參數(shù)資料
型號(hào): OPA211_08
廠商: Texas Instruments, Inc.
英文描述: 1.1nV/☆Hz Noise, Low Power, Precision Operational Amplifier in Small DFN-8 Package
中文描述: 1.1nV /☆赫茲噪聲,低功耗,高精度運(yùn)算放大器,小DFN - 8封裝
文件頁數(shù): 16/17頁
文件大?。?/td> 407K
代理商: OPA211_08
www.ti.com
R
1
R
2
E
O
R
1
R
2
E
O
R
S
V
S
R
S
V
S
Noise in Noninverting Gain Configuration
Noise in Inverting Gain Configuration
Noise at the output:
E
=
O
2
Where e =
S
4kTR
= thermal noise of R
S
2
1 +
R
2
R
1
e
+ e
n
1
2
S
S
+ e
+ (i R ) + e
+ (i
n
R )
2
2
2
2
2
1 +
R
2
R
1
R
2
R
1
e =
1
4kTR
= thermal noise of R
1
2
1 +
R
2
R
1
e =
2
4kTR = thermal noise of R
Noise at the output:
E
=
O
2
Where e = 4kTR
S
= thermal noise of R
S
2
1 +
R
2
R + R
S
e
+ e
n
1
2
S
+ e
+ (i R ) + e
2
2
2
2
R
2
R + R
S
R
2
R + R
S
e = 4kTR
1
= thermal noise of R
1
e = 4kTR
2
2
= thermal noise of R
For the OPA211 series op amps at 1kHz, e = 1.1nV/ Hz and i = 1.7pA/ Hz.
R
2
OPA211
R
1
Signal Gain = 1+
Distortion Gain = 1+
R
3
V = 3V
RMS
Generator
Output
Analyzer
Input
Audio Precision
System Two
(1)
with PC Controller
R
600
W
L
SIG.
GAIN
DIST.
GAIN
R
1
R
2
R
3
100
W
1k
W
1k
W
10
W
11
W
1
11
101
101
R
2
R
1
R
2
R II R
3
NOTE: (1) Measurement BW = 80kHz.
OPA211
OPA2211
SBOS377D–OCTOBER 2006–REVISED FEBRUARY 2008
Figure 41. Noise Calculation in Gain Configurations
Figure 42. Distortion Test Circuit
16
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Product Folder Link(s):
OPA211 OPA2211
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