AD7682 데이터 시트보기 (PDF) - Analog Devices
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AD7682 Datasheet PDF : 28 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
0
16,384
32,768
CODES
49,152
65,536
Figure 6. Integral Nonlinearity vs. Code, VREF = VDD = 5 V
200k
180k
160k
140k
120k
135,326
124,689
σ = 0.50
VREF = VDD = 5V
100k
80k
60k
40k
20k
0
0 487
619
0
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF
CODE IN HEX
0
8000
0
8001
0
8002
Figure 7. Histogram of a DC Input at Code Center
0
VREF = VDD = 5V
–20
fS= 250kSPS
fIN = 19.9kHz
–40
SNR = 92.9dB
SINAD = 92.4dB
–60
THD = –102dB
SFDR = 103dB
SECOND HARMONIC = –111dB
–80
THIRD HARMONIC = –104dB
–100
–120
–140
–160
–180
0
25
50
75
100
125
FREQUENCY (kHz)
Figure 8. 20 kHz FFT, VREF = VDD = 5 V
AD7682/AD7689
1.5
1.0
0.5
0
–0.5
–1.0
0
16,384
32,768
CODES
49,152
65,536
Figure 9. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
160k
140k
135,207
σ = 0.78
VREF = VDD = 2.5V
120k
100k
80k
63,257
60k
51,778
40k
20k
6649
1 78
0
7FFB 7FFC 7FFD 7FFE 7FFF 8000
CODE IN HEX
4090
8001
60
8002
1
8003
Figure 10. Histogram of a DC Input at Code Center
0
VREF = VDD = 2.5V
–20
fs= 200kSPS
fIN = 19.9kHz
–40
SNR = 88.0dB
SINAD = 87.0dB
–60
THD = –89dB
SFDR = 89dB
SECOND HARMONIC = –105dB
–80
THIRD HARMONIC = –90dB
–100
–120
–140
–160
–180
0
25
50
75
100
FREQUENCY (kHz)
Figure 11. 20 kHz FFT, VREF = VDD = 2.5 V
Rev. 0 | Page 11 of 28
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