- 您现在的位置：买卖IC网 > PDF目录44573 > LM98640W-MPR (NATIONAL SEMICONDUCTOR CORP) SPECIALTY ANALOG CIRCUIT, CQFP68 PDF资料下载
参数资料
| 型号： | LM98640W-MPR |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, CQFP68 |
| 封装： | CERAMIC, QFP-68 |
| 文件页数： | 29/50页 |
| 文件大小： | 1688K |
| 代理商： | LM98640W-MPR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页当前第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页
Supply/Grounding, Layout and
Thermal Recommendations
Power Planes
Power for the LM98640QML should be provided through a
broad plane which is located on one layer adjacent to the
ground plane(s). Placing the power and ground planes on
adjacent layers will provide low impedance decoupling of the
AFE supplies, especially at higher frequencies. The output of
a linear regulator should feed into the power plane through a
low impedance multi-via connection. The power plane should
be split into individual power peninsulas near the AFE. Each
peninsula should feed a particular power bus on the AFE, with
decoupling for that power bus connecting the peninsula to the
ground plane near each power/ground pin pair. Using this
technique can be difficult on many printed circuit CAD tools.
To work around this, zero ohm resistors can be used to con-
nect the power source net to the individual nets for the differ-
ent AFE power buses. As a final step, the zero ohm resistors
can be removed and the plane and peninsulas can be con-
nected manually after all other error checking is completed.
Bypass Capacitors
The general recommendation is to have one 100nF capacitor
for each power/ground pin pair. The capacitors should be
surface mount multi-layer ceramic chip capacitors.
Ground Plane
Grounding should be done using continuous full ground
planes to minimize the impedance for all ground return paths,
and provide the shortest possible image/return path for all
signal traces.
Thermal Management
The exposed pad on bottom of the package is attached to the
back of the die to act as a heat sink. Connecting this pad to
the PCB ground planes with a low thermal resistance path is
the best way to remove heat from the AFE. This pad should
also be connected to the ground planes through low
impedance path for electrical purposes.
Radiation Environments
Careful consideration should be given to environmental con-
ditions when using a product in a radiation environment.
Total Ionizing Dose
Testing and qualification of this product is done on a wafer
level according to MIL-STD-883, Test Method 1019. Wafer
level TID data is available with lot shipments.
Single Event Latch-Up and Functional Interrupt
One time single event latch-up (SEL) and single event func-
tional interrupt (SEFI) testing was preformed according to
EIA/JEDEC Standard, EIA/JEDEC57. SEL testing was con-
ducted with the junction temperature at 125°C. The linear
energy transfer threshold (LETth) shown in the Key Specifi-
cations table on the front page is the maximum LET tested. A
test report is available upon request.
Single Event Effects
A report on single event upset (SEU) is available upon re-
quest.
35
www.national.com
LM98640QML
相关PDF资料 |
PDF描述 |
|---|---|
| LMC555CBP/NOPB | PULSE; RECTANGULAR, 3 MHz, TIMER, PBGA8 |
| 5962-8950305PA | PULSE; RECTANGULAR, 3 MHz, TIMER, CDIP8 |
| LMC555M | PULSE; RECTANGULAR, 3 MHz, TIMER, PDSO8 |
| LMC555ENG | PULSE; RECTANGULAR, 3 MHz, TIMER, PDIP8 |
| LMH6580VSX | 8-CHANNEL, CROSS POINT SWITCH, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM98704CCMT/NOPB | 制造商:Texas Instruments 功能描述: |
| LM98714 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Three Channel, 16-Bit, 45 MSPS Digital Copier Analog Front End with Integrated CCD/CIS Sensor Timing Generator and LVDS Output |
| LM98714BCMT | 制造商:Texas Instruments 功能描述:AFE Video 1ADC 16-Bit 3.3V 48-Pin TSSOP Rail |
| LM98714BCMT/NOPB | 功能描述:ADC / DAC多通道 16B,45MSPS Digital Copier AFE RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| LM98714BCMTX/NOPB | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
发布紧急采购，3分钟左右您将得到回复。