AD7693
Rev. A | Page 9 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = 25C.
1.0
–1.0
0
65536
CODE
IN
L
(
L
S
B
)
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
06
39
4-
00
7
Figure 7. Integral Nonlinearity vs. Code
300000
0
67
CODE IN HEX
CO
UNT
S
250000
200000
150000
100000
50000
8
9
ABC
00
0
258774
1905
441
0
63
94
-00
8
Figure 8. Histogram of a DC Input at the Code Center
0
–180
02
FREQUENCY (kHz)
AM
P
L
IT
UDE
(
d
B
o
fF
u
ll
S
ca
le)
00
–20
–40
–60
–80
–100
–120
–140
–160
40
60
20
160
140
120
100
80
180
fS = 500kSPS
fIN = 0.95kHz
SNR = 96.4dB
THD = –121dB
SFDR = 124dB
SINAD = 96.4dB
06
39
4-
0
09
Figure 9. FFT Plot
1.0
–1.0
0
65536
CODE
DNL
(
L
S
B)
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
06
39
4-
0
10
Figure 10. Differential Nonlinearity vs. Code
160000
0
7
CODE IN HEX
CO
UNT
S
120000
140000
100000
80000
60000
40000
20000
89
A
B
C
D
00
0
126066
135054
00
0
63
94
-01
1
Figure 11. Histogram of a DC Input at the Code Transition
SN
R
(
d
B
)
T
HD
(
d
B)
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
63
94
-0
12
Figure 12. SNR, THD vs. Input Level