Datasheet

AD7988-1/AD7988-5 Data Sheet
Rev. D | Page 10 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V, V
REF
= 5.0 V, VIO = 3.3 V, unless otherwise noted.
0
–180
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
–160
f
S
= 500kSPS
f
IN
= 10kHz
SNR = 91.17dB
THD = –113.63dB
SFDR = 110.30dB
SINAD = 91.15dB
AMPLITUDE (dB of FULL SCALE)
0
50 100
150 200 250
10231-046
Figure 6. AD7988-5 FFT Plot, V
REF
= 5 V
0
–180
FREQUENCY (k
Hz)
–20
–40
–60
–80
–100
–120
–140
–160
f
S
= 500kSPS
f
IN
= 10kHz
SNR = 86.8dB
THD = –111.4dB
SFDR = 105.9dB
SINAD = 86.8dB
AMPLITUDE (dB of FULL SCALE)
0 50 100 150
200 250
10231-047
Figure 7. AD7988-5 FFT Plot, V
REF
= 2.5 V
0
–180
FREQUENCY (kHz)
–20
–40
–60
–80
–100
–120
–140
–160
f
S
= 100kSPS
f
IN
= 10kHz
SNR = 91.09dB
THD = –113.12dB
SFDR = 110.30dB
SINAD = 91.05dB
AMPLITUDE (dB of FULL SCALE)
0 10 20 30 40 50
10231-048
Figure 8. AD7988-1 FFT Plot, V
REF
= 5 V
0
–180
FREQ
UENC
Y (k
Hz)
–20
–40
–60
–80
–100
–120
–140
–160
f
S
= 100kSPS
f
IN
= 10kHz
SNR = 86.7dB
THD = –110.4dB
SFDR = 103.9dB
SINAD = 86.6dB
AMPLITUDE (dB of FULL SCALE)
0 10
20 30
40 50
10231-049
Figure 9. AD7988-1 FFT Plot, V
REF
= 2.5 V
1.25
–1
.25
CODE
INL (LSB)
1.0
0
0.75
0.5
0
0.25
–0
.25
–0.7
5
0
–0.50
–1.00
PO
SIT
IVE
INL:
+0.40 L
SB
NEGA
TIV
E INL
: –0.3
5 LSB
0
16384 32768 49152 65536
10231-010
Figure 10. Integral Nonlinearity vs. Code, V
REF
= 5 V
1.25
1.00
–
1.25
–1.00
IN
L (LSB)
0.75
0.50
0.25
–0.
25
–0.75
0
–
0.50
POSITIV
E IN
L: +0.
45 L
SB
NEGATIVE INL: –0.
29 LS
B
C
ODE
0 16384 32768 49152 65536
10231-011
Figure 11. Integral Nonlinearity vs. Code, V
REF
= 2.5 V