參數(shù)資料
型號： 101-1218
廠商： Rabbit Semiconductor
文件頁數(shù)： 16/130頁
文件大?。?/td> 0K
描述： KIT APPLCTN RABBITCORE RCM4010
標(biāo)準(zhǔn)包裝： 1
系列： RabbitCore®
主要目的： *
嵌入式： *
已用 IC / 零件： RCM4010
主要屬性： *
次要屬性： *
已供物品： 板，模塊，250GB 網(wǎng)絡(luò)驅(qū)動器，線纜，CD，電源
其它名稱： 316-1156
106
RabbitCore RCM4000
B.4.3 Analog Features (RCM4000 only)
The Prototyping Board has typical support circuitry installed to complement the ADS7870
A/D converter on the RCM4000 module (the A/D converter is not available on the
RCM4010 module).
B.4.3.1 A/D Converter Inputs
Figure B-6 shows a pair of A/D converter input circuits. The resistors form an approx. 11:1
attenuator, and the capacitor filters noise pulses from the A/D converter input. The 470
inline jumpers allow other configurations (see Table B-6) and provide digital isolation when
you are not using an A/D converter (Parallel Port D is available). These jumpers optimize
using RabbitCore modules with or without A/D converters—if you are designing your own
circuit, the best performance for the A/D converter would be realized with 0
resistors.
Figure B-6. A/D Converter Inputs
The A/D converter chip can make either single-ended or differential measurements
depending on the value of the opmode parameter in the software function call. Adjacent
A/D converter inputs are paired to make differential measurements. The default setup on
the Prototyping Board is to measure only positive voltages for the ranges listed in Table B-3.
Table B-3. Positive A/D Converter Input Voltage Ranges
Min. Voltage
(V)
Max. Voltage
(with prescaler)
(V)
Gain
Multiplier
A/D Converter
Actual Gain
Resolution
(mV)
0.0
+22.528
×1
1
11
0.0
+11.264
×2
1.8
5.5
0.0
+5.632
×4
3.6
2.75
0.0
+4.506
×5
4.5
2.20
0.0
+2.816
×8
7.2
1.375
0.0
+2.253
×10
9.0
1.100
0.0
+1.408
×16
14.4
0.688
0.0
+1.126
×20
18
0.550
100 kW
LN0_IN
AGND
LN1_IN
ADC
BVREF =
2.048 V
100 kW
2.2 nF
10
k
W
10
k
W
2.2 nF
ADC
(RCM4000)
JP23/JP24
1
3
Inline jumpers are
470 W resistors
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