V
參數(shù)資料
型號(hào)： AD8099ACP-R2
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 14/29頁(yè)
文件大?。?/td> 0K
描述： IC OPAMP VF ULN ULDIST 8LFCSP
產(chǎn)品培訓(xùn)模塊： Practical Guide High Speed PCB Layout
產(chǎn)品變化通告： Product Discontinuance 27/July/2010
標(biāo)準(zhǔn)包裝： 1
放大器類(lèi)型： 電壓反饋
電路數(shù)： 1
轉(zhuǎn)換速率： 1350 V/µs
-3db帶寬： 510MHz
電流 - 輸入偏壓： 6µA
電壓 - 輸入偏移： 100µV
電流 - 電源： 15mA
電流 - 輸出 / 通道： 178mA
電壓 - 電源，單路/雙路(±)： 5 V ~ 12 V，±2.5 V ~ 6 V
工作溫度： -40°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 8-VFDFN 裸露焊盤(pán)，CSP
供應(yīng)商設(shè)備封裝： 8-CSP（3x3）
包裝： 標(biāo)準(zhǔn)包裝
其它名稱(chēng)： AD8099ACP-R2DKR
AD8099
Data Sheet
Rev. D | Page 20 of 28
FREQUENCY (MHz)
CLOSED-
L
OOP
GAIN
(
d
B)
–1
3000
04511-0-032
1
10
8
9
7
6
5
4
3
2
1
0
VS = ±5V
G = +2
RLOAD = 1k
SOIC PACKAGE
10
100
1000
RF = RG = 200
RF = RG = 250
RF = RG = 300
FREQUENCY (MHz)
CLOSED-
L
OOP
GAIN
(
d
B)
1
–1
10
9
8
7
6
5
4
3
2
1
0
10
100
1000
3000
04511-0-058
CF = 1pF
CF = 0.5pF
CF = 1.5pF
VS = ±5V
G = +2
RLOAD = 1k
SOIC PACKAGE
FREQUENCY (MHz)
CLOSED-
L
OOP
GAIN
(
d
B)
0
10000
04511-0-034
1
12
10
11
9
8
7
6
5
4
3
2
1
VS = ±5V
G = +2
RLOAD = 1k
SOIC PACKAGE
10
100
1000
RS = 0
RS = 50
RS = 20
1
8
4
7
5
3
6
2
AD8099
C5
0.1
F
CC
CF
C1
C4
10
F
C2
10
F
C3
0.1
F
RC
RF
RG
RS
R1
+VS
–VS
VOUT
SOIC PINOUT SHOWN
VIN
DISABLE
04511-0-117
Figure 68. Frequency Response for Various Values of RF, CF, RS
TOTAL OUTPUT NOISE CALCULATIONS AND DESIGN
To analyze the noise performance of an amplifier circuit, the
individual noise sources must be identified. Then determine if
the source has a significant contribution to overall noise perfor-
mance of the amplifier. To simplify the noise calculations, we
will work with noise spectral densities, rather than actual
voltages to leave bandwidth out of the expressions (noise
spectral density, which is generally expressed in nV/Hz, is
equivalent to the noise in a 1 Hz bandwidth).
The noise model shown in Figure 69 has six individual noise
sources: the Johnson noise of the three resistors, the op amp
voltage noise, and the current noise in each input of the
amplifier. Each noise source has its own contribution to the
noise at the output. Noise is generally specified RTI (referred to
input), but it is often simpler to calculate the noise referred to
the output (RTO) and then divide by the noise gain to obtain
the RTI noise.
All resistors have a Johnson noise of (4kBTR), where k is
Boltzmann’s Constant (1.38 × 10–23 J/K), T is the absolute
temperature in Kelvin, B is the bandwidth in Hz, and R is the
resistance in ohms. A simple relationship, which is easy to
remember, is that a 50 Ω resistor generates a Johnson noise of
1 nVHz at 25C. The AD8099 amplifier has roughly the same
equivalent noise as a 50 Ω resistor.
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