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參數資料
型號: AD7921
廠商: Analog Devices, Inc.
元件分類: ADC
英文描述: 2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs
中文描述: 2通道,2.35 V至5.25 V 250 kSPS的,10-/12-Bit模數轉換器
文件頁數: 13/28頁
文件大小: 312K
代理商: AD7921
AD7911/AD7921
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 10 and Figure 11 show typical FFT plots for the AD7921
and AD7911, respectively, at a 250 kSPS sample rate and
100 kHz input frequency.
Rev. 0 | Page 13 of 28
Figure 12 shows the SINAD ratio performance versus the input
frequency for various supply voltages while sampling at
250 kSPS with a SCLK frequency of 5 MHz for the AD7921.
Figure 13 shows the SNR ratio performance versus the input
frequency for various supply voltages while sampling at
250 kSPS with an SCLK frequency of 5 MHz for the AD7921.
Figure 14 and Figure 15 show INL and DNL performance for
the AD7921.
Figure 16 shows a graph of the total harmonic distortion versus
the analog input frequency for different source impedances
when using a supply voltage of 3.6 V and a sampling rate of
250 kSPS. See the Analog Input section.
Figure 17 shows a graph of the total harmonic distortion versus
the analog input frequency for various supply voltages while
sampling at 250 kSPS with an SCLK frequency of 5 MHz.
Figure 18 shows the shutdown current versus the voltage supply
for different operating temperatures.
5
–115
–95
–75
–55
–35
–15
0
20
40
60
80
100
120
0
FREQUENCY (kHz)
S
8192 POINT FFT
V
DD
= 2.7V
F
SAMP
= 250kSPS
F
SNR = 73.13dB
SINAD = 72.73dB
THD = –83.30dB
SFDR = –86.15dB
Figure 10. AD7921 Dynamic Performance at 250 kSPS
V
= 2.7V
F
F
SNR = 73.13dB
THD = –83.30dB
SFDR = –86.15dB
5
–115
–95
–75
–55
–35
–15
0
20
40
60
80
100
120
0
FREQUENCY (kHz)
S
8192 POINT FFT
V
DD
F
SAMP
= 250kSPS
F
SNR = 61.75dB
SINAD = 72.73dB
THD = –86.24dB
Figure 11. AD7911 Dynamic Performance at 250 kSPS
–70.5
–74.0
–73.5
–73.0
–72.5
–72.0
–71.5
–71.0
10
100
1k
0
FREQUENCY (kHz)
S
V
DD
= 3.6V
V
DD
= 5.25V
V
DD
= 4.75V
V
DD
= 2.35V
V
DD
= 2.7V
Figure 12. AD7921 SINAD vs. Input Frequency at 250 kSPS
–72.0
–73.6
–73.4
–73.2
–73.0
–72.8
–72.4
–72.2
–72.6
10
100
1k
0
FREQUENCY (kHz)
S
V
DD
= 2.35V
V
DD
= 3.6V
V
DD
= 5.25V
V
DD
= 4.75V
V
DD
= 2.7V
Figure 13. AD7921 SNR vs. Input Frequency at 250 kSPS
相關PDF資料
PDF描述
AD7921ARM 2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs
AD7921ARM-REEL 2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs
AD7921ARM-REEL7 2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs
AD7921AUJ-R2 2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs
AD7921AUJ-REEL7 2-Channel, 2.35 V to 5.25 V 250 kSPS, 10-/12-Bit ADCs
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