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AD7689ACPZ Fiches technique(PDF) 11 Page - Analog Devices

No de pièce AD7689ACPZ
Description  16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC
Download  28 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD7689ACPZ Fiches technique(HTML) 11 Page - Analog Devices

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AD7682/AD7689
Rev. 0 | Page 11 of 28
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
–1.5
–1.0
CODES
0
16,384
32,768
49,152
65,536
Figure 6. Integral Nonlinearity vs. Code, VREF = VDD = 5 V
200k
180k
160k
140k
120k
100k
80k
60k
40k
20k
0
7FFA
CODE IN HEX
7FFB 7FFC 7FFD 7FFE 7FFF 8000
8001
8002
0
0
487
619
0
0
0
σ = 0.50
VREF = VDD = 5V
135,326
124,689
Figure 7. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
050
25
75
100
125
FREQUENCY (kHz)
VREF = VDD = 5V
fS= 250kSPS
fIN = 19.9kHz
SNR = 92.9dB
SINAD = 92.4dB
THD = –102dB
SFDR = 103dB
SECOND HARMONIC = –111dB
THIRD HARMONIC = –104dB
Figure 8. 20 kHz FFT, VREF = VDD = 5 V
1.5
1.0
0.5
0
–0.5
–1.0
0
16,384
32,768
49,152
65,536
CODES
Figure 9. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
160k
140k
120k
100k
80k
60k
40k
20k
0
CODE IN HEX
7FFB 7FFC 7FFD 7FFE 7FFF 8000
8001
8002
8003
178
6649
51,778
4090
60
1
σ = 0.78
VREF = VDD = 2.5V
63,257
135,207
Figure 10. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
050
25
75
100
FREQUENCY (kHz)
VREF = VDD = 2.5V
fs= 200kSPS
fIN = 19.9kHz
SNR = 88.0dB
SINAD = 87.0dB
THD = –89dB
SFDR = 89dB
SECOND HARMONIC = –105dB
THIRD HARMONIC = –90dB
Figure 11. 20 kHz FFT, VREF = VDD = 2.5 V


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