参数资料
型号: LT1999CS8-20#TRPBF
厂商: Linear Technology
文件页数: 1/24页
文件大小: 0K
描述: IC AMP CURR SENSE HV 8-SOIC
标准包装: 2,500
放大器类型: 电流检测
电路数: 1
输出类型: 带缓冲
转换速率: 3 V/µs
-3db带宽: 2MHz
电流 - 输入偏压: 137.5µA
电压 - 输入偏移: 500µV
电流 - 电源: 5.8mA
电流 - 输出 / 通道: 40mA
电压 - 电源,单路/双路(±): 4.5 V ~ 5.5 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SO
包装: 带卷 (TR)
LT1999-10/LT1999-20/
LT1999-50
1
1999fb
Typical applicaTion
FeaTures
DescripTion
High Voltage, Bidirectional
Current Sense Amplifier
The LT1999 is a high speed precision current sense
amplifier, 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.
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 monitoring
currents in H-Bridge motor controls, switching power
supplies, solenoid currents, and battery charge currents
from full charge to depletion.
The LT1999 operates from an independent 5V supply and
draws 1.55mA. A shutdown mode is provided for minimiz-
ing power consumption.
The LT1999 is available in an 8-lead MSOP or SOP package.
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.
applicaTions
n
Buffered Output with 3 Gain Options:
10V/V, 20V/V, 50V/V
n
Gain Accuracy: 0.5% Max
n
Input Common Mode Voltage Range: –5V to 80V
n
AC CMRR > 80dB at 100kHz
n
Input Offset Voltage: 1.5mV Max
n
–3dB Bandwidth: 2MHz
n
Smooth, Continuous Operation Over Entire Common
Mode Range
n
4kV HBM Tolerant and 1kV CDM Tolerant
n
Low Power Shutdown <10A
n
–55°C to 150°C Operating Temperature Range
n
8-Lead MSOP and 8-Lead SO (Narrow) Packages
n
High Side or Low Side Current Sensing
n
H-Bridge Motor Control
n
Solenoid Current Sense
n
High Voltage Data Acquisition
n
PWM Control Loops
n
Fuse/MOSFET Monitoring
Full Bridge Armature Current Monitor
TIME (10s/DIV)
2.5V
V OUT
(2V
/DIV)
V
+IN
(20V
/DIV)
1999 TA01b
VOUT
V+IN
LT1999
4k
0.8k
160k
2A
0.8k
4k
SHDN
5V
V+
5V
RS
1999 TA01a
+
+
VS
8
1
2
3
4
7
6
5
0.1F
VOUT
RG
V+IN
V–IN
VREF
VSHDN
V+
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