- 您现在的位置：买卖IC网 > PDF目录16694 > WI125 EVAL KIT (Connor-Winfield)GPS TIMING RECEIVER EVAL BOARD PDF资料下载
参数资料
| 型号： | WI125 EVAL KIT |
| 厂商： | Connor-Winfield |
| 文件页数： | 9/18页 |
| 文件大小： | 0K |
| 描述： | GPS TIMING RECEIVER EVAL BOARD |
| 产品培训模块： | 125 Series GPS Based Timing and Synchronization Products |
| 标准包装： | 1 |
| 主要目的： | 计时，时钟发生器，同步器，GPS |
| 嵌入式： | 否 |
| 已用 IC / 零件： | WI125 |
| 主要属性： | 1PPS/ 10 MHz 相位校准功能 |
| 次要属性： | LED 状态指示器 |
| 已供物品： | 模块，板，天线，线缆，电源 |
| 其它名称： | CW681 W125 EVAL KIT |
Wi125 Data Sheet #:
SG170
Page 17 of 20
Rev:
04
Date:
11/29/11
Copyright 2011 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
Figure 8 Grounding the Wi125 with a Ground Plane
Double via to host
system ground at this
one point. Digital and
RF grounds common
at this point.
8 APPLICATION HINTS continued
8.3 Grounding
InconnectingtheWi125intoahostsystem,goodgroundingpracticesshouldbeobserved.Specifically,ground
currentsfromtherestofthesystemhostingtheWi125shouldnotpassthroughthegroundconnectionstothe
Wi125.Thisismosteasilyensuredbyusingasinglepointattachmentfortheground.Theremustalsobeagood
connectionbetweentheRF_GNDandtheDIG_GNDsignals.Whilethereisnotaspecificneedtoputaground
planeundertheWi125,highenergysignalsshouldnotbetrackedundertheWi125.Itishoweverrecommended
thatagroundplanebeusedundertheWi125.Inthiscase,thefollowingwouldbeanexampleofthepatternthat
maybeused
VBATT
DIG_GND
CR2032 Cell
1K
VBATT
DIG_GND
0.47F Supercap
1K
VBATT
DIG_3V3
100R
Figure 7 Typical VBATT Supplies
8.4 Battery Backup
TheWi125hasanon-boardrealtimeclock(RTC).ThisisusedtostoredateandtimeinformationwhiletheWi125
ispowereddown.HavingavaliddateandtimespeedstheTimeToFirstFix(TTFF),allowingtheWi125tomeet
itsquotedTTFFspecification.TheWi125reliesonanexternalpowersourcetopowertheRTC(VBATT)whenthe
DIG_3V3isnotpresent.Iftheuserapplicationdoesnotrequirethewarmorhotfixperformance,ortherequired
informationisprovidedbynetworkassistance,thereisnoneedtoprovidetheVBATTsignal.TheVBATTsignal
mustbegreaterthan2.6VandlessthanDIG_3V3+0.6V.Typically,a3Vlithiumprimarycellorahighcapacity
“supercap”willbeused.TheWi125hasaninternalblockingdiode,soifa“supercap”orrechargeablebatteryis
used,anexternalchargingcircuitwillberequired.
相关PDF资料 |
PDF描述 |
|---|---|
| RBC18DRES | CONN EDGECARD 36POS .100 EYELET |
| ECM25DCMH-S288 | CONN EDGECARD 50POS .156 EXTEND |
| M2MXT-1636J | IDC CABLE - MDM16T/MC16G/X |
| EBM18DCCS-S189 | CONN EDGECARD 36POS R/A .156 SLD |
| RBC08DRYI-S93 | CONN EDGECARD 16POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| WI140266WJ10338BJ1 | 制造商:Vishay Semiconductors 功能描述: |
| WI20C181J100N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:WIRE WOUND INDUCTORS |
| WI20C181J1N2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:WIRE WOUND INDUCTORS |
| WI20C181J1U | 制造商:未知厂家 制造商全称:未知厂家 功能描述:WIRE WOUND INDUCTORS |
| WI20C181J1U2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:WIRE WOUND INDUCTORS |
发布紧急采购，3分钟左右您将得到回复。