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LM3822MMX-1.0 PDF预览

LM3822MMX-1.0

更新时间： 2024-11-08 19:21:31
品牌 Logo 应用领域
德州仪器 - TI 光电二极管
页数 文件大小 规格书
14页 363K
描述
SPECIALTY ANALOG CIRCUIT, PDSO8, MSOP-8

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LM3822MMX-1.0 技术参数

生命周期：Obsolete零件包装代码：MSOP
包装说明：TSSOP,针数：8
Reach Compliance Code：unknownHTS代码：8542.39.00.01
风险等级：5.59模拟集成电路 - 其他类型：ANALOG CIRCUIT
JESD-30 代码：R-PDSO-G8长度：3 mm
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
座面最大高度：1.09 mm最大供电电压 (Vsup)：5.25 V
最小供电电压 (Vsup)：2 V标称供电电压 (Vsup)：3.6 V
表面贴装：YES温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL宽度：3 mm
Base Number Matches：1

LM3822MMX-1.0 数据手册

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OBSOLETE  
LM3822  
www.ti.com  
SNVS064C –JULY 2000–REVISED APRIL 2013  
LM3822 Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM  
Output  
Check for Samples: LM3822  
1
FEATURES  
DESCRIPTION  
The LM3822 Current Gauge provides easy to use  
precision current measurement with virtually zero  
insertion loss (typically 0.003Ω). The LM3822 is used  
for high-side sensing.  
2
•
No External Sense Element Required  
•
PWM Output Indicates the Current Magnitude  
and Direction  
•
PWM Output is Easily Interfaced with  
Microprocessors and Controllers  
A
Delta Sigma analog to digital converter is  
incorporated to precisely measure the current and to  
provide a current averaging function. Current is  
averaged over 50 msec time periods in order to  
provide immunity to current spikes. The ICs have a  
pulse-width modulated (PWM) output which indicates  
the current magnitude and direction. The shutdown  
pin can be used to inhibit false triggering during start-  
up, or to enter a low quiescent current mode.  
•
•
•
•
•
Precision ΔΣ Current-Sense Technique  
Low Temperature Sensitivity  
Internal Filtering Rejects False Trips  
Internal Power-On-Reset (POR)  
DC Offset is Less than 1 mA for 1A Part  
APPLICATIONS  
The LM3822 is factory-set in two different current  
options. The sense range is −1.0A to +1.0A or −2.0A  
to +2.0A. The sampling interval for this part is 50ms.  
If faster sampling is desired, please refer to the data  
sheet for the part number LM3824.  
•
•
•
Battery Charge/Discharge Gauge  
Motion Control Diagnostics  
Power Supply Load Monitoring and  
Management  
•
Resettable Smart Fuse  
KEY SPECIFICATIONS  
•
•
•
Ultra Low Insertion Loss (Typically 0.003Ω)  
2V to 5.5V Supply Range  
±2% Accuracy at Room Temperature for the 1A  
Device (Includes Accuracy of the Internal  
Sense Element)  
•
Low Quiescent Current in Shutdown Mode  
(Typically 1.8 µA)  
•
•
50 msec Sampling Interval  
In MSOP-8 Package  
Connection Diagram  
Figure 1. Top View  
LM3822 for High-Side Sensing  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2000–2013, Texas Instruments Incorporated  
1234567...14

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