
AD7988-1/AD7988-5
Data Sheet
Rev. D | Page 10 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V, VREF = 5.0 V, VIO = 3.3 V, unless otherwise noted.
0
–180
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
–160
fS = 500kSPS
fIN = 10kHz
SNR = 91.17dB
THD = –113.63dB
SFDR = 110.30dB
SINAD = 91.15dB
A
M
P
LITU
D
E
(
dB
of
FU
LL
S
C
A
LE
)
0
50
100
150
200
250
10231-
046
0
–180
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
–160
fS = 500kSPS
fIN = 10kHz
SNR = 86.8dB
THD = –111.4dB
SFDR = 105.9dB
SINAD = 86.8dB
A
M
P
LITU
D
E
(
dB
of
FU
LL
S
C
A
LE
)
0
50
100
150
200
250
10231-
047
0
–180
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
–160
fS = 100kSPS
fIN = 10kHz
SNR = 91.09dB
THD = –113.12dB
SFDR = 110.30dB
SINAD = 91.05dB
A
M
P
LITU
D
E
(
dB
of
FU
LL
S
C
A
LE
)
0
10
20
30
40
50
10231-
048
0
–180
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
–160
fS = 100kSPS
fIN = 10kHz
SNR = 86.7dB
THD = –110.4dB
SFDR = 103.9dB
SINAD = 86.6dB
A
M
P
LITU
D
E
(
dB
of
FU
LL
S
C
A
LE
)
0
10
20
30
40
50
10231-
049
1.25
–1.25
CODE
IN
L
(L
S
B)
1.00
0.75
0.50
0.25
–0.25
–0.75
0
–0.50
–1.00
POSITIVE INL: +0.40 LSB
NEGATIVE INL: –0.35 LSB
0
16384
32768
49152
65536
10231-
010
Figure 10. Integral Nonlinearity vs. Code, VREF = 5 V
1.25
1.00
–1.25
–1.00
IN
L
(L
S
B
)
0.75
0.50
0.25
–0.25
–0.75
0
–0.50
POSITIVE INL: +0.45 LSB
NEGATIVE INL: –0.29 LSB
CODE
0
16384
32768
49152
65536
10231-
011
Figure 11. Integral Nonlinearity vs. Code, VREF = 2.5 V