Datasheet

AD7476/AD7477/AD7478
Rev. F | Page 11 of 24
TYPICAL PERFORMANCE CHARACTERISTICS
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
0 50045040035030025020015010050
SNR (dB)
FREQUENCY (kHz)
01024-007
8192 POINT FFT
f
SAMPLE
= 1MSPS
f
IN
= 100kHz
SINAD = 49.82dB
THD = –75.22dB
SFDR = –67.78dB
–15
–35
–55
–75
–95
–115
0 50045040035030025020015010050
SNR (dB)
FREQUENCY (kHz)
01024-004
8192 POINT FFT
f
SAMPLE
= 1MSPS
f
IN
= 100kHz
SINAD = 71.67dB
THD = –81.00dB
SFDR = –81.63dB
Figure 4. AD7476 Dynamic Performance at 1 MSPS
Figure 7. AD7478 Dynamic Performance at 1 MSPS
–
66
–73
–72
–71
–70
–69
–68
–67
10k 1M100k
SINAD (dB)
INPUT FREQUENCY (kHz)
01024-008
V
DD
= 2.35V
SCLK = 20MHz
V
DD
= 2.7V
V
DD
= 5.25V
V
DD
= 3.6V
V
DD
= 4.75V
–15
–35
–55
–75
–95
–115
0 30025020015010050
SNR (dB)
FREQUENCY (kHz)
01024-005
8192 POINT FFT
f
SAMPLE
= 600kSPS
f
IN
= 100kHz
SINAD = 71.71dB
THD = –80.88dB
SFDR = –83.23dB
Figure 5. AD7476 Dynamic Performance at 600 kSPS
Figure 8. AD7476 SINAD vs. Input Frequency at 993 kSPS
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0 50045040035030025020015010050
SNR (dB)
FREQUENCY (kHz)
01024-006
8192 POINT FFT
f
SAMPLE
= 1MSPS
f
IN
= 100kHz
SINAD = 61.66dB
THD = –80.64dB
SFDR = –85.75dB
–
69.0
–72.5
–72.0
–71.5
–71.0
–70.5
–70.0
–69.5
10k 1M100k
SINAD (dB)
INPUT FREQUENCY (kHz)
01024-009
SCLK = 12MHz
V
DD
= 2.35V
V
DD
= 2.7V
V
DD
= 5.25V
V
DD
= 4.75V
V
DD
= 3.6V
Figure 6. AD7477 Dynamic Performance at 1 MSPS
Figure 9. AD7476 SINAD vs. Input Frequency at 605 kSPS