AD7651 Analog Devices, AD7651 Datasheet - Page 12

• Manufacturer Part Number: AD7651
• Manufacturer: Analog Devices

Specifications of AD7651

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 100kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: Uni (Vref),Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7651
TYPICAL PERFORMANCE CHARACTERISTICS
140000
120000
100000
–100
–120
–140
–160
–180
80000
60000
40000
20000
–20
–40
–60
–80
–1
–2
–3
–4
0
4
3
2
1
0
0
0
0
7FFB
Figure 6. Histogram of 261,120 Conversions of a
f
f
SNR = 86.7dB
THD = 102.5dB
SFDR = 103.6dB
S/[N+D] = 86.6dB
S
IN
0
= 100kSPS
= 45.7kHz
Figure 5. Integral Nonlinearity vs. Code
7FFC 7FFD 7FFE 7FFF
0
DC Input at the Code Transition
10
16384
479
Figure 7. FFT Plot
20890
FREQUENCY (kHz)
20
114156
CODE IN HEX
CODE
32768
114686
8000 8001
30
10822
49152
8002
137
40
8003
0
02964-0-029
02964-0-026
02964-0-027
8004
0
65536
50
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180000
160000
140000
120000
100000
80000
60000
40000
20000
–0.5
–1.0
90
89
88
87
86
85
84
83
82
81
80
2.0
1.5
1.0
0.5
0
0
0
1
Figure 10. SNR, S/(N+D), and ENOB vs. Frequency
Figure 9. Histogram of 261,120 Conversions of a
7FFC 7FFD 7FFE 7FFF
0
Figure 8. Differential Nonlinearity vs. Code
19
DC Input at the Code Center
16384
2896
10
FREQUENCY (kHz)
51585
CODE IN HEX
CODE
32768
155528
8000
49184
8001
100
ENOB
1903
8002
49152
S/[N+D]
8003
5
SNR
02964-0-030
02964-0-023
02964-0-028
8004
0
65536
1000
15.5
15.0
14.5
14.0
13.5
13.0