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LM3814MX-1.0/NOPB PDF预览

LM3814MX-1.0/NOPB

更新时间： 2024-09-18 21:17:51
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 708K
描述
2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8

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LM3814MX-1.0/NOPB 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：SOP, SOP8,.25Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.7可调阈值：NO
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G8
JESD-609代码：e3长度：4.9 mm
湿度敏感等级：1信道数量：2
功能数量：1端子数量：8
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP8,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Power Management Circuits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)：5 V
表面贴装：YES技术：CMOS
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：3.9 mm
Base Number Matches：1

LM3814MX-1.0/NOPB 数据手册

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February 2005  
LM3814/LM3815  
Fast Current Gauge IC with Ultra Low Loss Sense  
Element and PWM Output  
n
3.5% accuracy at room temperature (includes  
accuracy of the internal sense element) (LM3814-1.0,  
LM3815-1.0)  
General Description  
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.  
n Low quiescent current in shutdown mode (typically 2.5  
µA)  
n 6 msec sampling interval  
A Delta Sigma analog to digital converter is incorporated to  
precisely measure the current and to provide a current av-  
eraging function. Current is averaged over 6 msec time  
periods in order to provide immunity to current spikes. The  
ICs have a pulse-width modulated (PWM) output which indi-  
cates 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.  
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  
current options. The sense range is −1A to +1A or −7A to  
+7A. The user specifies a particular part number to match  
the current 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  
Key Specifications  
n Ultra low insertion loss (typically 0.004Ω)  
n 2V to 5.25V supply range  
Connection Diagrams  
10101303  
Top View  
LM3815  
10101301  
Top View  
LM3814  
for Low-Side Sensing  
for High-Side Sensing  
© 2005 National Semiconductor Corporation  
DS101013  
www.national.com  
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