AD7476ART Analog Devices, AD7476ART Datasheet - Page 8

• Manufacturer Part Number: AD7476ART
• Description: 1 MSPS/ 12-/10-/8-Bit ADCs in 6-Lead SOT-23
• Manufacturer: Analog Devices

AD7476/AD7477/AD7478
PERFORMANCE CURVES
Figure 2 shows a typical FFT plot for the AD7476 at 1 MHz
sample rate and 100 kHz input frequency.
Figure 3 shows a typical FFT plot for the AD7476 at 600 kHz
sample rate and 100 kHz input frequency.
Figure 4 shows a typical FFT plot for the AD7477 at 1 MHz
sample rate and 100 kHz input frequency.
–115
–100
–115
–15
–35
–55
–75
–95
–10
–20
–30
–40
–50
–60
–70
–80
–90
–15
–15
–35
–55
–75
–95
0
0
0
0
0
50
50
50
100
100
150
150
100
FREQUENCY – kHz
FREQUENCY – kHz
FREQUENCY – kHz
200
200
150
250
250
300
300
200
8192 POINT FFT
f
f
SINAD = 71.71dB
THD = –80.88dB
SFDR = –83.23dB
8192 POINT FFT
f
f
SINAD = 71.67dB
THD = –81.00dB
SFDR = –81.63dB
SAMPLE
IN
8192 POINT FFT
f
f
SINAD = 61.66dB
THD = –80.64dB
SFDR = –85.75dB
SAMPLE
IN
SAMPLE
IN
350
350
= 100kHz
= 100kHz
= 100kHz
400
400
= 600kSPS
= 1MSPS
= 1MSPS
250
450
450
300
500
500
Figure 5 shows a typical FFT plot for the AD7478 at 1 MHz
sample rate and 100 kHz input frequency.
Figure 6 shows the signal-to-(noise + distortion) ratio performance
versus input frequency for various supply voltages while sampling
at 993 kSPS with an SCLK frequency of 20 MHz.
Figure 7 shows the signal-to-(noise + distortion) ratio performance
versus input frequency for various supply voltages while sampling
at 605 kSPS with a SCLK frequency of 12 MHz.
–69.0
–69.5
–70.0
–70.5
–71.0
–71.5
–72.0
–72.5
–10
–20
–30
–40
–50
–60
–70
–80
–90
–66
–67
–68
–69
–70
–71
–72
–73
0
10k
0
10k
50
100
150
INPUT FREQUENCY – Hz
INPUT FREQUENCY – Hz
FREQUENCY – kHz
200
V
DD
100k
250
100k
= 5.25V
300
V
8192 POINT FFT
FSAMPLE = 1MSPS
FIN = 100kHz
SINAD = 49.82dB
THD = –75.22dB
SFDR = –67.78dB
DD
350
= 2.35V
V
V
DD
DD
400
V
V
V
V
V
V
= 3.6V
DD
DD
DD
DD
DD
= 2.7V
DD
= 2.35V
= 2.7V
= 5.25V
= 4.75V
= 3.6V
450
= 4.75V
500
1M
1M