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參數(shù)資料
型號: AD7724AST
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: Dual CMOS Modulators
中文描述: 2-CH 1-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQFP48
封裝: PLASTIC, LQFP-48
文件頁數(shù): 9/14頁
文件大小: 552K
代理商: AD7724AST
REV. A
AD7724
–9–
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
d
0
6.5
FREQUENCY – MHz
Figure 15. Modulator Output (0 Hz to MCLK/2)
0
–154
d
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3 20E+3 30E+3 40E+3 50E+3 60E+3
70E+3 80E+3
98E+3
CLKIN = 13MHz
SNR = 90.1dB
S/(N+D) = 89.2dB
SFDR = –99.5dB
THD = –96.6dB
2ND = –100.9dB
3RD = –106.0dB
4TH = –99.5dB
90E+3
Figure 16. 16K Point FFT
0
–154
d
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3 20E+3 30E+3 40E+3
50E+3 60E+3 70E+3 80E+3
96E+3
90E+3
XTAL = 12.288MHz
SNR = 89.0dB
S/(N+D) = 87.8dB
SFDR = –94.3dB
THD = –93.8dB
2ND = –94.3dB
3RD = –108.5dB
4TH = –105.7dB
Figure 17. 16K Point FFT
CODE
I
1.0
0.8
–1.0
0
20000
65535
40000
–0.4
–0.8
–0.6
0
–0.2
0.6
0.2
0.4
Figure 14. Integral Nonlinearity Error
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
d
0
409.0268
FREQUENCY – kHz
Figure 18. Modulator Output (0 to 409.0268 kHz)
Figure 19. 16K Point FFT
Figure 20. 16K Point FFT
0
–154
d
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3 20E+3 30E+3 40E+3 50E+3
60E+3
70E+3 80E+3
98E+3
AIN = 90kHz
CLKIN = 13MHz
SNR = 89.6dB
S/(N+D) = 89.6dB
SFDR = –108.0dB
90E+3
0
–154
d
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3 20E+3 30E+3 40E+3 50E+3
60E+3
70E+3 80E+3
96E+3
AIN = 90kHz
XTAL = 12.288MHz
SNR = 88.1dB
S/(N+D) = 88.1dB
SFDR = –103.7dB
90E+3
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