Datasheet > LM3814M-1.0

LM3814M-1.0

更新时间： 2024-11-06 22:09:03

品牌	Logo	应用领域
美国国家半导体 - NSC		仪表
页数	文件大小	规格书
14页	267K
描述
Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM3814M-1.0 数据手册

January 1999

LM3814/LM3815

Fast Current Gauge IC with Ultra Low Loss Sense

Element and PWM Output

General Description

Key Specifications

n Ultra low insertion loss (typically 0.004Ω)

n 2V to 5.25V supply range

The LM3814/LM3815 Current Gauges provide easy to use

precision current measurement with virtually zero insertion

loss (typically 0.004Ω). The LM3814 is used for high-side

sensing and the LM3815 is used for low-side sensing.

3.5% accuracy at room temperature (includes

accuracy of the internal sense element) (LM3814-1.0,

LM3815-1.0)

n Low quiescent current in shutdown mode (typically 2.5

A Delta Sigma analog to digital converter is incorporated to

precisely measure the current and to provide a current aver-

aging function. Current is averaged over 6 msec time peri-

ods 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.

µA)

n 6 msec sampling interval

Features

n No external sense element required

n PWM output indicates the current magnitude and

direction

n PWM output can be interfaced with microprocessors

n Precision ∆Σ current-sense technique

n Low temperature sensitivity

n Internal filtering rejects false trips

n Internal Power-On-Reset (POR)

The LM3814 and LM3815 are factory-set in two different cur-

rent options. The sense range is −1A to +1A or −7A to +7A.

The user specifies a particular part number to match the cur-

rent range for a given application. The sampling interval for

these parts is 6ms. If larger sampling interval is desired for

better accuracy, please refer to the data sheets for the part

numbers LM3812 and LM3813.

Applications

n Battery charge/discharge gauge

n Motion control diagnostics

n Power supply load monitoring and management

n Resettable smart fuse

Connection Diagrams

DS101013-1

DS101013-3

Top View

LM3814

for High-Side Sensing

Top View

LM3815

for Low-Side Sensing

DS101013

www.national.com

12 3 4 5 6 7...14

中文翻译

下载PDF

与LM3814M-1.0相关器件

型号	品牌	获取价格	描述	数据表
LM3814M-1.0/NOPB	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8
LM3814M-7.0	NSC	获取价格	Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
LM3814M-7.0/NOPB	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8
LM3814M-7.0/NOPB	ROCHESTER	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8
LM3814MX-1.0	NSC	获取价格	Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
LM3814MX-1.0	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8
LM3814MX-1.0/NOPB	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8
LM3814MX-7.0	NSC	获取价格	Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
LM3814MX-7.0	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8
LM3814MX-7.0/NOPB	TI	获取价格	2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8

与LM3814M-1.0相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

19
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

16
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

39
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

37

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3814M-1.0

LM3814M-1.0 数据手册

与LM3814M-1.0相关器件

与LM3814M-1.0相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3814M-1.0

LM3814M-1.0 数据手册

与LM3814M-1.0相关器件

与LM3814M-1.0相关文章

您还可以找

您在本页遇到什么问题？