English
Language : 

EVAL-AD7689EDZ Datasheet, PDF (13/32 Pages) Analog Devices – 16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC
◁
Data Sheet
100
95
90
85
80
75
70
VREF = VDD = 5V, –0.5dB
VREF = VDD = 5V, –10dB
VREF = VDD = 2.5V, –0.5dB
65
VREF = VDD = 2.5V, –10dB
60
0
50
100
150
200
FREQUENCY (kHz)
Figure 12. SNR vs. Frequency
96
17.0
SNR @ 2kHz
94
SINAD @ 2kHz
16.5
SNR @ 20kHz
SINAD @ 20kHz
92
ENOB @ 2kHz
16.0
ENOB @ 20kHz
90
15.5
88
15.0
86
14.5
84
14.0
82
13.5
80
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 13. SNR, SINAD, and ENOB vs. Reference Voltage
96
fIN = 20kHz
94
VREF = VDD = 5V
92
90
88
VREF = VDD = 2.5V
86
84
–55 –35 –15
5 25 45 65
TEMPERATURE (°C)
85 105 125
Figure 14. SNR vs. Temperature
AD7682/AD7689
100
95
90
85
80
75
70
VREF = VDD = 5V, –0.5dB
VREF = VDD = 5V, –10dB
VREF = VDD = 2.5V, –0.5dB
65
VREF = VDD = 2.5V, –10dB
60
0
50
100
150
200
FREQUENCY (kHz)
Figure 15. SINAD vs. Frequency
130
125
120
115
110
105
100
95
90
85
80
75
70
1.0
–60
–65
–70
SFDR = 2kHz
–75
–80
–85
SFDR = 20kHz
–90
THD = 20kHz
–95
–100
THD = 2kHz
–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 16. SFDR and THD vs. Reference Voltage
–90
fIN = 20kHz
–95
–100
VREF = VDD = 5V
VREF = VDD = 2.5V
–105
–110
–55 –35 –15
5 25 45 65
TEMPERATURE (°C)
85 105 125
Figure 17. THD vs. Temperature
Rev. D | Page 13 of 32
 ▷