參數(shù)資料
型號(hào)： EVAL-ADUC834QSZ
廠商： Analog Devices Inc
文件頁數(shù)： 15/80頁
文件大?。?/td> 0K
描述： KIT DEV QUICK START ADUC834
標(biāo)準(zhǔn)包裝： 1
系列： QuickStart™ 套件
類型： MCU
適用于相關(guān)產(chǎn)品： ADuC834
所含物品： 評(píng)估板，線纜，電源，軟件和文檔
REV. A
–22–
ADuC834
PRIMARY AND AUXILIARY ADC NOISE
PERFORMANCE
Tables X, XI, and XII show the output rms noise in V and
output peak-to-peak resolution in bits (rounded to the nearest
0.5 LSB) for some typical output update rates on both the primary
and auxiliary ADCs. The numbers are typical and are generated
at a differential input voltage of 0 V. The output update rate is
selected via the Sinc Filter (SF) SFR. It is important to note
that the peak-to-peak resolution figures represent the resolution
for which there will be no code flicker within a six-sigma limit.
The QuickStart Development system PC software comes
complete with an ADC noise evaluation tool. This tool can be
easily used with the evaluation board to see these figures from
silicon.
Table X. Primary ADC, Typical Output RMS Noise ( V)
Typical Output RMS Noise vs. Input Range and Update Rate; Output RMS Noise in
V
SF
Data Update
Input Range
Word
Rate (Hz)
20 mV
40 mV
80 mV
160 mV
320 mV
640 mV
1.28 V
2.56 V
13
105.3
1.50
1.60
1.75
3.50
4.50
6.70
11.75
69
19.79
0.60
0.65
0.95
1.40
2.30
255
5.35
0.35
0.37
0.51
0.82
1.25
Table XI. Primary ADC, Peak-to-Peak Resolution (Bits)
Peak-to-Peak Resolution vs. Input Range and Update Rate; Peak-to-Peak Resolution in Bits
SF
Data Update
Input Range
Word
Rate (Hz)
20 mV
40 mV
80 mV
160 mV
320 mV
640 mV
1.28 V
2.56 V
13
105.3
12
13
14
15
15.5
16
69
19.79
13.5
14
15
16
17
17.5
18
18.5
255
5.35
14
15
16
17
18
18.5
19
19.5
Typical RMS Resolution vs. Input Range and Update Rate: RMS Resolution in Bits
*
SF
Data Update
Input Range
Word
Rate (Hz)
20 mV
40 mV
80 mV
160 mV
320 mV
640 mV
1.28 V
2.56 V
13
105.3
14.7
15.7
16.7
17.7
18.2
18.7
69
19.79
16.2
16.7
17.7
18.7
19.7
20.2
20.7
21.2
255
5.35
16.7
17.7
18.7
19.7
20.7
21.2
21.7
22.2
*Based on a six-sigma limit, the rms resolution is 2.7 bits greater than the peak-to-peak resolution.
Table XII. Auxiliary ADC
Typical Output RMS Noise vs. Update Rate
*
Output RMS Noise in
V
SF
Data Update
Input Range
Word
R
ate (Hz)
2.5 V
13
105.3
10.75
69
19.79
2.00
255
5.35
1.15
*ADC converting in Bipolar mode
Peak-to-Peak Resolution vs. Update Rate
1
Peak-to-Peak Resolution in Bits
SF
Data Update
Input Range
Word
Rate (Hz)
2.5 V
13
105.3
16
2
69
19.79
16
255
5.35
16
NOTES
1ADC converting in Bipolar mode
2In Unipolar mode, peak-to-peak resolution at 105 Hz is 15 bits.
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