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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
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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Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s):
OPA211 OPA2211
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| OPA2111 | 制造商:BB 制造商全稱:BB 功能描述:Dual Low Noise Precision Difet OPERATIONAL AMPLIFIER |
| OPA2111AM | 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Lo-Noise Difet Op Amp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2111AM | 制造商:Texas Instruments 功能描述:SEMICONDUCTOR ((NW)) |
| OPA2111BM | 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Lo-Noise Difet Op Amp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OPA2111KM | 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Lo-Noise Difet Op Amp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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