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LT1490ACS8#PBF

更新时间： 2024-01-12 21:59:52
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凌特 - Linear 运算放大器
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16页 340K
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LT1490ACS8#PBF 数据手册

 浏览型号LT1490ACS8#PBF的Datasheet PDF文件第2页浏览型号LT1490ACS8#PBF的Datasheet PDF文件第3页浏览型号LT1490ACS8#PBF的Datasheet PDF文件第4页浏览型号LT1490ACS8#PBF的Datasheet PDF文件第5页浏览型号LT1490ACS8#PBF的Datasheet PDF文件第6页浏览型号LT1490ACS8#PBF的Datasheet PDF文件第7页 
LT1490A/LT1491A  
Dual/Quad Over-The-Top  
Micropower Rail-to-Rail  
Input and Output Op Amps  
U
FEATURES  
DESCRIPTIO  
■
®
Low Input Offset Voltage: 500µV Max  
The LT 1490A/LT1491A are dual and quad op amps with a  
Output Swings to 10mV Max from V–  
Rail-to-Rail Input and Output  
■
lowinputoffsetvoltageof500µVmax.TheLT1490A/LT1491A  
operate on all single and split supplies with a total voltage of  
2V to 44V, drawing only 40µA of quiescent current per  
amplifier. These amplifiers are reverse supply protected;  
they draw virtually no current for reverse supply up to 18V.  
The input range of the LT1490A/LT1491A includes both  
suppliesandtheoutputswingstobothsupplies. Unlikemost  
micropower op amps, the LT1490A/LT1491A can drive  
heavy loads; their rail-to-rail outputs drive 20mA. The  
LT1490A/LT1491A are unity-gain stable and drive all capaci-  
tive loads up to 10,000pF when optional 0.22µF and 150Ω  
compensation is used.  
■
■
■
Micropower: 50µA/Amplifier Max  
Over-The-Top® Input Common Mode Range Extends  
44V Above V–, Independent of V+  
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  
Tiny 3mm × 3mm × 0.8mm DFN Package  
■
■
■
■
■
■
■
■
■
■
The LT1490A/LT1491A 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 resistors  
protect the inputs for faults below the negative supply up to  
15V. There is no phase reversal of the output for inputs 15V  
U
APPLICATIO S  
■
Battery- or Solar-Powered Systems  
Portable Instrumentation  
Sensor Conditioning  
–
–
+
below V or 44V above V , independent of V .  
■
Supply Current Sensing  
The LT1490A dual op amp is available in the 8-pin MSOP,  
PDIP and SO packages. For space limited applications  
LT1490A is available in a 3mm × 3mm × 0.8mm, dual fine  
pitchleadlesspackage(DFN). ThequadLT1491Aisavailable  
in the 14-pin SO, PDIP and 5mm × 3mm × 0.8mm DFN  
packages.  
■
Battery Monitoring  
■
Micropower Active Filters  
■
4mA to 20mA Transmitters  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Over-The-Top is a registered trademark of Linear Technology Corporation.  
Protected by U.S. Patents including 5825228.  
U
Battery Monitor  
TYPICAL APPLICATIO  
R
R
S
A
0.2Ω  
2k  
Q1  
2N3904  
CHARGER  
VOLTAGE  
+
R
A
I
´
1/4 LT1491A  
BATT  
–
2k  
1/4 LT1491A  
LOGIC  
–
+
R
B
Q2  
2N3904  
2k  
LOGIC HIGH (5V) = CHARGING  
LOGIC LOW (0V) = DISCHARGING  
+
R
B
´
1/4 LT1491A  
2k  
–
LOAD  
+
+
R
G
1/4 LT1491A  
V
OUT  
10k  
V
BATT  
= 12V  
–
S1  
10k  
90.9k  
1490A TA01  
V
V
=
OUT  
OUT  
S1 = OPEN, GAIN = 1  
S1 = CLOSED, GAIN = 10  
R
= R  
A
S
B
I
=
AMPS  
BATT  
(R )(R /R )(GAIN) GAIN  
V
= 5V, 0V  
S
G
A
sn1490, 14901afbs  
1
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中文翻译

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LT1490ACS8#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT1490AIS8#PBF Linear

类似代替

 LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: SO;
LT1490ACS8#TRPBF Linear

类似代替

 LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: SO;

与LT1490ACS8#PBF相关器件

型号 品牌 获取价格 描述 数据表
LT1490ACS8#TRPBF Linear

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 		LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: SO;
LT1490AHMS8 Linear

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 		Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps
LT1490AHMS8#PBF Linear

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 		Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps
LT1490AHMS8#TR Linear

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 		Operational Amplifier, 2 Func, 3000uV Offset-Max, BIPolar, PDSO8
LT1490AHMS8#TRPBF Linear

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 		LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: MSO
LT1490AHS8 Linear

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 		Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps
LT1490AHS8#TR Linear

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 		LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: SO;
LT1490AHS8#TRPBF Linear

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 		LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: SO;
LT1490AIDD Linear

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 		Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps
LT1490AIDD#PBF Linear

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 		LT1490A - Dual Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps; Package: DFN

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