參數(shù)資料
型號(hào): ADUC814
廠商: Analog Devices, Inc.
英文描述: MicroConverter, Small Package 12-Bit ADC with Embedded Flash MCU
中文描述: MicroConverter的,小包裝12位ADC,嵌入式閃存MCU
文件頁(yè)數(shù): 15/72頁(yè)
文件大?。?/td> 846K
代理商: ADUC814
ADuC814
Figure 13 and Figure 14 show typical FFT plots for the ADuC814.
These plots were generated using an external clock input via
P3.5 to achieve coherent sampling. The ADC is using its internal
reference (2.5 V) sampling a full-scale, 10 kHz sine wave test
tone input at a sampling rate of 149.79 kHz. The resultant FFTs
shown at 5 V and 3 V supplies illustrate an excellent 100 dB
noise floor, a 71 dB signal-to-noise ratio (SNR), and a THD
greater than 80 dB.
Rev. A | Page 15 of 72
20
0
–20
–40
–60
–80
–100
–120
–140
–160
d
20
FREQUENCY (kHz)
10
0
70
60
50
40
30
0
AV
/DV
= 5V
f
S
= 149.79kHz
f
= 9.910kHz
SNR = 71.3dB
THD = –88.0dB
ENOB = 11.6
Figure 13. ADuC814 Dynamic Performance at V
DD
= 5 V
20
0
–20
–40
–60
–80
–100
–120
–140
–160
d
20
FREQUENCY (kHz)
10
0
70
60
50
40
30
0
AV
/DV
= 3V
f
S
= 149.79kHz
f
= 9.910kHz
SNR = 71.3dB
THD = –88.0dB
ENOB = 11.6
Figure 14. ADuC814 Dynamic Performance at V
DD
= 3 V
Figure 15 and Figure 16 show typical dynamic performance
versus external reference voltages. Again excellent ac performance
can be observed in both plots with some roll-off being observed
as V
REF
falls below 1 V.
EXTERNAL REFERENCE (V)
50
0.5
S
1.0
2.0
2.5
5.0
55
1.5
60
65
70
75
80
T
–100
–95
–90
–85
–80
–75
–70
AV
/DV
= 5V
f
S
= 152kHz
SNR
THD
0
Figure 15. Typical Dynamic Performance vs. V
REF
, V
DD
= 5 V
EXTERNAL REFERENCE (V)
S
80
75
65
50
70
55
AV
DD
/DV
DD
= 3V
f
S
= 152kHz
0.5
1.5
2.5
T
SNR
THD
60
–70
–75
–85
–100
–80
–95
–90
1.0
2.0
3.0
0
Figure 16. Typical Dynamic Performance vs. V
REF
, V
DD
= 3 V
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