AD7682/AD7689
Data Sheet
Rev. D | Page 12 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V to 5.5 V, VREF = 2.5 V to 5 V, VIO = 2.3 V to VDD, unless otherwise noted.
1.5
1.0
0.5
0
–0.5
–1.5
–1.0
IN
L
(
L
S
B
)
CODES
0
16,384
32,768
49,152
65,536
INL MAX = +0.34 LSB
INL MIN = –0.44 LSB
07
35
3-
0
09
Figure 6. Integral Nonlinearity vs. Code, VREF = VDD = 5 V
200k
180k
160k
140k
120k
100k
80k
60k
40k
20k
0
7FFA
CO
UN
T
S
CODE IN HEX
7FFB 7FFC 7FFD 7FFE 7FFF 8000
8001
8002
0
487
619
0
σ = 0.50
VREF = VDD = 5V
135,326
124,689
07
35
3-
00
7
Figure 7. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
050
25
75
100
125
A
M
P
L
IT
U
D
E
(
d
B
o
fF
u
ll-
S
ca
le
)
FREQUENCY (kHz)
VREF = VDD = 5V
fS= 250kSPS
fIN = 19.9kHz
SNR = 92.9dB
SINAD = 92.4dB
THD = –102dB
SFDR = 103dB
SECOND HARMONIC = –111dB
THIRD HARMONIC = –104dB
07
35
3-
0
08
Figure 8. 20 kHz FFT, VREF = VDD = 5 V
1.5
07
35
3-
00
6
1.0
0.5
0
–0.5
–1.0
0
16,384
32,768
49,152
65,536
DN
L
(
L
S
B
)
CODES
DNL MAX = +0.20 LSB
DNL MIN = –0.22 LSB
Figure 9. Differential Nonlinearity vs. Code, VREF = VDD = 5 V
160k
140k
120k
100k
80k
60k
40k
20k
0
CO
UN
T
S
CODE IN HEX
7FFB 7FFC 7FFD 7FFE 7FFF 8000
8001
8002
8003
178
6649
51,778
4090
60
1
σ = 0.78
VREF = VDD = 2.5V
63,257
135,207
07
35
3-
01
0
Figure 10. Histogram of a DC Input at Code Center
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
050
25
75
100
A
M
P
L
IT
U
D
E
(
d
B
o
fF
u
ll-
S
ca
le
)
FREQUENCY (kHz)
VREF = VDD = 2.5V
fs= 200kSPS
fIN = 19.9kHz
SNR = 88.0dB
SINAD = 87.0dB
THD = –89dB
SFDR = 89dB
SECOND HARMONIC = –105dB
THIRD HARMONIC = –90dB
07
35
3-
01
1
Figure 11. 20 kHz FFT, VREF = VDD = 2.5 V