Datasheet

AD7693
Rev. A | Page 9 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, V
REF
= VDD, T
A
= 25C.
1.0
–1.0
0 65536
CODE
INL (LSB)
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
16384 32768 49152
POSITIVE INL = +0.17LSB
NEGATIVE INL = –0.17LSB
06394-007
Figure 7. Integral Nonlinearity vs. Code
300000
0
67
CODE IN HEX
COUNTS
250000
200000
150000
100000
50000
8 9 ABC
00 00
258774
1905
441
0
6394-008
Figure 8. Histogram of a DC Input at the Code Center
0
–180
02
FREQUENCY (kHz)
AMPLITUDE (dB of Full Scale)
00
–20
–40
–60
–80
–100
–120
–140
–160
40 6020 16014012010080 180
f
S
= 500kSPS
f
IN
= 0.95kHz
SNR = 96.4dB
THD = –121dB
SFDR = 124dB
SINAD = 96.4dB
06394-009
Figure 9. FFT Plot
1.0
–1.0
0 65536
CODE
DNL (LSB)
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
16384 32768 49152
POSITIVE DNL = +0.22LSB
NEGATIVE DNL = –0.22LSB
06394-010
Figure 10. Differential Nonlinearity vs. Code
160000
0
7
CODE IN HEX
COUNTS
120000
140000
100000
80000
60000
40000
20000
89ABCD
00 0
126066
135054
00
0
6394-011
Figure 11. Histogram of a DC Input at the Code Transition
SNR (dB)
THD (dB)
INPUT LEVEL (dB)
–130
–125
–120
–115
–110
–105
–100
–95
–90
–85
–
80
SNR
THD
90
91
92
93
94
95
96
97
98
99
100
–10 –8 –6 –4 –2 0
0
6394-012
Figure 12. SNR, THD vs. Input Level