Datasheet

AD7655
Rev. B | Page 12 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
65536
CODE
INL (LSB)
0
–4
–5
–2
–3
–1
2
1
4
3
5
16384
0
32768
49152
03536-005
Figure 5. Integral Nonlinearity vs. Code
CODE IN HEX
COUNTS
4000
3000
2000
1000
0
7FFD
7059
1094
1230
77
29
0
0
00
7FFE 7FFF 8000 8001 8002 8003 8004 8005
8000
7000
6000
5000
7FFC
6894
03536-006
Figure 6. Histogram of 16,384 Conversions of a DC Input at the
Code Transition
FREQUENCY (kHz)
AMPLITUDE (dB of Full Scale)
–140
–160
–180
0
25
125
150
50
75
100
175
200
225
250
–80
–100
–120
–20
–40
–60
0
8192 POINT FFT
f
S
= 500kHz
f
IN
= 100kHz, –0.5dB
SNR = 85.8dB
THD = –91.4dB
SFDR = 93.6dB
SINAD = 84.5dB
03536-007
Figure 7. FFT Plot
65536
CODE
DNL (LSB)
0
–3
–2
–1
1
2
3
163840
32768
49152
03536-008
Figure 8. Differential Nonlinearity vs. Code
CODE IN HEX
COUNTS
4000
3000
2000
1000
0
8480
3505
3396
220
739
39
0
0
5
9000
8000
7000
6000
5000
03536-009
7FFD 7FFE 7FFF 8000 8001 8002 8003 80047FFC
Figure 9. Histogram of 16,384 Conversions of a DC Input at the
Code Center
TEMPERATURE (°C)
SNR (dB)
90
87
84
–15 5 25 45 65 85 105 125
96
93
–35
–55
–98
–102
–106
–90
–94
THD (dB)
THD
SNR
03536-010
Figure 10. SNR, THD vs. Temperature