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INA114

更新时间： 2024-02-18 09:09:30
品牌 Logo 应用领域
德州仪器 - TI 放大器
页数 文件大小 规格书
17页 377K
描述
Precision INSTRUMENTATION AMPLIFIER

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INA114 技术参数

生命周期：Obsolete零件包装代码：SOIC
包装说明：SOL-16针数：16
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.33.00.01风险等级：5.1
放大器类型：INSTRUMENTATION AMPLIFIER最大平均偏置电流 (IIB)：0.002 µA
标称带宽 (3dB)：1 MHz最小共模抑制比：80 dB
最大输入失调电流 (IIO)：0.002 µA最大输入失调电压：150 µV
JESD-30 代码：R-PDSO-G16长度：10.3 mm
负供电电压上限：-18 V标称负供电电压 (Vsup)：-15 V
最大非线性：0.01%功能数量：1
端子数量：16最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE认证状态：Not Qualified
座面最大高度：2.65 mm标称压摆率：0.6 V/us
供电电压上限：18 V标称供电电压 (Vsup)：15 V
表面贴装：YES温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL最大电压增益：10000
最小电压增益：1标称电压增益：10
宽度：7.5 mmBase Number Matches：1

INA114 数据手册

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APPLICATION INFORMATION  
Figure 1 shows the basic connections required for operation  
of the INA114. Applications with noisy or high impedance  
power supplies may require decoupling capacitors close to  
the device pins as shown.  
ues. The accuracy and temperature coefficient of these  
resistors are included in the gain accuracy and drift specifi-  
cations of the INA114.  
The stability and temperature drift of the external gain  
setting resistor, RG, also affects gain. RG’s contribution to  
gain accuracy and drift can be directly inferred from the gain  
equation (1). Low resistor values required for high gain can  
make wiring resistance important. Sockets add to the wiring  
resistance which will contribute additional gain error (possi-  
bly an unstable gain error) in gains of approximately 100 or  
greater.  
The output is referred to the output reference (Ref) terminal  
which is normally grounded. This must be a low-impedance  
connection to assure good common-mode rejection. A resis-  
tance of 5Ω in series with the Ref pin will cause a typical  
device to degrade to approximately 80dB CMR (G = 1).  
SETTING THE GAIN  
Gain of the INA114 is set by connecting a single external  
resistor, RG:  
NOISE PERFORMANCE  
The INA114 provides very low noise in most applications.  
For differential source impedances less than 1kΩ, the INA103  
may provide lower noise. For source impedances greater  
than 50kΩ, the INA111 FET-input instrumentation ampli-  
fier may provide lower noise.  
50 kΩ  
R G  
G = 1 +  
(1)  
Commonly used gains and resistor values are shown in  
Figure 1.  
Low frequency noise of the INA114 is approximately  
0.4µVp-p measured from 0.1 to 10Hz. This is approximately  
one-tenth the noise of “low noise” chopper-stabilized ampli-  
fiers.  
The 50kΩ term in equation (1) comes from the sum of the  
two internal feedback resistors. These are on-chip metal film  
resistors which are laser trimmed to accurate absolute val-  
V+  
0.1µF  
Pin numbers are  
for DIP packages.  
7
–
VIN  
INA114  
2
1
Over-Voltage  
Protection  
A1  
VO = G • (VI+N – VI–N  
)
25kΩ  
25kΩ  
50kΩ  
RG  
25kΩ  
25kΩ  
G = 1 +  
6
5
A3  
RG  
+
8
3
VO  
Load  
–
A2  
+
VIN  
Over-Voltage  
Protection  
25kΩ  
25kΩ  
4
0.1µF  
DESIRED  
GAIN  
RG  
(Ω)  
NEAREST 1% RG  
(Ω)  
Also drawn in simplified form:  
V–  
1
2
5
10  
20  
50  
100  
200  
500  
1000  
2000  
5000  
10000  
No Connection  
50.00k  
12.50k  
5.556k  
2.632k  
1.02k  
No Connection  
49.9k  
12.4k  
5.62k  
2.61k  
1.02k  
511  
–
VIN  
INA114  
Ref  
VO  
RG  
+
VIN  
505.1  
251.3  
100.2  
50.05  
25.01  
10.00  
5.001  
249  
100  
49.9  
24.9  
10  
4.99  
FIGURE 1. Basic Connections.  
®
8
INA114  
1...567891011...17

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