AD7949(RevA) Просмотр технического описания (PDF) - Analog Devices
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AD7949 Datasheet PDF : 28 Pages
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90
85
80
75
70
VDD = VREF = 5V, –0.5dB
VDD = VREF = 5V, –10dB
65
VDD = VREF = 2.5V, –0.5dB
VDD = VREF = 2.5V, –10dB
60
0
50
100
150
200
FREQUENCY (kHz)
Figure 11. SNR vs. Frequency
88
15.5
SNR
SINAD
ENOB
86
15.0
84
14.5
82
14.0
80
13.5
78
13.0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
REFERENCE VOLTAGE (V)
Figure 12. SNR, SINAD, and ENOB vs. Reference Voltage
90
fIN = 20kHz
85
VDD = VREF = 5V
VDD = VREF = 2.5V
80
75
70
65
60
–55 –35 –15
5 25 45 65
TEMPERATURE (°C)
85 105 125
Figure 13. SNR vs. Temperature
AD7949
90
85
80
75
70
VDD = VREF = 5V, –0.5dB
VDD = VREF = 5V, –10dB
65
VDD = VREF = 2.5V, –0.5dB
VDD = VREF = 2.5V, –10dB
60
0
50
100
150
200
FREQUENCY (kHz)
Figure 14. SINAD vs. Frequency
130
125
120
115
110
105
100
95
90
85
80
75
70
1.0
–60
–65
–70
–75
–80
SFDR
–85
–90
THD
–95
–100
–105
–110
–115
–120
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
REFERENCE VOLTAGE (V)
Figure 15. SFDR and THD vs. Reference Voltage
–90
fIN = 20kHz
–95
–100
VDD = VREF = 5V
VDD = VREF = 2.5V
–105
–110
–55 –35 –15
5 25 45 65
TEMPERATURE (°C)
85 105 125
Figure 16. THD vs. Temperature
Rev. A | Page 11 of 28
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