±
160
±
120
±
80
±
40
0
0
50000
100000
150000
200000
250000
A
m
p
lit
u
d
e
(
d
B
)
Input Frequency (Hz)
C049
±
160
±
120
±
80
±
40
0
0
50000
100000
150000
200000
250000
A
m
p
lit
u
d
e
(
d
B
)
Input Frequency (Hz)
C050
±
160
±
120
±
80
±
40
0
0
50000
100000
150000
200000
250000
A
m
p
lit
u
d
e
(
d
B
)
Input Frequency (Hz)
C047
±
160
±
120
±
80
±
40
0
0
50000
100000
150000
200000
250000
A
m
p
lit
u
d
e
(
d
B
)
Input Frequency (Hz)
C048
±
160
±
120
±
80
±
40
0
0
50000
100000
150000
200000
250000
A
m
p
lit
u
d
e
(
d
B
)
Input Frequency (Hz)
C045
±
160
±
120
±
80
±
40
0
0
50000
100000
150000
200000
250000
A
m
p
lit
u
d
e
(
d
B
)
Input Frequency (Hz)
C046
SBAS492 – JULY 2015
Typical Characteristics (continued)
At T
A
= 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V
REF
= 4.096 V, and f
SAMPLE
= 500 kSPS, unless otherwise noted.
Number of points = 4k, f
IN
= 1 kHz, SNR = 73.65 dB,
Number of points = 4k, f
IN
= 1 kHz, SNR = 73.67 dB,
SINAD = 73.64 dB, THD = –92.382 dB, SFDR = 94 dB
SINAD = 73.67 dB, THD = –93.93 dB, SFDR = 94 dB
Figure 44. Typical FFT Plot (±0.625 × V
REF
)
Figure 45. Typical FFT Plot (2.5 × V
REF
)
Number of points = 4k, f
IN
= 1 kHz, SNR = 73.64 dB,
Number of points = 4k, f
IN
= 1 kHz, SNR = 73.44 dB,
SINAD = 73.64 dB, THD = –91.022 dB, SFDR = 94 dB
SINAD = 73.43 dB, THD = –92.382 dB, SFDR = 94 dB
Figure 46. Typical FFT Plot (1.25 × V
REF
)
Figure 47. Typical FFT Plot (±0.3125 × V
REF
)
Number of points = 4k, f
IN
= 1 kHz, SNR = 72.57 dB,
Number of points = 4k, f
IN
= 1 kHz, SNR = 73.44 dB,
SINAD = 72.56 dB, THD = –92.382 dB, SFDR = 94 dB
SINAD = 73.43 dB, THD = –91.02 dB, SFDR = 94 dB
Figure 48. Typical FFT Plot (±0.15625 × V
REF
)
Figure 49. Typical FFT Plot (0.625 × V
REF
)
18
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