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INA106 参数 Datasheet PDF下载

INA106图片预览
型号: INA106
PDF下载: 下载PDF文件 查看货源
内容描述: 精密增益= 10差动放大器 [Precision Gain = 10 DIFFERENTIAL AMPLIFIER]
分类和应用: 放大器
文件页数/大小: 13 页 / 1459 K
品牌: TI [ TEXAS INSTRUMENTS ]
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INA106  
E1  
In  
A1  
INA106  
10  
10kΩ  
100kΩ  
V1  
2
5
6
1
R2  
2
5
6
1
Gain  
Adjust  
200Ω  
E0  
R1  
E0  
Output  
R2  
10Ω  
10kΩ  
100kΩ  
V2  
3
3
CMR  
Adjust  
200Ω  
A2  
E0 = 10(1 + 2R2 /R1) (E2 E1)  
To eliminate adjustment interactions,  
first adjust gain with V2 grounded.  
E2  
+In  
FIGURE3. DifferenceAmplifierwithGainandCMRAdjust.  
To make a high performance high gain instrumentation amplifier, the INA106  
can be combined with state-of-the-art op amps. For low source impedance  
applications, OPA37s will give the best noise, offset, and temperature drift. At  
source impedances above about 10k, the bias current noise of the OPA37  
reacting with input impedance degrades noise. Forthese applications, use an  
OPA111 or a dual OPA2111 FET input op amp for lower noise. For an  
electrometer grade IA, use the OPA128see table below.  
INA106  
10k  
100kΩ  
2
5
6
Using the INA106 for the difference amplifier also extends the input common-  
mode range of the instrumentation amplifier to ±10V. A conventional 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.  
V2  
VO  
VO = 10V2  
R1  
R2  
GAIN CMRR  
NOISE AT 1kHz  
A1, A2  
() (k) (V/V)  
(dB)  
Ib (pA)  
(nV/ Hz)  
10kΩ  
100kΩ  
OPA37A  
OPA111B  
OPA128LM  
50.5 2.5  
1000  
1000  
1000  
128  
110  
118  
40000  
1
0.075  
4
10  
38  
202  
202  
10  
10  
3
1
FIGURE 6. Precision Instrumentation Amplifier.  
Gain Error = 0.01% maximum  
Nonlinearity = 0.001% maximum  
Gain Drift = 2.ppm/°C  
INA106  
R1  
R2  
10kΩ  
100kΩ  
FIGURE 4. Precision G = –10 Inverting Amplifier.  
2
5
6
R4  
100kΩ  
V0  
INA106  
V1  
V3  
1
3
R1  
R2  
V0 = V1 + 10 V3  
10kΩ  
100kΩ  
2
1
5
6
R3  
10kΩ  
R4  
100kΩ  
VO  
VIN  
FIGURE 7. Precision Summing Amplifier.  
V
O = VIN  
±100V  
Safe Input  
R3  
10kΩ  
INA106  
3
10k  
100kΩ  
2
5
6
Thiscircuitfollowsan11/1dividerwithagainof11foranoverallgainofunity.  
With an 11/1 divider, the input signal can exceed 100V without damage.  
VO  
100kΩ  
10kΩ  
FIGURE 5. Voltage Follower with Input Protection.  
1
3
VO = 11VIN  
VIN  
Gain Error =  
0.01% maximum  
FIGURE 8. Precision G = 11 Buffer.  
INA106  
6
SBOS152A  
www.ti.com  
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