参数资料
| 型号： | LT1999MPS8-50#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURR SENSE HV 8-MSOP |
| 标准包装： | 100 |
| 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： | 1.2MHz |
| 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： | -55°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
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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