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參數(shù)資料
| 型號： | INA114AU |
| 元件分類： | 測量放大器 |
| 英文描述： | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| 中文描述： | 單電源，軌至軌，低成本儀表放大器 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大小： | 191K |
| 代理商： | INA114AU |
INA114
8
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.
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 5
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, R
G
:
G
=
1
+
50 k
Commonly used gains and resistor values are shown in
Figure 1.
The 50k
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-
FIGURE 1. Basic Connections.
R
G
(1)
DESIRED
GAIN
R
G
(
)
NEAREST 1% R
G
(
)
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
505.1
251.3
100.2
50.05
25.01
10.00
5.001
No Connection
49.9k
12.4k
5.62k
2.61k
1.02k
511
249
100
49.9
24.9
10
4.99
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, R
G
, also affects gain. R
G
’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.
NOISE PERFORMANCE
The INA114 provides very low noise in most applications.
For differential source impedances less than 1k
, the INA103
may provide lower noise. For source impedances greater
than 50k
, the INA111 FET-input instrumentation ampli-
fier may provide lower noise.
Low frequency noise of the INA114 is approximately
0.4
μ
Vp-p measured from 0.1 to 10Hz. This is approximately
one-tenth the noise of “l(fā)ow noise” chopper-stabilized ampli-
fiers.
A
1
A
2
A
3
6
25k
25k
25k
25k
7
4
3
8
1
2
V
IN
V
IN
R
G
V+
V–
INA114
G = 1 +50k
R
G
–
+
5
Over-Voltage
Protection
25k
25k
Over-Voltage
Protection
Load
V
O
= G (V
IN
– V
IN
)
+
–
0.1μF
0.1μF
Pin numbers are
for DIP packages.
+
–
V
O
INA114
R
G
Also drawn in simplified form:
V
O
Ref
V
IN
–
V
IN
+
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PDF描述 |
|---|---|
| INA115AU | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| INA115BU | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| INA115 | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| INA116PA | Very High Accuracy Instrumentation Amplifier |
| INA116UA | MOSFET N-CH 450V 7A TO-220D |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| INA114AU | 制造商:Texas Instruments 功能描述:AMP INSTRUMENTATION SOIC16 114 |
| INA114AU/1K | 功能描述:儀表放大器 Precision Instrumentation Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)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 |
| INA114AU/1KE4 | 功能描述:儀表放大器 Precision Instrumentation Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)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 |
| INA114AUE4 | 功能描述:儀表放大器 Precision Instrumentation Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)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 |
| INA114AUG4 | 功能描述:儀表放大器 Precision Instrumentation Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)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 |
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