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LT1999-50_15

更新时间： 2024-11-30 01:11:59
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
26页 1003K
描述
High Voltage, Bidirectional Current Sense Amplifier

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中文翻译

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LT1999-50_15 数据手册

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LT1999-10/LT1999-20/  
LT1999-50  
High Voltage, Bidirectional  
Current Sense Amplifier  
FeaTures  
DescripTion  
The LT®1999 is a high speed precision current sense am-  
plifier, designed to monitor bidirectional currents over a  
wide common mode range. The LT1999 is offered in three  
gain options: 10V/V, 20V/V, and 50V/V.  
n
Buffered Output with 3 Gain Options:  
10V/V, 20V/V, 50V/V  
Gain Accuracy: 0.5% Max  
Input Common Mode Voltage Range: –5V to 80V  
AC CMRR > 80dB at 100kHz  
Input Offset Voltage: 1.5mV Max  
–3dB Bandwidth: 2MHz  
Smooth, Continuous Operation Over Entire Common  
n
n
n
The LT1999 senses current via an external resistive shunt  
andgeneratesanoutputvoltage,indicatingbothmagnitude  
and direction of the sensed current. The output voltage is  
referencedhalfwaybetweenthesupplyvoltageandground,  
or an external voltage can be used to set the reference  
level. With a 2MHz bandwidth and a common mode input  
range of –5V to 80V, the LT1999 is suitable for monitor-  
ing currents in H-Bridge motor controls, switching power  
supplies, solenoid currents, and battery charge currents  
from full charge to depletion.  
n
n
n
Mode Range  
4kV HBM Tolerant and 1kV CDM Tolerant  
Low Power Shutdown <10µA  
–55°C to 150°C Operating Temperature Range  
8-Lead MSOP and 8-Lead SO (Narrow) Packages  
8-Lead MSOP Pinout Option Engineered for FMEA  
n
n
n
n
n
The LT1999 operates from an independent 5V supply  
and draws 1.55mA. A shutdown mode is provided for  
minimizing power consumption.  
applicaTions  
n
n
n
n
n
n
High Side or Low Side Current Sensing  
H-Bridge Motor Control  
Solenoid Current Sense  
High Voltage Data Acquisition  
PWM Control Loops  
Fuse/MOSFET Monitoring  
The LT1999 is available in an 8-lead SOP, an 8-lead MSOP  
(original pinout), or an 8-lead pinout option engineered  
for FMEA.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Typical applicaTion  
Full Bridge Armature Current Monitor  
+
V
LT1999  
V
S
5V  
+
2µA  
V
1
2
8
7
SHDN  
V
SHDN  
2.5V  
R
+
–
G
4k  
V
V
+IN  
–IN  
–
+
R
+
S
V
V
OUT  
REF  
V
0.8k  
0.8k  
+
V
+IN  
V
160k  
160k  
4k  
+
3
4
6
5
5V  
V
0.1µF  
1999 TA01b  
TIME (10µs/DIV)  
0.1µF  
1999 TA01a  
1999fd  
1
For more information www.linear.com/LT1999  
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