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參數(shù)資料
| 型號(hào)： | AD977 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 16-Bit, 100 kSPS BiCMOS A/D Converter(100kSPS 16位A/D轉(zhuǎn)換器) |
| 中文描述： | 16位，100 kSPS的BiCMOS工藝的A / D轉(zhuǎn)換器（100ksps的16位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 20/24頁 |
| 文件大?。?/td> | 287K |
| 代理商： | AD977 |
AD977/AD977A
–20–
REV. A
POSITIVE INL – LSB
0
50
10
25
20
15
40
35
45
N
5
0
30
0
0
0
0
0
0
0
1
1
1
2
1
1
1
1
1
2
2
2
2
2
2
2
2
Figure 20. Typical Positive INL Distribution (999 Units)
NEGATIVE INL – LSB
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
60
30
20
50
N
10
0
40
–
Figure 21. Typical Negative INL Distribution (999 Units)
SNR+D (dB) FOR AD977A
90
80
70
60
50
40
30
20
10
S
I
1
10
100
1000
INPUT SIGNAL FREQUENCY – kHz
SNR+D (dB) FOR AD977
Figure 22. S/(N+D) vs. Input Frequency
TEMPERATURE – C
110
100
80
–75
150
–50
S
–25
0
25
50
75
100
125
90
105
95
85
–80
–90
–110
–100
–85
–95
–105
SFDR
THD
SNRD
T
Figure 23. AC Parameters vs. Temperature
DC CODE UNCERTAINTY
Ideally, a fixed dc input should result in the same output code
for repetitive conversions; however, as a consequence of un-
avoidable circuit noise within the wideband circuits of the ADC,
a range of output codes may occur for a given input voltage.
Thus, when a dc signal is applied to the AD977/AD977A input
and 10,000 conversions are recorded, the result will be a distri-
bution of codes as shown in Figure 24. This histogram shows a
bell shaped curve consistent with the Gaussian nature of thermal
noise. The histogram is approximately seven codes wide. The
standard deviation of this Gaussian distribution results in a code
transition noise of 1 LSB rms.
4000
3500
0
–3
2000
1500
1000
500
3000
2500
–2
–1
0
1
2
3
4
Figure 24. Histogram of 10,000 Conversions of a DC Input
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