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參數(shù)資料
| 型號(hào)： | OPA2107AU |
| 英文描述： | Precision Dual Difet OPERATIONAL AMPLIFIER |
| 中文描述： | 精密雙運(yùn)算放大器Difet |
| 文件頁(yè)數(shù)： | 7/7頁(yè) |
| 文件大?。?/td> | 158K |
| 代理商： | OPA2107AU |
7
OPA2107
FIGURE 2. FET Input Instrumentation Amplifier.
I
= 5pA Max
Gain = 100
CMRR ~
R
IN
= 10
13
Differential Voltage Gain = 1 + 2R
F
/R
G
= 100
A
1
Output
3
2
B
7
6
5
1
–In
+In
R
F
5k
R
F
5k
R
G
101
25k
25k
1/2
OPA2107
1/2
OPA2107
25k
25k
6
5
3
2
INA105
FIGURE 3. Precision Instrumentation Amplifier.
Using the INA106 for an output difference amplifier extends the input
common-mode range of an instrumentation amplifier to
±
10V. A conven-
tional IA with a unity-gain difference amplifier has an input common-mode
range limited to
±
5V for an output swing of
±
10V. This is because a unity-
gain difference amp needs
±
5V at the input for 10V at the output, allowing
only 5V additional for common-mode range.
E
O
= [10 (1 + 2R
F
/R
G
) (E
2
– E
1
)] = 1000 (E
2
– E
1
)
A
1
E
Output
3
2
B
7
6
5
1
E
–In
R
F
10k
R
F
10k
R
G
202
10k
10k
1/2
OPA2107
1/2
OPA2107
100k
100k
6
5
3
2
INA106
1
E
+In
2
APPLICATIONS INFORMATION
AND CIRCUITS
The OPA2107 is unity-gain stable and has excellent phase
margin. This makes it easy to use in a wide variety of
applications.
Power supply connections should be bypassed with capaci-
tors positioned close to the amplifier pins. In most cases,
0.1
μ
F ceramic capacitors are adequate. Applications with
larger load currents and fast transient signals may need up to
1
μ
F tantalum bypass capacitors.
INPUT BIAS CURRENT
The OPA2107’s
Difet
input stages have very low input bias
current—an order of magnitude lower than BIFET op amps.
Circuit board leakage paths can significantly degrade per-
formance. This is especially evident with the SO-8 surface-
mount package where pin-to-pin dimensions are particularly
small. Residual soldering flux, dirt, and oils, which conduct
leakage current, can be removed by proper cleaning. In most
instances a two-step cleaning process is adequate using a
clean organic solvent rinse followed by de-ionized water.
Each rinse should be followed by a 30-minute bake at 85
°
C.
A circuit board guard pattern effectively reduces errors due
to circuit board leakage (Figure 1). By encircling critical
high impedance nodes with a low impedance connection at
the same circuit potential, any leakage currents will flow
harmlessly to the low impedance node. Guard traces should
be placed on all levels of a multiple-layer circuit board.
A
In
Non-Inverting
1
A
In
Buffer
1
Out
2
3
A
In
Inverting
1
Out
2
3
Out
2
3
FIGURE 1. Connection of Input Guard.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA2107AU | 制造商:Texas Instruments 功能描述:IC SM OP-AMP DUAL DIFET PRECISION 制造商:Texas Instruments 功能描述:IC, OP-AMP, 4.5MHz, 18V/ us, SOIC-8 |
| OPA2107AU/2K5 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Precision Dual 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 |
| OPA2107AU/2K5E4 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Precision Dual 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 |
| OPA2107AUE4 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Precision Dual 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 |
| OPA211 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.1nV/☆Hz Noise, Low Power, Precision Operational Amplifier in Small DFN-8 Package |
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