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LT6108-1_15 PDF预览

LT6108-1_15

更新时间: 2024-11-26 01:19:47
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
30页 358K
描述
High Side Current Sense Amplifier with Reference and Comparator

LT6108-1_15 数据手册

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LT6108-1/LT6108-2  
High Side Current Sense  
Amplifier with Reference  
and Comparator  
FEATURES  
DESCRIPTION  
The LT®6108 is a complete high side current sense device  
that incorporates a precision current sense amplifier, an  
integrated voltage reference and a comparator. Two ver-  
sions of the LT6108 are available. The LT6108-1 has a  
latching comparator and the LT6108-2 has a non-latching  
comparator. In addition, the current sense amplifier and  
comparatorinputsandoutputsaredirectlyaccessible.The  
amplifier gain and comparator trip point are configured  
by external resistors. The open-drain comparator output  
allows for easy interface to other system components.  
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Current Sense Amplifier  
– Fast Step Response: 500ns  
– Low Offset Voltage: 125µV Maximum  
– Low Gain Error: 0.2% Maximum  
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Internal 400mV Precision Reference  
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Internal Comparator  
– Fast Response Time: 500ns  
– Total Threshold Error: 1.25% Maximum  
– Latching or Non-Latching Comparator Option  
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Wide Supply Range: 2.7V to 60V  
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Supply Current: 450µA  
Low Shutdown Current: 5µA Maximum  
TheoverallpropagationdelayoftheLT6108istypicallyonly  
1.4µs, allowing for quick reaction to overcurrent condi-  
tions. The 1MHz bandwidth allows the LT6108 to be used  
for error detection in critical applications such as motor  
control. The high threshold accuracy of the comparator,  
combined with the ability to latch the comparator, ensures  
the LT6108 can capture high speed events.  
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Specified for –40°C to 125°C Temperature Range  
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Available in 8-Lead MSOP and 8-Lead (2mm × 3mm)  
DFN Packages  
APPLICATIONS  
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Overcurrent and Fault Detection  
The LT6108 is fully specified for operation from –40°C to  
125°C, making it suitable for industrial and automotive  
applications. The LT6108 is available in the small 8-lead  
MSOP and 8-lead DFN packages.  
L, LT, LTC, LTM, TimerBlox, Linear Technology and the Linear logo are registered trademarks  
of Linear Technology Corporation. All other trademarks are the property of their respective  
owners.  
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Current Shunt Measurement  
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Battery Monitoring  
Motor Control  
Automotive Monitoring and Control  
Remote Sensing  
Industrial Control  
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TYPICAL APPLICATION  
Response to Overcurrent Event  
Circuit Fault Protection with Very Fast Latching Load Disconnect  
0.1Ω  
IRF9640  
12V  
TO LOAD  
V
LOAD  
0.1µF  
1k  
100Ω  
10V/DIV  
6.2V*  
0V  
SENSEHI SENSELO  
+
V
V
OUTA  
OUT  
I
3.3V  
LOAD  
LT6108-1  
200mA/DIV  
6.04k  
1.6k  
RESET  
EN/RST  
1k  
10k  
0mA  
250mA DISCONNECT  
V
OUTC  
5V/DIV  
250mA DISCONNECT  
2N2700  
OUTC  
INC  
0V  
V
610812 TA01a  
610812 TA01b  
5µs/DIV  
*CMH25234B  
610812fa  
1

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