AD7667 Analog Devices, AD7667 Datasheet - Page 13

• Manufacturer Part Number: AD7667
• Manufacturer: Analog Devices

Specifications of AD7667

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Par,Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p,2.5V p-p,Uni (Vref),Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

140000
120000
100000
80000
60000
40000
20000
–100
–120
–140
–160
–180
–20
–40
–60
–80
91
90
89
88
87
86
85
84
83
82
81
0
0
0
1
7FFE
1
Figure 11. Histogram of 261,120 Conversions of a
Figure 13. SNR, S/(N+D), and ENOB vs. Frequency
7FFF
344
100
DC Input at the Code Transition
14654
8000
10
Figure 12. FFT Plot
FREQUENCY (kHz)
FREQUENCY (kHz)
200
113049
CODE IN HEX
8001
116794
8002
300
100
15970
8003
f
f
SNR = 88.9dB
THD = –94.2dB
SFDR = 94.7dB
S/[N+D] = 88dB
S
IN
= 1MSPS
ENOB
= 101.11kHz
400
S/[N+D]
8004
308
SNR
8005
0
1000
500
13.0
15.5
15.0
14.5
14.0
13.5
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180000
160000
140000
120000
100000
80000
60000
40000
20000
–100
–105
–110
–115
–120
–70
–75
–80
–85
–90
–95
Figure 16. SNR and S/[N+D] vs. Input Level (Referred to Full Scale)
91
90
89
88
–60
0
1
7FFE 7FFF 8000
Figure 15. THD, Harmonics, and SFDR vs. Frequency
0
Figure 14. Histogram of 261,120 Conversions of a
–50
35
2602
DC Input at the Code Center
–40
10
FREQUENCY (kHz)
S/[N+D]
56646
INPUT LEVEL (dB)
8001
SNR
CODE IN HEX
THIRD
HARMONIC
THD
146923
8002
–30
SFDR
51940
8003
–20
100
2958
8004
SECOND
HARMONIC
–10
8005
16
8006
AD7667
0
1000
0
120
110
100
90
80
70
60
50
40
30
20