参数资料
型号: AD8045ARDZ-REEL7
厂商: Analog Devices Inc
文件页数: 11/25页
文件大小: 0K
描述: IC OPAMP VF ULDIST LN 70MA 8SOIC
产品培训模块: Practical Guide High Speed PCB Layout
标准包装: 1,000
放大器类型: 电压反馈
电路数: 1
转换速率: 1350 V/µs
-3db带宽: 1GHz
电流 - 输入偏压: 2µA
电压 - 输入偏移: 200µV
电流 - 电源: 16mA
电流 - 输出 / 通道: 70mA
电压 - 电源,单路/双路(±): 3.3 V ~ 12 V,±1.65 V ~ 6 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm Width)裸露焊盘
供应商设备封装: 8-SOIC-EP
包装: 带卷 (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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