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參數(shù)資料
| 型號： | INA116 |
| 元件分類： | 測量放大器 |
| 英文描述： | Very High Accuracy Instrumentation Amplifier |
| 中文描述： | 極高精度儀表放大器 |
| 文件頁數(shù)： | 9/9頁 |
| 文件大?。?/td> | 246K |
| 代理商： | INA116 |
9
INA116
INPUT CONNECTIONS
Some applications must make high impedance input connec-
tions to external sensors or input connectors. To assure low
leakage, the input should be guarded all the way to the signal
source—see Figure 5. Coaxial cable can be used with the
shield driven by the guard. A separate connection is required
to provide a ground reference at the signal source. Triaxial
cable may reduce noise pickup and provides the ground
reference at the source. Drive the inner shield at guard
potential and ground the outer shield. Two separate guarded
lines are required if both the inverting and non-inverting
inputs are brought to the source.
The guard drive output current is limited to approximately
+2mA/–50
μ
A. For slow input signals the internal guard
output can directly drive a cable shield. With fast input
signals, however, the guard may not provide sufficient
output current to rapidly charge the cable capacitance. An op
amp buffer may be required as shown in Figure 6.
FIGURE 7. pH or Ion Measurement System.
FIGURE 6. Buffered Guard Drive.
V
IN
1M
+
V
IN
–
Two coaxial cables and ground
Two triaxial cables
V
High-Z
Source
1M
V
High-Z
Source
V
IN
+
V
IN
–
FIGURE 5. Input Cable Guarding Circuits.
OPA131
Cable
V
IN
Op amp buffer helps
guard cables with
fast input signals—
see text.
Circuit Board
Guard
150
INA116
6
3
1
16
5.62k
13
8
9
11
V
O
G = 10
+15
–15
Solution
Ground
Sample
Electrode
Reference
Electrode
相關PDF資料 |
PDF描述 |
|---|---|
| INA116P | Very High Accuracy Instrumentation Amplifier |
| INA116U | Very High Accuracy Instrumentation Amplifier |
| INA117KU | High Common-Mode Voltage DIFFERENCE AMPLIFIER |
| INA117AM | High Common-Mode Voltage DIFFERENCE AMPLIFIER |
| INA117BM | High Common-Mode Voltage DIFFERENCE AMPLIFIER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| INA116P | 制造商:BB 制造商全稱:BB 功能描述:Ultra Low Input Bias Current INSTRUMENTATION AMPLIFIER |
| INA116PA | 功能描述:儀表放大器 Ultra Low Input Bias Current RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| INA116PA | 制造商:Texas Instruments 功能描述:IC AMP INSTRUMENTATION DIP16 116 |
| INA116PAG4 | 功能描述:儀表放大器 Ultra Low Input Bias Current RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| INA116U | 制造商:BB 制造商全稱:BB 功能描述:Ultra Low Input Bias Current INSTRUMENTATION AMPLIFIER |
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