and it is not referenced to ana" />
參數(shù)資料
型號(hào)： 101-1157
廠商： Rabbit Semiconductor
文件頁數(shù)： 51/112頁
文件大小： 0K
描述： KIT DEVELOPMENT USA RCM4100
標(biāo)準(zhǔn)包裝： 1
系列： RabbitCore 4000
類型： MPU 模塊
適用于相關(guān)產(chǎn)品： RCM4100
所含物品： RabbitCore 模塊、開發(fā)板、交流適配器、纜線和 Dynamic C? 光盤
其它名稱： 316-1123
User’s Manual
39
If a device such as a battery is
connected across two channels
for a differential measurement,
and it is not referenced to
analog ground, then the current
from the device will flow
through both sets of attenuator
resistors without flowing back
to analog ground as shown in
Figure 10. This will generate a
negative voltage at one of the
inputs, LN1, which will almost
certainly lead to inaccurate A/D
conversions. To make such differential measurements, connect the R1 resistors to the A/D
converter’s internal reference voltage, which is software-configurable for 1.15 V, 2.048 V,
or 2.5 V. This internal reference voltage is available on pin 49 of header J3 as VREF, and
allows you to convert analog input voltages that are negative with respect to analog ground.
NOTE: The amplifier inside the A/D converter’s internal voltage reference circuit has a
very limited output-current capability. The internal buffer can source up to 20 mA and
sink only up to 200 A. Use a separate buffer amplifier if you need to supply any load
current.
The A/D converter’s CONVERT pin is available on pin 48 of header J3 and can be used as
a hardware means of forcing the A/D converter to start a conversion cycle at a specific time.
The CONVERT signal is an edge-triggered event and has a hold time of two CCLK periods
for debounce.
A conversion is started by an active (rising) edge on the CONVERT pin. The CONVERT
pin must stay low for at least two CCLK periods before going high for at least two CCLK
periods. Figure 11 shows the timing of a conversion start. The double falling arrow on
CCLK indicates the actual start of the conversion cycle.
Figure 11. Timing Diagram for Conversion Start Using CONVERT Pin
Appendix B.4.3 explains the implementation examples of these features on the Prototyp-
ing Board.
Figure 10. Current Flow from Ungrounded
or Floating Source
R5
R6
2.2 nF
R14
R13
2.2 nF
ADC
AIN0
AIN1
+
I
LN0
LN1
+
-
Device
CCLK
BUSY
CONV
Conversion starts
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參數(shù)描述
101-1158 功能描述:開發(fā)板和工具包 - 其他處理器 RCM4100 Analog Dev Kit (Intl) RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
101-1159 功能描述:射頻開發(fā)工具 WIRELESS CONTROL APP KIT RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V
10-1116.1229 制造商:EAO International 功能描述:LAMP T5.5 36V 37MA
1011160000 功能描述:TERM BLK W/LED 300 10A PA OR RoHS:是 類別:連接器，互連式 >> 接線座 - Din 軌道，通道 系列:W 標(biāo)準(zhǔn)包裝:10 系列:W 類型:饋通式 斷開類型:- 位置數(shù):4 級(jí)別數(shù)目:2 端子 - 寬度:5.1mm 端接類型:螺釘 電流 - IEC:24A 電壓 - IEC:400V 電流 - UL:20A 電壓 - UL:300V 線規(guī)或范圍 - AWG:12-30 AWG 線規(guī)或范圍 - mm²:0.5-4mm² 特點(diǎn):包括端接塊標(biāo)記 顏色:淺褐 保險(xiǎn)絲類型:- 材料 - 絕緣體:熱塑塑膠，Wemid 材料可燃性額定值:UL94 V-0 剝線長度:10mm 其它名稱:WDK2.5/10
10111616001L 制造商:FCI 功能描述:HIGH POWER CARD EDGE VERTICAL TYPE CONNE
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