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參數資料
| 型號： | AD7922ARM |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 2-Channel, 2.35 V to 5.25 V, 1 MSPS, 10-/12-Bit ADCs |
| 中文描述： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | MO-187AA, MSOP-8 |
| 文件頁數： | 13/32頁 |
| 文件大小： | 386K |
| 代理商： | AD7922ARM |
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AD7912/AD7922
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 10 and Figure 11 show typical FFT plots for the AD7922
and AD7912, respectively, at a 1 MSPS sample rate and 100 kHz
input frequency.
Rev. 0 | Page 13 of 32
Figure 12 shows the SINAD performance versus the input
frequency for various supply voltages while sampling at 1 MSPS
with a SCLK frequency of 18 MHz for the AD7922.
Figure 13 shows the SNR performance versus the input fre-
quency for various supply voltages while sampling at 1 MSPS
with an SCLK frequency of 18 MHz for the AD7922.
Figure 14 and Figure 15 show INL and DNL performance for
the AD7922.
Figure 16 shows a graph of the THD versus the analog input
frequency for different source impedances when using a supply
voltage of 3.6 V and a sampling rate of 1 MSPS. See the Analog
Input section.
Figure 17 shows a graph of the THD versus the analog input
frequency for various supply voltages while sampling at 1 MSPS
with an SCLK frequency of 18 MHz.
Figure 18 shows the shutdown current versus the voltage supply
for different operating temperatures.
5
–15
–35
–55
–75
–95
–1150
50
100
150
200
FREQUENCY (kHz)
250
300
350
400
450
500
0
S
8192 POINT FFT
V
DD
= 2.7V
F
SAMP
= 1MSPS
F
SNR = 73.1dB
SINAD = 72.55dB
THD = –81.78dB
SFDR = –83.03dB
Figure 10. AD7922 Dynamic Performance at 1 MSPS
–10
–30
–50
–70
–90
–1100
50
100
150
200
FREQUENCY (kHz)
250
300
350
400
450
500
0
S
8192 POINT FFT
V
DD
= 2.7V
F
SAMP
= 1MSPS
F
SNR = 61.88dB
SINAD = 61.83dB
THD = –81.12dB
SFDR = –84.92dB
Figure 11. AD7912 Dynamic Performance at 1 MSPS
–67
–74
–73
–72
–71
–70
–69
–68
10
100
1000
0
S
FREQUENCY (kHz)
V
DD
= 2.7V
V
DD
= 2.35V
V
DD
= 5.25V
V
DD
= 4.75V
V
DD
= 3.6V
Figure 12. AD7922 SINAD vs. Input Frequency at 1 MSPS
–71.6
–71.8
–72.0
–72.4
–72.2
–72.6
–72.8
–73.0
–73.2
–73.4
–73.610
100
1000
0
S
FREQUENCY (kHz)
V
DD
= 2.35V
V
DD
= 5.25V
V
DD
= 2.7V
V
DD
= 4.75V
V
DD
= 3.6V
Figure 13. AD7922 SNR vs. Input Frequency at 1 MSPS
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