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參數(shù)資料
| 型號(hào)： | INA131AP |
| 元件分類： | 測(cè)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(yè)數(shù)： | 7/10頁(yè) |
| 文件大?。?/td> | 113K |
| 代理商： | INA131AP |
INA131
7
device. Absolute accuracy of the internal values is
±
40%.
The nominal gain with an external R
G
resistor can be
calculated by:
G
=
100
+
250 k
R
G
Where: R
G
is the external gain resistor.
Accuracy of the 250k
term is
±
40%.
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).
NOISE PERFORMANCE
The INA131 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
Amplifier may provide lower noise.
Low frequency noise of the INA131 is approximately
0.4
μ
Vp-p measured from 0.1 to 10Hz. This is approxi-
mately one-tenth the noise of state-of-the-art chopper-stabi-
lized amplifiers.
FIGURE 1. Basic Connections.
(1)
A
1
A
2
A
3
6
25k
5k
25k
5k
7
4
3
8
1
2
V
IN
V
IN
V+
V–
INA131
–
+
5
Over-Voltage
Protection
25k
25k
Over-Voltage
Protection
Load
V
O
= 100 (V
IN
– V
IN
)
+
–
0.1μF
0.1μF
Pin numbers are
for DIP packages.
+
–
V
O
INA131
Also drawn in simplified form:
V
O
Ref
V
IN
–
V
IN
+
2.63k
APPLICATION INFORMATION
Figure 1 shows the basic connections required for operation
of the INA131. 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 device
with 110dB CMR to degrade to approximately 106dB CMR.
SETTING THE GAIN
No external resistors are required for G = 100. On-chip
laser-trimmed resistors set the gain, providing excellent gain
accuracy and temperature stability. Gain is distributed be-
tween the input and output stages of the INA131. Bandwidth
is increased by approximately five times (compared to the
INA114 in G = 100). Input common-mode range is also
improved (see “Input Common-Mode Range”).
Although the INA131 is primarily intended for fixed
G = 100 applications, the gain can be increased by connect-
ing an external resistor to the R
G
pins. The internal resistors
are trimmed for precise ratios, not to absolute values, so the
influence of an external resistor will vary from device to
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| INA131BP | Very High Accuracy Instrumentation Amplifier |
| INA132 | Low Power, Single-Supply DIFFERENCE AMPLIFIER |
| INA132P | Low Power, Single-Supply DIFFERENCE AMPLIFIER |
| INA132PA | Low Power, Single-Supply DIFFERENCE AMPLIFIER |
| INA132U | Low Power, Single-Supply DIFFERENCE AMPLIFIER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| INA131AP | 制造商:BURR-BROWN 功能描述:IC AMP INSTRUMENTATION DIP8 131 |
| INA131AP | 制造商:BURR-BROWN 功能描述:IC AMP INSTRUMENTATION DIP8 131 制造商:BURR-BROWN 功能描述:IC, AMP INSTRUMENTATION, DIP8, 131 |
| INA131AP | 制造商:Texas Instruments 功能描述:IC AMP INSTRUMENTATION 70KHZ 制造商:Texas Instruments 功能描述:IC, AMP, INSTRUMENTATION, 70KHZ |
| INA131AP-1 | 功能描述:特殊用途放大器 PRECISION INST AMP,G=100 Fixed RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| INA131AP-1G4 | 功能描述:特殊用途放大器 PRECISION INST AMP,G=100 Fixed RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
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