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LT1491AIS#TRPBF PDF预览

LT1491AIS#TRPBF

更新时间： 2024-11-07 13:09:35
品牌 Logo 应用领域
凌特 - Linear 运算放大器
页数 文件大小 规格书
12页 315K
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中文翻译

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LT1491AIS#TRPBF 数据手册

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LT1490/LT1491  
Dual and Quad  
Micropower Rail-to-Rail  
Input and Output Op Amps  
U
FEATURES  
DESCRIPTION  
The dual LT®1490 and quad LT1491 op amps operate on all  
single and split supplies with a total voltage of 2V to 44V  
drawing only 40µA of quiescent current per amplifier. These  
amplifiersarereversesupplyprotected;theydrawnocurrent  
for reverse supply up to 18V. The input range of the LT1490/  
LT1491includesbothsuppliesandtheoutputswingstoboth  
supplies. Unlike most micropower op amps, the LT1490/  
LT1491 can drive heavy loads; their rail-to-rail outputs drive  
20mA.TheLT1490/LT1491areunity-gainstableanddriveall  
capacitive loads up to 10,000pF when optional 0.22µF and  
150Ω compensation is used.  
■
Rail-to-Rail Input and Output  
■
Single Supply Input Range: –0.4V to 44V  
■
Micropower: 50µA/Amplifier Max  
■
Specified on 3V, 5V and ±15V Supplies  
High Output Current: 20mA  
Output Drives 10,000pF with Output Compensation  
Reverse Battery Protection to 18V  
No Supply Sequencing Problems  
High Voltage Gain: 1500V/mV  
High CMRR: 98dB  
No Phase Reversal  
Gain Bandwidth Product: 200kHz  
■
■
■
■
■
■
■
■
The LT1490/LT1491 have a unique input stage that oper-  
ates and remains high impedance when above the positive  
supply. The inputs take 44V both differential and common  
mode even when operating on a 3V supply. Built-in resis-  
tors protect the inputs for faults below the negative supply  
upto22V.Thereisnophasereversaloftheoutputforinputs  
22V below V– or 44V above V–, independent of V+.  
U
APPLICATIONS  
■
Battery- or Solar-Powered Systems  
Portable Instrumentation  
Sensor Conditioning  
■
Supply Current Sensing  
■
The LT1490 dual op amp is available in the 8-pin SO and  
PDIPpackages. ThequadLT1491isavailableinthe14-pin  
Battery Monitoring  
Micropower Active Filters  
4mA to 20mA Transmitters  
■
■
SO and PDIP packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Battery Monitor  
R
R
S
A
0.2Ω  
2k  
Q1  
2N3904  
CHARGER  
VOLTAGE  
+
A
R
I
A
'
BATT  
–
1/4 LT1491  
2k  
C
LOGIC  
–
1/4 LT1491  
+
R
B
Q2  
2N3904  
2k  
LOGIC HIGH (5V) = CHARGING  
LOGIC LOW (0V) = DISCHARGING  
+
B
R
B
'
1/4 LT1491  
2k  
–
LOAD  
+
D
+
R
G
V
1/4 LT1491  
OUT  
10k  
V
= 12V  
BATT  
–
S1  
10k  
90.9k  
V
V
=
OUT  
OUT  
S1 = OPEN, GAIN = 1  
S1 = CLOSED, GAIN = 10  
R
= R  
A
S
B
I
=
AMPS  
BATT  
1490/91 TA01  
(R )(R /R )(GAIN) GAIN  
V
= 5V, 0V  
S
G
A
1
1234567...12

中文翻译

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LT1491AIS#TRPBF 替代型号

型号 品牌 替代类型 描述 数据表
LT1491AHS#PBF Linear

完全替代

 LT1491A - Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: SO;
LT1491ACS#PBF Linear

完全替代

 暂无描述
LT1491ACS Linear

完全替代

 Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps

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LT1491IS#TR Linear

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 		LT1491 - Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps; Package: SO; Pins
LT1491IS#TRPBF Linear

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 		LT1491 - Dual and Quad Micropower Rail-to-Rail Input and Output Op Amps; Package: SO; Pins
LT1492 Linear

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 		5MHz, 3V/us, Low Power Single Supply, Dual and Quad Precision Op Amps
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 		5MHz、3V/μs、低功率、单电源、双通道精准型运算放大器
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