop transmission 0
introduced by
C
F
limits the amplification. The noise gain
bandwidth extends past the preamp signal bandwidth and is
eventually rolled off by the decreasing loop gain of the
amplifier. Keeping the input terminal impedances matched is
recommended to eliminate common-mode noise peaking
effects, which will add to the output noise.
Integrating the square of the output voltage noise spectral
density over frequency and then taking the square root allows
users to obtain the total rms output noise of the preamp. Table 5
summarizes approximations for the amplifier and feedback and
source resistances. Noise components for an example preamp
with
R
F
= 50 k,
C
S
= 15 pF, and
C
F
= 2 pF (bandwidth of about
1.6 MHz) are also listed.
Contributor
Expression
RMS Noise with R
F
= 50 k,
C
S
= 15 pF, C
S
= 15 pF
64.5 μV
R
F
(×2)
57
.
1
4
2
f
R
kT
2
F
×
×
×
×
Amp to f
1
1
f
VEN
×
2.4 μV
Amp (f
2
– f
1
)
1
2
F
D
F
M
S
f
f
C
C
C
C
C
VEN
×
+
+
+
×
2
31 μV
Amp to (past f
2
)
57
.
×
2
×
+
+
C
+
×
3
F
F
D
M
S
f
C
C
C
C
VEN
260 μV
270 μV (
Total
)
相關PDF資料 |
PDF描述 |
|---|---|
| AD8066ARM-REEL7 | High Performance, 145 MHz FastFET⑩ Op Amps |
| AD8066ARZ-REEL1 | \ |
| AD8066ARZ-REEL71 | High Performance, 145 MHz FastFET⑩ Op Amps |
| AD8066ARZ1 | High Performance, 145 MHz FastFET⑩ Op Amps |
| AD8073JR-REEL | Low Cost, Dual/Triple Video Amplifiers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8066ARM-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Dual Volt Fdbk R-R O/P ±12V/24V 8-Pin MSOP T/R |
| AD8066ARMZ | 功能描述:IC OPAMP VF R-R DUAL LN LP 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:FastFET™ 標準包裝:2,500 系列:- 放大器類型:通用 電路數:4 輸出類型:- 轉換速率: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） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD8066ARMZ | 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC |
| AD8066ARMZ-REEL7 | 功能描述:IC OPAMP VF R-R DUAL LN LP 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:FastFET™ 標準包裝:100 系列:- 放大器類型:通用 電路數:1 輸出類型:- 轉換速率:0.2 V/µs 增益帶寬積:- -3db帶寬:- 電流 - 輸入偏壓:100pA 電壓 - 輸入偏移:30µV 電流 - 電源:380µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):±2 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SO 包裝:管件 |
| AD8066AR-REEL | 制造商:Analog Devices 功能描述:OP Amp Dual Volt Fdbk R-R O/P ±12V/24V 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:SOIC DUAL HI PERF HI SPEED FET AMPLIFIER - Tape and Reel |
發布緊急采購，3分鐘左右您將得到回復。