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LT6105HMS8-PBF

更新时间： 2024-11-25 05:43:35
品牌 Logo 应用领域
凌特 - Linear 放大器功率放大器
页数 文件大小 规格书
20页 375K
描述
Precision, Extended Input Range Current Sense Amplifi er

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LT6105HMS8-PBF 数据手册

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LT6105  
Precision, Extended Input  
Range Current Sense Amplifier  
FEATURES  
DESCRIPTION  
Very Wide,Over-the-Top®, Input Common Mode Range  
The LT®6105 is a micropower, precision current sense  
amplifier with a very wide input common mode range.  
The LT6105 monitors unidirectional current via the volt-  
age across an external sense resistor. The input common  
mode range extends from –0.3V to 44V, with respect to  
n
–
+
- Extends 44V Above V (Independent of V )  
–
- Extends –0.3V Below V  
n
n
n
n
n
n
n
n
n
n
Wide Power Supply Range: 2.85V to 36V  
Input Offset Voltage: 300μV Maximum  
Gain Accuracy: 1% Max  
–
the negative supply voltage (V ). This allows the LT6105  
Gain Configurable with External Resistors  
Operating Current: 150μA  
Slew Rate: 2V/μs  
Sense Input Current When Powered Down: 1nA  
Full-Scale Output Current: 1mA Minimum  
Operating Temperature Range –40°C to 125°C  
Available in 2mm × 3mm DFN and 8-Lead MSOP  
Packages  
to operate as a high side current sense monitor or a low  
side current sense monitor. It also allows the LT6105 to  
monitor current on a negative supply voltage, as well as  
continuouslymonitorabatteryfromfullchargetodepletion.  
The inputs of LT6105 can withstand differential voltages  
up to 44V, which makes it ideal for monitoring a fuse or  
MOSFET switch.  
Gain is configured with external resistors from 1V/V to  
100V/V. The input common mode rejection and power  
supplyrejectionareinexcessof100dBandtheinputoffset  
voltage is less than 300μV. A typical slew rate of 2V/μs  
ensures fast response to unexpected current changes.  
APPLICATIONS  
n
High Side or Low Side Current Sensing  
n
Current Monitoring on Positive or Negative Supply  
The LT6105 can operate from an independent power  
supply of 2.85V to 36V and draws only 150μA. When  
Voltages  
Battery Monitoring  
Fuse/MOSFET Monitoring  
Automotive  
Power Management  
Portable Test/Measurement Systems  
n
+
V is powered down, the sense pins are biased off. This  
n
prevents loading of the monitored circuit, irrespective of  
the sense voltage. The LT6105 is available in a 6-lead DFN  
and 8-lead MSOP package.  
n
n
n
, LT, LTC, LTM and Over-the-Top are registered trademarks of Linear Technology  
Corporation. All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Gain Error vs Input Voltage  
4
+
V
V
R
A
= 12V  
= 50mV  
= 100Ω  
= 50V  
Gain of 50 Current Sense Amplifier  
SENSE  
3
2
IN  
V
SOURCE  
LT6105  
–0.3V TO 44V  
R
IN2  
T
= –40°C  
A
+
V
1
100Ω  
S
+IN  
–IN  
+
–
T
= 25°C  
A
V
0
OUT  
R
100Ω  
0.02Ω  
V
= 1V/A  
IN1  
OUT  
–1  
–2  
–3  
–4  
R
OUT  
4.99k  
T
= 125°C  
T = 85°C  
A
A
–
V
S
+
–
V
V
TO LOAD  
2.85V TO 36V  
6105 TA01  
ROUT  
RIN  
ROUT  
+
−
0
5
10 15 20 25 30 35 40 45  
+
VOUT = V − VS  
•
;
AV  
=
; RIN1 = RIN2 = RIN  
(
)
S
RIN  
V
INPUT VOLTAGE (V)  
6105 TA01b  
S
6105fa  
1
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