參數(shù)資料
型號： 101-1102
廠商： Rabbit Semiconductor
文件頁數(shù)： 50/112頁
文件大?。?/td> 0K
描述： KIT DEV RABBIT RCM4100 INTL
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，纜線和 Dynamic C? CD-Rom
38
RabbitCore RCM4100
4.4 A/D Converter (RCM4100 only)
The RCM4100 has an onboard ADS7870 A/D converter whose scaling and filtering are
done via the motherboard on which the RCM4100 module is mounted. The A/D converter
multiplexes converted signals from eight single-ended or four differential inputs to Serial
Port B on the Rabbit 4000.
The eight analog input pins, LN0–LN7, each have an input impedance of 6–7 M
,
depending on whether they are used as single-ended or differential inputs. The input signal
can range from -2 V to +2 V (differential mode) or from 0 V to +2 V (single-ended mode).
Use a resistor divider such as the one shown in Figure 9 to measure voltages above 2 V on
the analog inputs. See Appendix B.4.3 for information on how to measure negative voltages.
Figure 9. Resistor Divider Network for Analog Inputs
The R1 resistors are typically 20 k
to 100 k, with a lower resistance leading to more
accuracy, but at the expense of a higher current draw. The R0 resistors would then be
180 k
to 900 k for a 10:1 attenuator. The capacitor filters noise pulses on the A/D
converter input.
The actual voltage range for a signal going to the A/D converter input is also affected by
the 1, 2, 4, 5, 8, 10, 16, and 20 V/V software-programmable gains available on each channel
of the ADS7870 A/D converter. Thus, you must scale the analog signal with an attenuator
circuit and a software-programmable gain so that the actual input presented to the A/D
converter is within the range limits of the ADS7870 A/D converter chip (-2 V to + 2 V or
0 V to + 2 V).
The A/D converter chip can only accept positive voltages. With the R1 resistors connected
to ground, your analog circuit is well-suited to perform positive A/D conversions. When
the R1 resistors are tied to ground for differential measurements, both differential inputs
must be referenced to analog ground, and both inputs must be positive with respect to
analog ground.
R0
LN0
AGND
LN1
ADC
BVREF
R0
C
R1
C
ADC
(RCM4100)
1
3
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101-1104 功能描述:處理器配件 USB xd READER RoHS:否 制造商:Olimex Ltd. 產(chǎn)品:Cable 用于:
101110-7 制造商:n/a 功能描述:Power SCR
101-1108 功能描述:可編程邏輯 IC 開發(fā)工具 Rabbit Embedded PLC APP KIT US RoHS:否 制造商:Altera Corporation 產(chǎn)品:Development Kits 類型:FPGA 工具用于評估:5CEFA7F3 接口類型: 工作電源電壓:
101-1109 功能描述:KIT EMBEDDED PLC APPLICATION RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 通用嵌入式開發(fā)板和套件（MCU、DSP、FPGA、CPLD等） 系列:Coyote™ 產(chǎn)品培訓(xùn)模塊:Blackfin® Processor Core Architecture Overview Blackfin® Device Drivers Blackfin® Optimizations for Performance and Power Consumption Blackfin® System Services 特色產(chǎn)品:Blackfin? BF50x Series Processors 標(biāo)準(zhǔn)包裝:1 系列:Blackfin® 類型:DSP 適用于相關(guān)產(chǎn)品:ADSP-BF548 所含物品:板，軟件，4x4 鍵盤，光學(xué)撥輪，QVGA 觸摸屏 LCD 和 40G 硬盤 配用:ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARDADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE 相關(guān)產(chǎn)品:ADSP-BF542BBCZ-4A-ND - IC DSP 16BIT 400MHZ 400CSBGAADSP-BF544MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542KBCZ-6A-ND - IC DSP 16BIT 600MHZ 400CSBGAADSP-BF547MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF548BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF547BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF544BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF542BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGA
10-1110B 制造商:Datak Corporation 功能描述:
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