AD7682 Analog Devices, AD7682 Datasheet - Page 13

• Manufacturer Part Number: AD7682
• Manufacturer: Analog Devices

Specifications of AD7682

• Resolution (bits): 16bit
• # Chan: 4
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Bip,SE-Uni
• Ain Range: Bip (Vref) x 0.5,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
96
94
92
90
88
86
84
82
80
1.0
100
96
94
92
90
88
86
84
95
90
85
80
75
70
65
60
–55
0
Figure 13. SNR, SINAD, and ENOB vs. Reference Voltage
f
1.5
IN
= 20kHz
–35
SNR @ 2kHz
SINAD @ 2kHz
SNR @ 20kHz
SINAD @ 20kHz
ENOB @ 2kHz
ENOB @ 20kHz
V
V
V
V
2.0
REF
REF
REF
REF
–15
Figure 14. SNR vs. Temperature
= VDD = 5V, –0.5dB
= VDD = 5V, –10dB
= VDD = 2.5V, –0.5dB
= VDD = 2.5V, –10dB
Figure 12. SNR vs. Frequency
50
REFERENCE VOLTAGE (V)
2.5
5
TEMPERATURE (°C)
FREQUENCY (kHz)
3.0
25
100
3.5
V
REF
45
V
4.0
= VDD = 2.5V
REF
65
= VDD = 5V
4.5
150
85
5.0
105
5.5
125
200
17.0
16.5
16.0
15.5
15.0
14.5
14.0
13.5
13.0
Rev. C | Page 13 of 32
130
125
120
115
110
105
100
95
90
85
80
75
70
–100
–105
–110
1.0
100
–90
–95
95
90
85
80
75
70
65
60
–55
0
f
1.5
IN
Figure 16. SFDR and THD vs. Reference Voltage
= 20kHz
–35
V
V
V
V
V
2.0
V
REF
REF
REF
REF
REF
REF
Figure 17. THD vs. Temperature
Figure 15. SINAD vs. Frequency
–15
= VDD = 5V, –0.5dB
= VDD = 5V, –10dB
= VDD = 2.5V, –0.5dB
= VDD = 2.5V, –10dB
= VDD = 2.5V
REFERENCE VOLTAGE (V)
50
= VDD = 5V
2.5
5
FREQUENCY (kHz)
TEMPERATURE (°C)
SFDR = 2kHz
SFDR = 20kHz
THD = 20kHz
THD = 2kHz
3.0
25
100
3.5
45
4.0
AD7682/AD7689
65
4.5
150
85
5.0
105
5.5
–60
–65
–70
–75
–80
–85
–90
–95
–100
–105
–110
–115
–120
200
125