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參數(shù)資料
| 型號： | 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，高精度運算放大器，小DFN - 8封裝 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大?。?/td> | 407K |
| 代理商： | OPA211_08 |
www.ti.com
TOTAL HARMONIC DISTORTION
MEASUREMENTS
OPA211 series op amps have excellent distortion
characteristics. THD + Noise is below 0.0001% (G =
+1, V
O
= 3V
RMS
) throughout the audio frequency
range, 20Hz to 20kHz, with a 600
load.
OPA211
OPA2211
SBOS377D–OCTOBER 2006–REVISED FEBRUARY 2008
Figure 41
illustrates both inverting and noninverting
op amp circuit configurations with gain. In circuit
configurations
with
gain,
resistors also contribute noise. The current noise of
the op amp reacts with the feedback resistors to
create additional noise components. The feedback
resistor values can generally be chosen to make
these noise sources negligible. The equations for
total noise are shown for both configurations.
feedback factor or noise gain of the circuit. The
closed-loop gain is unchanged, but the feedback
available for error correction is reduced by a factor of
101, thus extending the resolution by 101. Note that
the input signal and load applied to the op amp are
the same as with conventional feedback without R
3
.
The value of R
3
should be kept small to minimize its
effect on the distortion measurements.
the
feedback
network
Validity
duplicating measurements at high gain and/or high
frequency
where
the
distortion
measurement
capability
Measurements for this data sheet were made with an
Audio
Precision
System
analyzer, which greatly simplifies such repetitive
measurements. The measurement technique can,
however,
be
performed
measurement instruments.
of
this
technique
can
be
verified
by
is
within
equipment.
the
of
the
test
Two
distortion/noise
with
manual
distortion
The distortion produced by OPA211 series op amps
is below the measurement limit of many commercially
available equipment. However, a special test circuit
illustrated in
Figure 42
can be used to extend the
measurement capabilities.
Op amp distortion can be considered an internal error
source that can be referred to the input.
Figure 42
shows a circuit that causes the op amp distortion to
be 101 times greater than normally produced by the
op amp. The addition of R
3
to the otherwise standard
noninverting
amplifier
configuration
alters
the
Copyright 2006–2008, Texas Instruments Incorporated
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OPA211 OPA2211
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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:運算放大器 - 運放 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:運算放大器 - 運放 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:運算放大器 - 運放 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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