參數(shù)資料
型號: AD8045ACPZ-REEL
廠商: Analog Devices Inc
文件頁數(shù): 11/25頁
文件大?。?/td> 0K
描述: IC OPAMP VF ULDIST LN 8LFCSP
產(chǎn)品培訓模塊: Practical Guide High Speed PCB Layout
標準包裝: 5,000
放大器類型: 電壓反饋
電路數(shù): 1
轉(zhuǎn)換速率: 1350 V/µs
-3db帶寬: 1GHz
電流 - 輸入偏壓: 2µA
電壓 - 輸入偏移: 200µV
電流 - 電源: 16mA
電流 - 輸出 / 通道: 70mA
電壓 - 電源,單路/雙路(±): 3.3 V ~ 12 V,±1.65 V ~ 6 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-VFDFN 裸露焊盤,CSP
供應商設備封裝: 8-LFCSP-VD(3x3)
包裝: 帶卷 (TR)
AD8045
Rev. A | Page 18 of 24
OUTPUT NOISE
Figure 66 shows the contributors to the noise at the output of a
noninverting configuration.
RG
RF
VOUT
RS
+–
VEN
VRF
VRG
VRS
IEN+
IEN
04814-0-011
Figure 66. Amplifier DC Errors
Ven
, IN+, and IN are due to the amplifier.
,
, and
are due to the feedback network resistors. R
F
R
V
G
R
V
S
R
V
G
and RF, and
source resistor, RS. Total output voltage noise,
EN
OUT
V
_
, is the
rms sum of all the contributions.
=
EN
OUT
V
_
() () ()
()
( )2
2
4
n
S
n
G
f
n
G
F
n
S
n
G
kTR
G
kTR
G
||R
R
IN
G
R
IN
Ven
G
+
×
+
×
+
×
where:
Gn
is the noise gain
+
G
F
R
.
Ven
is the op amp input voltage noise.
IN
is the op amp input current noise.
Table 7 lists the expected output voltage noise spectral density
for several gain configurations.
Table 7. Noise and Bandwidth for Various Gains
Gain
RF
RG
RS
3 dB
Bandwidth1
Output
Noise
(nV/√Hz)
+1
0
100
1 GHz
3.3
+2
499
0
400 MHz
7.4
+5
499
124
0
90 MHz
16.4
+10
499
56
0
40 MHz
31
1
499
N/A
300 MHz
7.4
1 RL = 1 k.
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