AD7655 Analog Devices, AD7655 Datasheet - Page 12

• Manufacturer Part Number: AD7655
• Manufacturer: Analog Devices

Specifications of AD7655

• Resolution (bits): 16bit
• # Chan: 4
• Sample Rate: 1MSPS
• Interface: Par,Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7655
TYPICAL PERFORMANCE CHARACTERISTICS
8000
7000
6000
5000
4000
3000
2000
1000
–100
–120
–140
–160
–180
–20
–40
–60
–80
Figure 6. Histogram of 16,384 Conversions of a DC Input at the
–1
–2
–3
–4
–5
0
0
5
4
3
2
1
0
0
0
7FFC
0
25
7FFD
Figure 5. Integral Nonlinearity vs. Code
0
50
16384
7FFE 7FFF 8000 8001 8002 8003 8004 8005
77
75
1094
Figure 7. FFT Plot
Code Transition
FREQUENCY (kHz)
100
CODE IN HEX
7059
CODE
32768
125
6894
150
1230
8192 POINT FFT
f
f
SNR = 85.8dB
THD = –91.4dB
SFDR = 93.6dB
SINAD = 84.5dB
S
IN
= 500kHz
= 100kHz, –0.5dB
175
49152
29
200
0
225
0
65536
250
Rev. B | Page 12 of 28
8000
7000
6000
5000
4000
3000
2000
1000
9000
Figure 9. Histogram of 16,384 Conversions of a DC Input at the
96
93
90
87
84
–2
–3
–1
3
2
1
0
0
–55
0
7FFC
0
–35
Figure 8. Differential Nonlinearity vs. Code
7FFD 7FFE 7FFF 8000
5
Figure 10. SNR, THD vs. Temperature
–15
16384
THD
220
5
TEMPERATURE (°C)
3505
SNR
Code Center
CODE IN HEX
25
CODE
32768
8480
45
3396
8001
65
739
8002
49152
85
8003
39
105
8004
0
65536
125
–90
–94
–98
–102
–106