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LT1250

更新时间： 2024-11-22 22:55:47
品牌 Logo 应用领域
凌特 - Linear 放大器
页数 文件大小 规格书
8页 231K
描述
Very Low Noise Zero-Drift Bridge Amplifier

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中文翻译

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LT1250 数据手册

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LTC1250  
Very Low Noise  
Zero-Drift Bridge Amplifier  
U
DESCRIPTIO  
EATURE  
S
F
The LTC®1250 is a high performance, very low noise zero-  
drift operational amplifier. The LTC1250’s combination of  
lowfront-endnoiseandDCprecisionmakesitidealforuse  
with low impedance bridge transducers. The LTC1250  
features typical input noise of 0.75µVP-P from 0.1Hz to  
10Hz, and 0.2µVP-P from 0.1Hz to 1Hz. The LTC1250 has  
DCto1Hznoiseof0.35µVP-P, surpassingthatoflownoise  
bipolar parts including the OP-07, OP-77, and LT1012.  
The LTC1250 uses the industry-standard single op amp  
pinout, and requires no external components or nulling  
signals, allowing it to be a plug-in replacement for bipolar  
op amps.  
■
■
■
■
■
■
■
■
■
Very Low Noise: 0.75µVP-P Typ, 0.1Hz to 10Hz  
DC to 1Hz Noise Lower Than OP-07  
Full Output Swing into 1k Load  
Offset Voltage: 10µV Max  
Offset Voltage Drift: 50nV/°C Max  
Common-Mode Rejection Ratio: 110dB Min  
Power Supply Rejection Ratio: 115dB Min  
No External Components Required  
Pin-Compatible with Standard 8-Pin Op Amps  
O U  
PPLICATI  
S
A
■
■
■
■
■
■
Electronic Scales  
Strain Gauge Amplifiers  
The LTC1250 incorporates an improved output stage  
capable of driving 4.3V into a 1k load with a single 5V  
supply; it will swing ±4.9V into 5k with ±5V supplies. The  
input common mode range includes ground with single  
power supply voltages above 12V. Supply current is 3mA  
with a ±5V supply, and overload recovery times from  
positive and negative saturation are 0.5ms and 1.5ms,  
respectively. The internal nulling clock is set at 5kHz for  
optimum low frequency noise and offset drift; no external  
connections are necessary.  
Thermocouple Amplifiers  
High Resolution Data Acquisition  
Low Noise Transducers  
Instrumentation Amplifiers  
The LTC1250 is available in standard 8-pin ceramic and  
plastic DIPs, as well as an 8-pin SOIC package.  
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.  
U
O
TYPICAL APPLICATI  
Differential Bridge Amplifier  
Input Referred Noise 0.1Hz to 10Hz  
2
5V  
5V  
V
A
= ±5V  
= 10k  
S
V
50Ω  
GAIN  
TRIM  
1000pF  
18.2k  
0.1µF  
1
0
350Ω  
STRAIN  
GAUGE  
7
2
3
–
+
6
A
V
= 100  
LTC1250  
–1  
–2  
4
1000pF  
18.2k  
0
2
4
6
8
10  
TIME (s)  
–5V  
1250 TA01  
–5V  
LT1250 TA02  
1
12345678

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