AD7666 Analog Devices, AD7666 Datasheet - Page 13

• Manufacturer Part Number: AD7666
• Manufacturer: Analog Devices

Specifications of AD7666

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 500kSPS
• 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

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
7FFC
0
Figure 11. Histogram of 261,120 Conversions of a
Figure 13. SNR, S/(N+D), and ENOB vs. Frequency
7FFD
1
50
DC Input at the Code Transition
211
7FFE 7FFF
15968
10
Figure 12. FFT Plot
FREQUENCY (kHz)
FREQUENCY (kHz)
100
111791
CODE IN HEX
8000
112335
150
8001
20187
100
f
f
SNR = 88.6dB
THD = –98.1dB
SFDR = 99.2dB
S/[N+D] = 88.1dB
ENOB
8002
S
IN
= 500kSPS
623
= 101.361kHz
200
S/[N+D]
8003
SNR
4
8004
0
1000
250
13.0
15.5
15.0
14.5
14.0
13.5
Rev. 0 | Page 13 of 28
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
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000
Figure 15. THD, Harmonics, and SFDR vs. Frequency
0
Figure 14. Histogram of 261,120 Conversions of a
–50
11
2789
DC Input at the Code Center
–40
10
FREQUENCY (kHz)
S/[N+D]
INPUT LEVEL (dB)
52691
SNR
CODE IN HEX
THD
THIRD
HARMONIC
148481
–30
SFDR
53814
–20
100
3300
SECOND
HARMONIC
–10
8001
34
AD7666
8002
0
1000
0
120
110
100
90
80
70
60
50
40
30
20