Datasheet
AD7273/AD7274
Rev. 0 | Page 11 of 28
TYPICAL PERFORMANCE CHARACTERISTICS
–20
–40
–60
–80
–100
–120
0
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
FREQUENCY (kHz)
SNR (dB)
100
16384 POINT FFT
F
SAMPLE
= 3MSPS
F
IN
= 1MHz
SINAD = 71.05
THD = –80.9
SFDR = –82.2
04973-010
Figure 10. AD7274 Dynamic Performance at 3 MSPS, Input Tone = 1 MHz
–20
–40
–60
–80
–100
–120
0
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
FREQUENCY (kHz)
SNR (dB)
100
16384 POINT FFT
F
SAMPLE
= 3MSPS
F
IN
= 1MHz
SINAD = 66.56
THD = –77.4
SFDR = –78.2
04973-011
Figure 11. AD7273 Dynamic Performance at 3 MSP, Input Tone = 1 MHz
72.2
72.0
71.0
70.8
70.6
70.4
71.2
70.2
70.0
69.8
69.6
69.4
69.2
71.4
71.6
71.8
69.0
100
15001000
INPUT FREQUENCY (kHz)
SINAD (dB)
V
DD
= 3V
V
DD
= 3.6V
F
SAMPLE
= 3MSPS
04973-012
V
DD
= 2.5V
Figure 12. AD7274 SINAD vs. Analog Input Frequency at 3 MSPS
for Various Supply Voltages, SCLK Frequency = 48 MHz
72.2
72.0
71.8
71.6
71.4
71.2
71.0
70.8
70.6
70.4
70.2
100
15001000
INPUT FREQUENCY (kHz)
SNR (dB)
V
DD
= 3V
V
DD
= 2.5V
V
DD
= 3.6V
F
SAMPLE
= 3MSPS
04973-013
Figure 13. AD7274 SNR vs. Analog Input Frequency at 3 MSPS
for Various Supply Voltages, SCLK Frequency = 48 MHz
–72
–74
–76
–78
–80
–82
–84
–86
–88
–90
100
15001000
INPUT FREQUENCY (kHz)
THD (dB)
V
DD
= 2.5V
V
DD
= 3V
V
DD
= 3.6V
04973-014
Figure 14. THD vs. Analog Input Frequency at 3 MSPS
for Various Supply Voltages, SCLK Frequency = 48 MHz
–40
–50
–60
–70
–80
–90
100
15001000
INPUT FREQUENCY (kHz)
THD (dB)
R
IN
= 100
Ω
R
IN
= 0
Ω
R
IN
= 10
Ω
04973-015
Figure 15. THD vs. Analog Input Frequency at 3 MSPS for Various Source
Impedance, SCLK Frequency = 48 MHz, Supply Voltage = 3 V